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13 / 202 9802 / 22854

HTTP (curl)

Time of First Successful Submission: 2024-11-01 01:13:51

HTTP (python)

Time of First Successful Submission: 2024-11-07 16:27:07

URL Encoding (curl)

Time of First Successful Submission: 2025-01-06 12:29:07

URL Encoding (python)

Time of First Successful Submission: 2025-01-06 12:31:39

HTTP GET Parameters (netcat)

Time of First Successful Submission: 2025-01-06 12:38:56

HTTP GET Parameters (python)

Time of First Successful Submission: 2025-01-06 12:41:15

Multiple HTTP Parameters (python)

Time of First Successful Submission: 2025-01-06 12:59:23

Multiple Form Fields (python)

Time of First Successful Submission: 2025-01-06 17:59:55

HTTP JSON (curl)

Time of First Successful Submission: 2025-01-06 18:04:20

HTTP JSON (python)

Time of First Successful Submission: 2025-01-06 18:08:10

Complex HTTP JSON (curl)

Time of First Successful Submission: 2025-01-07 06:27:08

Complex HTTP JSON (python)

Time of First Successful Submission: 2025-01-06 18:12:24

Server State (curl)

Time of First Successful Submission: 2025-01-07 07:14:55

CTF Archive

5 / 703 431 / 779

CRYPTO - 100 - 1

Time of First Successful Submission: 2024-09-14 21:14:45

CRYPTO - 100 - 2

Time of First Successful Submission: 2024-09-14 21:28:41

CRYPTO - 100 - 3

Time of First Successful Submission: 2024-09-14 21:30:24

CRYPTO - 100 - 4

Time of First Successful Submission: 2024-09-14 21:38:42

CRYPTO - 200 - 5

Time of First Successful Submission: 2024-09-14 21:44:16

Intro to Programming Languages

15 / 234 4743 / 33248

Commands

Time of First Successful Submission: 2024-09-10 00:24:05

Command Arguments

Time of First Successful Submission: 2024-09-10 00:26:01

Command History

Time of First Successful Submission: 2025-08-25 16:07:47

The Root Path

Time of First Successful Submission: 2024-09-10 00:27:55

Absolute Paths

Time of First Successful Submission: 2024-09-10 02:33:41

Changing position

Time of First Successful Submission: 2024-09-10 02:35:44

Changing to an Absolute Path

Time of First Successful Submission: 2024-09-10 02:36:41

Relative Paths

Time of First Successful Submission: 2024-09-10 02:39:09

Cat

Time of First Successful Submission: 2024-09-14 20:46:31

Ls

Time of First Successful Submission: 2024-09-14 20:52:38

Ls All

Time of First Successful Submission: 2024-09-14 20:58:49

Find

Time of First Successful Submission: 2025-01-15 20:03:29

Piping Echo

Time of First Successful Submission: 2025-09-25 21:39:42

Piping Stdout

Time of First Successful Submission: 2025-09-25 21:40:50

Piping Stdin

Time of First Successful Submission: 2025-09-25 21:50:49

Intro to Cybersecurity

179 / 183 257 / 20597

Path Traversal 1

Time of First Successful Submission: 2025-01-11 04:42:22

Path Traversal 2

Time of First Successful Submission: 2026-02-06 22:50:55

CMDi 1

Time of First Successful Submission: 2025-01-15 22:49:36

CMDi 2

Time of First Successful Submission: 2025-01-15 22:51:32

CMDi 3

Time of First Successful Submission: 2025-01-15 22:55:39

CMDi 4

Time of First Successful Submission: 2025-01-15 22:47:44

CMDi 5

Time of First Successful Submission: 2026-02-02 19:33:51

CMDi 6

Time of First Successful Submission: 2026-02-17 07:47:20

Authentication Bypass 1

Time of First Successful Submission: 2025-08-24 20:15:31

Authentication Bypass 2

Time of First Successful Submission: 2025-08-24 20:30:44

SQLi 1

Time of First Successful Submission: 2025-08-24 21:39:16

SQLi 2

Time of First Successful Submission: 2025-08-24 21:50:31

SQLi 3

Time of First Successful Submission: 2025-08-24 22:11:45

SQLi 4

Time of First Successful Submission: 2025-08-24 23:51:06

SQLi 5

Time of First Successful Submission: 2025-08-25 00:40:47

XSS 1

Time of First Successful Submission: 2026-02-06 23:09:33

XSS 2

Time of First Successful Submission: 2026-02-06 23:21:14

XSS 3

Time of First Successful Submission: 2026-02-07 18:43:56

XSS 4

Time of First Successful Submission: 2026-02-10 00:21:19

XSS 5

Time of First Successful Submission: 2026-02-10 00:33:10

XSS 6

Time of First Successful Submission: 2026-02-10 00:49:32

XSS 7

Time of First Successful Submission: 2026-02-12 04:05:58

CSRF 1

Time of First Successful Submission: 2026-02-14 02:29:38

CSRF 2

Time of First Successful Submission: 2026-02-14 18:31:31

CSRF 3

Time of First Successful Submission: 2026-02-14 19:58:50

CSRF 4

Time of First Successful Submission: 2026-02-14 20:02:07

CSRF 5

Time of First Successful Submission: 2026-02-14 20:17:41

Connect

Time of First Successful Submission: 2024-12-31 13:33:19

Send

Time of First Successful Submission: 2026-04-07 01:46:36

Shutdown

Time of First Successful Submission: 2026-04-07 01:46:47

Listen

Time of First Successful Submission: 2024-12-31 13:34:05

Scan 1

Time of First Successful Submission: 2025-01-02 08:23:09

Scan 2

Time of First Successful Submission: 2025-01-02 08:45:34

Monitor 1

Time of First Successful Submission: 2025-01-02 10:08:30

Monitor 2

Time of First Successful Submission: 2026-04-11 00:25:33

Sniffing Cookies

Time of First Successful Submission: 2026-04-11 00:29:59

Network Configuration

Time of First Successful Submission: 2026-04-11 00:32:12

Firewall 1

Time of First Successful Submission: 2026-04-11 00:34:20

Firewall 2

Time of First Successful Submission: 2026-04-11 00:35:19

Firewall 3

Time of First Successful Submission: 2026-04-11 00:38:10

Denial of Service 1

Time of First Successful Submission: 2026-04-11 00:48:08

Denial of Service 2

Time of First Successful Submission: 2026-04-11 00:50:16

Denial of Service 3

Time of First Successful Submission: 2026-04-11 00:52:26

Ethernet

Time of First Successful Submission: 2026-04-11 01:14:40

IP

Time of First Successful Submission: 2026-04-11 01:16:32

TCP

Time of First Successful Submission: 2026-04-11 01:18:20

TCP Handshake

Time of First Successful Submission: 2026-04-11 01:19:40

UDP

Time of First Successful Submission: 2026-04-11 01:21:29

UDP 2

Time of First Successful Submission: 2026-04-11 01:25:57

UDP Spoofing 1

Time of First Successful Submission: 2026-04-11 01:27:26

UDP Spoofing 2

Time of First Successful Submission: 2026-04-12 18:27:51

UDP Spoofing 3

Time of First Successful Submission: 2026-04-12 18:30:56

UDP Spoofing 4

Time of First Successful Submission: 2026-04-12 19:09:13

ARP

Time of First Successful Submission: 2026-04-12 19:13:07

Intercept

Time of First Successful Submission: 2026-04-12 19:34:09

Man-in-the-Middle

Time of First Successful Submission: 2026-04-12 22:27:26

XOR

Time of First Successful Submission: 2024-11-07 17:08:07

XORing Hex

Time of First Successful Submission: 2024-12-28 13:49:38

XORing ASCII

Time of First Successful Submission: 2024-12-28 14:28:51

XORing ASCII Strings

Time of First Successful Submission: 2024-12-28 14:47:39

One-time Pad

Time of First Successful Submission: 2024-12-29 03:58:53

One-time Pad Tampering

Time of First Successful Submission: 2025-09-26 03:28:34

Many-time Pad

Time of First Successful Submission: 2024-12-30 16:22:45

AES

Time of First Successful Submission: 2024-12-30 17:20:04

AES-ECB-CPA

Time of First Successful Submission: 2025-01-09 07:32:59

AES-ECB-CPA-HTTP

Time of First Successful Submission: 2025-09-26 07:54:47

AES-ECB-CPA-HTTP (base64)

Time of First Successful Submission: 2025-09-28 19:09:16

AES-ECB-CPA-Suffix

Time of First Successful Submission: 2026-04-21 23:38:15

AES-ECB-CPA-Prefix

Time of First Successful Submission: 2025-03-24 04:50:03

AES-ECB-CPA-Prefix-2

Time of First Successful Submission: 2025-03-25 19:26:01

AES-ECB-CPA-Prefix-Miniboss

Time of First Successful Submission: 2025-03-24 01:11:48

AES-ECB-CPA-Prefix-Boss

Time of First Successful Submission: 2026-04-22 00:02:57

AES-CBC

Time of First Successful Submission: 2026-04-22 01:21:33

AES-CBC Tampering

Time of First Successful Submission: 2026-04-22 01:30:56

AES-CBC Resizing

Time of First Successful Submission: 2026-04-22 01:38:24

AES-CBC-POA-Partial-Block

Time of First Successful Submission: 2026-04-23 01:53:57

AES-CBC-POA-Full-Block

Time of First Successful Submission: 2026-04-23 04:15:31

AES-CBC-POA-Multi-Block

Time of First Successful Submission: 2026-04-23 04:42:26

AES-CBC-POA-Encrypt

Time of First Successful Submission: 2026-04-23 20:24:23

AES-CBC-POA-Encrypt-2

Time of First Successful Submission: 2026-04-23 20:25:06

DHKE

Time of First Successful Submission: 2025-01-09 13:05:15

DHKE-to-AES

Time of First Successful Submission: 2026-04-24 21:59:12

RSA 1

Time of First Successful Submission: 2026-02-18 00:21:45

RSA 2

Time of First Successful Submission: 2026-02-18 07:22:30

RSA 3

Time of First Successful Submission: 2026-04-24 22:02:40

RSA 4

Time of First Successful Submission: 2026-04-24 22:04:58

RSA Signatures

Time of First Successful Submission: 2026-04-24 22:09:37

SHA 1

Time of First Successful Submission: 2025-05-04 22:32:47

SHA 2

Time of First Successful Submission: 2026-04-17 04:01:01

TLS 1

Time of First Successful Submission: 2026-04-17 05:17:58

TLS 2

Time of First Successful Submission: 2026-04-24 22:17:28

level1

Time of First Successful Submission: 2024-12-30 17:26:36

level2

Time of First Successful Submission: 2024-12-30 17:27:36

level3

Time of First Successful Submission: 2024-12-30 17:29:38

level4

Time of First Successful Submission: 2024-12-30 17:36:11

level5

Time of First Successful Submission: 2024-12-30 17:42:41

level6

Time of First Successful Submission: 2024-12-30 17:48:25

level7

Time of First Successful Submission: 2024-12-30 17:49:49

level8

Time of First Successful Submission: 2024-12-30 17:54:59

level9

Time of First Successful Submission: 2024-12-30 18:12:45

level10

Time of First Successful Submission: 2024-12-30 18:16:36

level11

Time of First Successful Submission: 2024-12-31 03:39:46

level12

Time of First Successful Submission: 2024-12-31 03:49:25

level13

Time of First Successful Submission: 2024-12-31 03:55:16

level14

Time of First Successful Submission: 2024-12-31 03:56:34

level15

Time of First Successful Submission: 2024-12-31 03:57:46

level16

Time of First Successful Submission: 2024-12-31 03:59:22

level17

Time of First Successful Submission: 2025-01-05 09:44:36

level18

Time of First Successful Submission: 2025-01-05 11:40:44

level19

Time of First Successful Submission: 2025-01-05 12:33:34

File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2025-08-20 17:15:34

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2025-08-20 17:18:43

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2025-08-20 17:19:39

Reading Endianness (Python)

Time of First Successful Submission: 2025-08-20 17:23:27

Reading Endianness (C)

Time of First Successful Submission: 2025-08-20 17:33:24

Reading Endianness (x86)

Time of First Successful Submission: 2025-08-20 18:12:39

Version Information (Python)

Time of First Successful Submission: 2026-03-06 00:34:08

Version Information (C)

Time of First Successful Submission: 2026-03-06 00:44:37

Version Information (x86)

Time of First Successful Submission: 2025-08-21 21:26:08

Metadata and Data (Python)

Time of First Successful Submission: 2026-03-06 00:56:52

Metadata and Data (C)

Time of First Successful Submission: 2026-03-06 01:06:09

Metadata and Data (x86)

Time of First Successful Submission: 2026-03-06 01:19:24

Input Restrictions (Python)

Time of First Successful Submission: 2026-03-06 03:06:01

Input Restrictions (C)

Time of First Successful Submission: 2026-03-06 03:15:06

Input Restrictions (x86)

Time of First Successful Submission: 2026-03-06 03:18:54

Behold the cIMG! (Python)

Time of First Successful Submission: 2026-03-06 03:23:55

Behold the cIMG! (C)

Time of First Successful Submission: 2026-03-06 03:26:31

Behold the cIMG! (x86)

Time of First Successful Submission: 2026-03-06 04:50:15

A Basic cIMG (Python)

Time of First Successful Submission: 2026-03-06 05:00:52

A Basic cIMG (C)

Time of First Successful Submission: 2026-03-06 05:05:40

A Basic cIMG (x86)

Time of First Successful Submission: 2026-03-06 05:08:44

Internal State Mini (C)

Time of First Successful Submission: 2026-03-07 18:51:34

Internal State Mini (x86)

Time of First Successful Submission: 2026-03-08 18:20:55

Internal State (C)

Time of First Successful Submission: 2026-03-08 17:06:15

Internal State (x86)

Time of First Successful Submission: 2026-03-08 18:02:02

File Formats: Directives (C)

Time of First Successful Submission: 2026-03-08 17:49:42

File Formats: Directives (x86)

Time of First Successful Submission: 2026-03-08 17:54:36

The Patch Directive

Time of First Successful Submission: 2026-03-10 02:22:14

Optimizing for Space

Time of First Successful Submission: 2026-03-17 02:01:29

Tweaking Images

Time of First Successful Submission: 2026-03-11 17:01:01

Storage and Retrieval

Time of First Successful Submission: 2026-03-17 02:22:25

Extracting Knowledge

Time of First Successful Submission: 2026-03-11 17:05:55

Advanced Sprites

Time of First Successful Submission: 2026-03-17 02:30:33

Accessing Resources

Time of First Successful Submission: 2026-03-15 02:26:25

Unsafe Animations

Time of First Successful Submission: 2026-03-16 00:58:27

Animations

Time of First Successful Submission: 2026-03-16 01:57:04

Interoperability: Patching Data

Time of First Successful Submission: 2026-03-12 02:12:19

Patching Code

Time of First Successful Submission: 2026-03-12 07:43:30

Patching Control Flow

Time of First Successful Submission: 2026-03-12 17:38:13

Your First Overflow (easy)

Time of First Successful Submission: 2024-12-31 13:26:25

Your First Overflow (hard)

Time of First Successful Submission: 2024-12-31 13:28:40

Precision (easy)

Time of First Successful Submission: 2026-03-17 17:59:30

Precision (hard)

Time of First Successful Submission: 2026-03-24 18:30:25

Variable Control (easy)

Time of First Successful Submission: 2026-03-24 18:44:34

Variable Control (hard)

Time of First Successful Submission: 2026-03-24 18:55:57

Control Hijack (easy)

Time of First Successful Submission: 2026-03-24 19:18:03

Control Hijack (hard)

Time of First Successful Submission: 2026-03-24 19:30:52

Tricky Control Hijack (easy)

Time of First Successful Submission: 2026-03-25 01:27:24

Tricky Control Hijack (hard)

Time of First Successful Submission: 2026-03-25 01:38:08

PIEs (easy)

Time of First Successful Submission: 2026-03-26 19:09:53

PIEs (hard)

Time of First Successful Submission: 2026-03-26 19:17:42

String Lengths (easy)

Time of First Successful Submission: 2026-03-26 19:51:56

String Lengths (hard)

Time of First Successful Submission: 2026-03-26 19:59:47

Basic Shellcode

Time of First Successful Submission: 2026-03-31 23:51:46

NOP Sleds

Time of First Successful Submission: 2026-03-31 23:54:54

NULL-Free Shellcode

Time of First Successful Submission: 2026-04-01 00:03:06

Hijack to (Mapped) Shellcode (easy)

Time of First Successful Submission: 2026-04-01 00:31:00

Hijack to (Mapped) Shellcode (hard)

Time of First Successful Submission: 2026-04-01 00:32:52

Hijack to Shellcode (easy)

Time of First Successful Submission: 2026-04-02 21:07:28

Hijack to Shellcode (hard)

Time of First Successful Submission: 2026-04-02 21:19:14

ECB-to-Win (easy)

Time of First Successful Submission: 2026-04-13 04:05:35

ECB-to-Win (hard)

Time of First Successful Submission: 2026-04-13 04:14:55

ECB-to-Shellcode (easy)

Time of First Successful Submission: 2026-04-13 04:51:30

ECB-to-Shellcode (hard)

Time of First Successful Submission: 2026-04-13 07:03:57

CIMG Screenshots

Time of First Successful Submission: 2026-04-28 09:11:22

Wily Webserver

Time of First Successful Submission: 2026-04-14 01:31:30

The Watering Hole

Time of First Successful Submission: 2026-04-14 01:55:05

Secure Chat 1

Time of First Successful Submission: 2026-04-14 22:18:14

Secure Chat 2

Time of First Successful Submission: 2026-05-05 22:13:09

Program Security

5 / 162 7236 / 9793

ello ackers!

Time of First Successful Submission: 2026-04-27 02:43:16

Terrible Token (Easy)

Time of First Successful Submission: 2026-04-28 22:53:08

Terrible Token (Hard)

Time of First Successful Submission: 2026-04-28 23:01:16

Tangled Ticket (Easy)

Time of First Successful Submission: 2026-04-28 23:11:14

Tangled Ticket (Hard)

Time of First Successful Submission: 2026-04-28 23:41:24

Start Here

11 / 12 3685 / 45022

Using the Terminal

Time of First Successful Submission: 2025-08-25 16:07:19

Using the VSCode Workspace

Time of First Successful Submission: 2024-09-09 22:00:01

Using the GUI Desktop

Time of First Successful Submission: 2024-09-09 23:56:32

Pasting into the Desktop

Time of First Successful Submission: 2024-09-09 23:58:24

Restarting Challenges

Time of First Successful Submission: 2024-09-10 00:00:52

Challenge Programs

Time of First Successful Submission: 2024-09-10 00:04:42

The Flag File

Time of First Successful Submission: 2024-09-10 00:07:30

Using Privileged Mode

Time of First Successful Submission: 2024-09-10 00:11:14

Persistent Home Directories - One

Time of First Successful Submission: 2024-09-10 00:15:56

Persistent Home Directories - Two

Time of First Successful Submission: 2024-09-10 00:18:06

Linux Luminarium

128 / 128 1397 / 33680

Intro to Commands

Time of First Successful Submission: 2024-09-10 00:24:05

Intro to Arguments

Time of First Successful Submission: 2024-09-10 00:26:01

Command History

Time of First Successful Submission: 2025-08-25 16:07:47

The Root

Time of First Successful Submission: 2024-09-10 00:27:55

Program and absolute paths

Time of First Successful Submission: 2024-09-10 02:33:41

Position thy self

Time of First Successful Submission: 2024-09-10 02:35:44

Position elsewhere

Time of First Successful Submission: 2024-09-10 02:36:41

implicit relative paths, from /

Time of First Successful Submission: 2024-09-10 02:39:09

explicit relative paths, from /

Time of First Successful Submission: 2024-09-10 02:40:41

implicit relative path

Time of First Successful Submission: 2024-09-10 02:41:58

home sweet home

Time of First Successful Submission: 2024-09-10 02:45:52

cat: not the pet, but the command!

Time of First Successful Submission: 2024-09-14 20:46:31

catting absolute paths

Time of First Successful Submission: 2024-09-14 20:47:36

more catting practice

Time of First Successful Submission: 2024-09-14 20:48:22

grepping for a needle in a haystack

Time of First Successful Submission: 2024-09-14 20:49:57

comparing files

Time of First Successful Submission: 2025-08-25 16:09:26

listing files

Time of First Successful Submission: 2024-09-14 20:52:38

touching files

Time of First Successful Submission: 2024-09-14 20:54:43

removing files

Time of First Successful Submission: 2024-09-14 20:55:55

moving files

Time of First Successful Submission: 2025-08-25 16:10:26

copying files

Time of First Successful Submission: 2026-01-13 04:07:12

hidden files

Time of First Successful Submission: 2024-09-14 20:58:49

An Epic Filesystem Quest

Time of First Successful Submission: 2025-01-15 19:59:28

making directories

Time of First Successful Submission: 2025-01-15 20:01:51

finding files

Time of First Successful Submission: 2025-01-15 20:03:29

linking files

Time of First Successful Submission: 2025-09-25 21:33:29

Learning From Documentation

Time of First Successful Submission: 2025-10-14 22:10:57

Learning Complex Usage

Time of First Successful Submission: 2025-10-14 21:44:14

Reading Manuals

Time of First Successful Submission: 2025-10-14 21:51:49

Searching Manuals

Time of First Successful Submission: 2025-10-14 21:55:15

Searching For Manuals

Time of First Successful Submission: 2025-10-14 21:59:57

Helpful Programs

Time of First Successful Submission: 2025-10-14 22:01:48

Help for Builtins

Time of First Successful Submission: 2025-10-14 22:03:46

Matching with *

Time of First Successful Submission: 2025-10-14 22:12:39

Matching with ?

Time of First Successful Submission: 2025-10-14 22:13:29

Matching with []

Time of First Successful Submission: 2025-10-14 22:16:30

Matching paths with []

Time of First Successful Submission: 2025-10-14 22:17:25

Multiple globs

Time of First Successful Submission: 2025-10-14 22:18:57

Mixing globs

Time of First Successful Submission: 2025-10-14 22:24:57

Exclusionary globbing

Time of First Successful Submission: 2025-10-14 23:11:19

Tab completion

Time of First Successful Submission: 2025-10-14 22:34:55

Multiple options for tab completion

Time of First Successful Submission: 2025-10-14 23:16:39

Tab completion on commands

Time of First Successful Submission: 2025-10-14 23:17:19

Redirecting output

Time of First Successful Submission: 2025-09-25 21:39:42

Redirecting more output

Time of First Successful Submission: 2025-09-25 21:40:50

Appending output

Time of First Successful Submission: 2025-09-25 21:41:55

Redirecting errors

Time of First Successful Submission: 2025-09-25 21:44:17

Redirecting input

Time of First Successful Submission: 2025-09-25 21:50:49

Grepping stored results

Time of First Successful Submission: 2025-09-25 21:56:02

Grepping live output

Time of First Successful Submission: 2025-09-25 21:57:00

Grepping errors

Time of First Successful Submission: 2025-09-25 22:03:35

Filtering with grep -v

Time of First Successful Submission: 2025-09-25 22:04:47

Filtering with sed

Time of First Successful Submission: 2026-01-13 04:13:12

Duplicating piped data with tee

Time of First Successful Submission: 2025-09-25 22:07:48

Process substitution for input

Time of First Successful Submission: 2025-09-25 22:13:09

Writing to multiple programs

Time of First Successful Submission: 2025-09-25 22:23:30

Split-piping stderr and stdout

Time of First Successful Submission: 2025-09-25 22:28:44

Named pipes

Time of First Successful Submission: 2025-09-25 22:39:30

Printing Variables

Time of First Successful Submission: 2025-10-14 23:20:20

Setting Variables

Time of First Successful Submission: 2025-10-14 23:22:04

Multi-word Variables

Time of First Successful Submission: 2025-10-14 23:22:43

Exporting Variables

Time of First Successful Submission: 2025-10-16 20:55:12

Printing Exported Variables

Time of First Successful Submission: 2025-10-16 20:55:56

Storing Command Output

Time of First Successful Submission: 2025-11-11 03:49:23

Reading Input

Time of First Successful Submission: 2026-01-13 04:15:48

Reading Files

Time of First Successful Submission: 2026-01-13 04:16:59

Translating characters

Time of First Successful Submission: 2025-10-14 23:28:11

Deleting characters

Time of First Successful Submission: 2025-10-14 23:29:16

Deleting newlines

Time of First Successful Submission: 2025-10-14 23:31:08

Extracting the first lines with head

Time of First Successful Submission: 2025-10-14 23:32:51

Extracting specific sections of text

Time of First Successful Submission: 2025-10-14 23:58:49

Sorting data

Time of First Successful Submission: 2025-10-15 00:06:37

Listing Processes

Time of First Successful Submission: 2025-10-16 21:04:35

Killing Processes

Time of First Successful Submission: 2025-10-16 21:05:57

Interrupting Processes

Time of First Successful Submission: 2025-10-16 21:06:35

Killing Misbehaving Processes

Time of First Successful Submission: 2026-01-13 05:14:12

Suspending Processes

Time of First Successful Submission: 2026-01-13 13:32:43

Resuming Processes

Time of First Successful Submission: 2026-01-13 13:33:20

Backgrounding Processes

Time of First Successful Submission: 2026-01-13 13:34:28

Foregrounding Processes

Time of First Successful Submission: 2026-01-17 20:41:33

Starting Backgrounded Processes

Time of First Successful Submission: 2026-01-13 14:15:21

Process Exit Codes

Time of First Successful Submission: 2026-01-13 14:19:19

Becoming root with su

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Other users with su

Time of First Successful Submission: 2025-01-15 17:52:29

Cracking passwords

Time of First Successful Submission: 2025-01-15 18:03:26

Using sudo

Time of First Successful Submission: 2025-01-15 18:01:00

Changing File Ownership

Time of First Successful Submission: 2025-01-15 22:14:22

Groups and Files

Time of First Successful Submission: 2025-01-15 22:18:37

Fun With Groups Names

Time of First Successful Submission: 2025-01-15 22:21:34

Changing Permissions

Time of First Successful Submission: 2026-01-12 23:03:10

Executable Files

Time of First Successful Submission: 2026-01-12 23:04:06

Permission Tweaking Practice

Time of First Successful Submission: 2026-01-12 23:24:08

Permissions Setting Practice

Time of First Successful Submission: 2026-01-13 04:54:52

The SUID Bit

Time of First Successful Submission: 2026-01-13 05:09:12

Chaining with Semicolons

Time of First Successful Submission: 2025-01-30 20:57:20

Building on Success

Time of First Successful Submission: 2026-01-13 04:25:11

Handling Failure

Time of First Successful Submission: 2026-01-13 04:26:14

Your First Shell Script

Time of First Successful Submission: 2026-01-13 04:31:22

Redirecting Script Output

Time of First Successful Submission: 2026-01-17 20:47:15

Executable Shell Scripts

Time of First Successful Submission: 2026-01-15 17:48:58

Understanding Shebangs

Time of First Successful Submission: 2026-01-15 17:51:30

Scripting with Arguments

Time of First Successful Submission: 2026-01-16 20:16:51

Scripting with Conditionals

Time of First Successful Submission: 2026-01-16 20:22:30

Scripting with Default Cases

Time of First Successful Submission: 2026-01-16 20:24:14

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-01-16 20:29:50

Reading Shell Scripts

Time of First Successful Submission: 2026-01-16 20:39:49

Launching Screen

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Detaching and Attaching

Time of First Successful Submission: 2026-01-16 20:41:56

Finding Sessions

Time of First Successful Submission: 2026-01-16 20:43:44

Switching Windows

Time of First Successful Submission: 2026-01-16 20:44:49

Detaching and Attaching (tmux)

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Switching Windows (tmux)

Time of First Successful Submission: 2026-01-16 20:47:37

The PATH Variable

Time of First Successful Submission: 2026-01-13 14:53:03

Setting PATH

Time of First Successful Submission: 2026-01-16 20:49:17

Finding Commands

Time of First Successful Submission: 2026-01-16 20:51:09

Adding Commands

Time of First Successful Submission: 2026-01-16 21:16:30

Hijacking Commands

Time of First Successful Submission: 2026-01-16 21:30:52

Bashrc Backdoor

Time of First Successful Submission: 2026-01-16 21:36:25

Sniffing Input

Time of First Successful Submission: 2026-01-16 21:57:12

Overshared Directories

Time of First Successful Submission: 2026-01-17 20:19:36

Tricky Linking

Time of First Successful Submission: 2026-01-17 20:34:51

Sniffing Process Arguments

Time of First Successful Submission: 2026-01-17 20:36:35

Snooping on Configurations

Time of First Successful Submission: 2026-01-17 20:39:28

The Fork Bomb

Time of First Successful Submission: 2026-01-17 21:12:36

Disk-Space Doomsday

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rm -rf /

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Life after rm -rf /

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Finding meaning after rm -rf /

Time of First Successful Submission: 2026-01-13 14:46:48

Computing 101

94 / 94 129 / 22227

Your First Register

Time of First Successful Submission: 2026-02-19 21:27:08

Your First Syscall

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Exit Codes

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Building Executables

Time of First Successful Submission: 2026-02-19 21:34:26

Moving Between Registers

Time of First Successful Submission: 2026-02-19 21:39:26

Loading From Memory

Time of First Successful Submission: 2026-02-19 21:59:03

More Loading Practice

Time of First Successful Submission: 2026-02-19 23:39:01

Dereferencing Pointers

Time of First Successful Submission: 2026-02-20 02:24:19

Dereferencing Yourself

Time of First Successful Submission: 2026-02-20 02:27:49

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-20 02:29:47

Stored Addresses

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Double Dereference

Time of First Successful Submission: 2026-02-20 02:37:34

The Stack

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Stack Offsets

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Program Arguments on the Stack

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Popping From the Stack

Time of First Successful Submission: 2026-02-20 18:51:57

Disassembling Programs

Time of First Successful Submission: 2026-02-20 19:49:28

Tracing Syscalls

Time of First Successful Submission: 2025-10-22 18:10:05

Starting GDB

Time of First Successful Submission: 2025-10-22 18:11:07

Quitting GDB

Time of First Successful Submission: 2026-02-20 19:21:53

Starting Programs in GDB

Time of First Successful Submission: 2025-10-22 18:12:18

Disassembling in GDB

Time of First Successful Submission: 2026-02-20 19:50:35

Stepping Through Instructions

Time of First Successful Submission: 2026-02-20 19:51:54

Reading Register Values

Time of First Successful Submission: 2026-02-20 19:52:56

Popping Stack Values

Time of First Successful Submission: 2026-02-20 19:54:10

Examining Memory

Time of First Successful Submission: 2026-02-20 19:55:28

Examining Stack Pointers

Time of First Successful Submission: 2026-02-20 20:00:39

Cooperative Debugging

Time of First Successful Submission: 2026-02-20 20:45:43

Writing Output

Time of First Successful Submission: 2026-02-20 20:59:26

Chaining Syscalls

Time of First Successful Submission: 2026-02-20 21:03:23

Writing Strings

Time of First Successful Submission: 2026-02-20 21:04:23

Reading Data

Time of First Successful Submission: 2026-02-20 21:31:20

Opening Files

Time of First Successful Submission: 2026-02-20 21:53:24

Hardcoding the Filename

Time of First Successful Submission: 2026-02-20 22:05:57

Comparing Values

Time of First Successful Submission: 2026-02-21 00:10:22

Comparing Characters

Time of First Successful Submission: 2026-02-21 00:16:52

Conditional Control Flow

Time of First Successful Submission: 2026-02-21 00:23:08

Comparing Strings

Time of First Successful Submission: 2026-02-21 00:25:58

Reverse the Password

Time of First Successful Submission: 2026-02-21 00:31:34

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-21 01:13:57

Looping

Time of First Successful Submission: 2026-03-01 02:30:37

Reverse the Calculation

Time of First Successful Submission: 2026-02-21 01:34:51

Reverse the Reverse

Time of First Successful Submission: 2026-02-21 01:40:09

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-21 01:42:51

Loops on Data

Time of First Successful Submission: 2026-02-21 01:49:14

set-register

Time of First Successful Submission: 2026-02-21 18:03:28

set-multiple-registers

Time of First Successful Submission: 2026-02-21 18:05:35

add-to-register

Time of First Successful Submission: 2026-02-21 18:07:27

linear-equation-registers

Time of First Successful Submission: 2026-02-21 18:15:13

integer-division

Time of First Successful Submission: 2026-02-21 18:19:35

modulo-operation

Time of First Successful Submission: 2026-02-25 21:40:54

set-upper-byte

Time of First Successful Submission: 2026-02-25 21:42:25

efficient-modulo

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byte-extraction

Time of First Successful Submission: 2026-02-25 21:51:42

bitwise-and

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check-even

Time of First Successful Submission: 2026-02-25 22:06:24

memory-read

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memory-write

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memory-increment

Time of First Successful Submission: 2026-02-25 22:15:38

byte-access

Time of First Successful Submission: 2026-03-01 00:24:29

memory-size-access

Time of First Successful Submission: 2026-03-01 00:31:29

little-endian-write

Time of First Successful Submission: 2026-03-01 00:34:43

memory-sum

Time of First Successful Submission: 2026-03-01 00:52:15

stack-subtraction

Time of First Successful Submission: 2026-03-01 00:59:14

swap-stack-values

Time of First Successful Submission: 2026-03-01 01:03:10

average-stack-values

Time of First Successful Submission: 2026-03-01 01:24:24

absolute-jump

Time of First Successful Submission: 2026-03-01 01:28:05

relative-jump

Time of First Successful Submission: 2026-03-01 01:32:37

jump-trampoline

Time of First Successful Submission: 2026-03-01 02:12:43

conditional-jump

Time of First Successful Submission: 2026-03-01 02:17:01

indirect-jump

Time of First Successful Submission: 2026-03-01 02:18:42

average-loop

Time of First Successful Submission: 2026-03-01 02:20:27

count-non-zero

Time of First Successful Submission: 2026-03-01 02:22:04

string-lower

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most-common-byte

Time of First Successful Submission: 2026-03-01 02:28:18

Exit

Time of First Successful Submission: 2026-03-01 16:13:29

Socket

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Bind

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Listen

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Accept

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Static Response

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Dynamic Response

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Iterative GET Server

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Concurrent GET Server

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Concurrent POST Server

Time of First Successful Submission: 2026-03-01 19:20:33

Web Server

Time of First Successful Submission: 2026-03-01 19:22:33

Debugging Programs

Time of First Successful Submission: 2025-04-30 22:06:48

Inspecting Registers

Time of First Successful Submission: 2025-04-30 22:14:14

Examining Memory

Time of First Successful Submission: 2025-04-30 22:29:22

Setting Breakpoints

Time of First Successful Submission: 2025-04-30 23:03:29

GDB Scripting

Time of First Successful Submission: 2025-05-01 04:04:34

Modifying Data

Time of First Successful Submission: 2025-05-01 04:41:40

Modifying Execution

Time of First Successful Submission: 2025-06-04 08:53:59

Broken Functions

Time of First Successful Submission: 2026-03-01 04:42:09

Playing With Programs

116 / 116 914 / 23715

What's the password?

Time of First Successful Submission: 2025-01-27 01:54:57

... and again!

Time of First Successful Submission: 2025-01-27 01:57:02

Newline Troubles

Time of First Successful Submission: 2025-01-27 02:01:19

Reasoning about files

Time of First Successful Submission: 2025-01-27 02:15:51

Specifying Filenames

Time of First Successful Submission: 2025-01-27 02:20:10

Binary and Hex Encoding

Time of First Successful Submission: 2025-01-27 20:51:19

More Hex

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Decoding Hex

Time of First Successful Submission: 2025-01-27 21:00:35

Decoding Practice

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Encoding Practice

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Hex-encoding ASCII

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Nested Encoding

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Hex-encoding UTF-8

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UTF Mixups

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Modifying Encoded Data

Time of First Successful Submission: 2025-01-27 20:45:50

Decoding Base64

Time of First Successful Submission: 2024-11-07 16:41:33

Encoding Base64

Time of First Successful Submission: 2025-01-27 20:39:56

Dealing with Obfuscation

Time of First Successful Submission: 2025-01-27 02:27:57

Dealing with Obfuscation 2

Time of First Successful Submission: 2025-01-27 03:27:13

Your First HTTP Request

Time of First Successful Submission: 2026-01-21 00:24:06

Reading Flask

Time of First Successful Submission: 2026-01-21 00:25:35

Commented Data

Time of First Successful Submission: 2026-01-21 00:28:09

HTTP Metadata

Time of First Successful Submission: 2026-01-21 00:33:15

HTTP (netcat)

Time of First Successful Submission: 2024-11-01 01:20:55

HTTP Paths (netcat)

Time of First Successful Submission: 2025-01-06 12:21:36

HTTP (curl)

Time of First Successful Submission: 2025-01-06 12:17:49

HTTP (python)

Time of First Successful Submission: 2025-01-06 12:27:28

HTTP Host Header (python)

Time of First Successful Submission: 2024-11-07 16:35:12

HTTP Host Header (curl)

Time of First Successful Submission: 2024-11-07 16:30:00

HTTP Host Header (netcat)

Time of First Successful Submission: 2024-11-07 16:32:30

URL Encoding (netcat)

Time of First Successful Submission: 2025-01-06 12:33:47

HTTP GET Parameters

Time of First Successful Submission: 2025-01-06 12:36:40

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2025-01-06 12:48:52

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2025-01-06 12:45:41

HTTP Forms

Time of First Successful Submission: 2026-01-23 05:13:32

HTTP Forms (curl)

Time of First Successful Submission: 2025-01-06 17:32:30

HTTP Forms (netcat)

Time of First Successful Submission: 2026-01-23 05:16:44

HTTP Forms (python)

Time of First Successful Submission: 2025-01-06 17:55:14

HTTP Forms Without Forms

Time of First Successful Submission: 2026-01-23 05:19:20

Multiple Form Fields (curl)

Time of First Successful Submission: 2025-01-06 17:57:40

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-01-23 17:30:13

HTTP Redirects (netcat)

Time of First Successful Submission: 2025-01-07 06:35:34

HTTP Redirects (curl)

Time of First Successful Submission: 2025-01-07 06:29:39

HTTP Redirects (python)

Time of First Successful Submission: 2025-01-07 06:39:02

HTTP Cookies (curl)

Time of First Successful Submission: 2025-01-07 06:49:56

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-01-23 05:26:40

HTTP Cookies (python)

Time of First Successful Submission: 2025-01-07 07:07:58

Server State (python)

Time of First Successful Submission: 2025-01-07 07:09:21

Listening Web

Time of First Successful Submission: 2026-01-23 17:45:17

Speaking Redirects

Time of First Successful Submission: 2026-01-27 03:35:08

JavaScript Redirects

Time of First Successful Submission: 2026-01-28 18:43:35

Including JavaScript

Time of First Successful Submission: 2026-01-28 18:50:16

HTTP (javascript)

Time of First Successful Submission: 2026-01-28 18:53:07

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-01-28 19:23:55

HTTP Forms (javascript)

Time of First Successful Submission: 2026-01-28 19:32:22

cat

Time of First Successful Submission: 2026-03-16 21:26:45

more

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less

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tail

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head

Time of First Successful Submission: 2026-03-16 21:29:43

sort

Time of First Successful Submission: 2026-03-16 21:30:11

vim

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emacs

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nano

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rev

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od

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hd

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xxd

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base32

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base64

Time of First Successful Submission: 2026-03-17 23:37:59

split

Time of First Successful Submission: 2026-03-17 23:39:58

gzip

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bzip2

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zip

Time of First Successful Submission: 2026-03-17 23:43:03

tar

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ar

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cpio

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genisoimage

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env

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find

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make

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nice

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timeout

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stdbuf

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setarch

Time of First Successful Submission: 2026-03-18 00:05:44

watch

Time of First Successful Submission: 2026-05-06 04:18:44

socat

Time of First Successful Submission: 2026-03-18 00:08:24

whiptail

Time of First Successful Submission: 2026-05-06 04:19:57

awk

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sed

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ed

Time of First Successful Submission: 2026-05-06 04:21:38

chown

Time of First Successful Submission: 2026-04-23 04:51:48

chmod

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cp

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mv

Time of First Successful Submission: 2026-05-06 03:43:20

perl

Time of First Successful Submission: 2026-05-06 03:50:33

python

Time of First Successful Submission: 2026-05-06 03:51:33

ruby

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bash

Time of First Successful Submission: 2026-05-06 03:57:32

date

Time of First Successful Submission: 2026-05-06 03:58:54

dmesg

Time of First Successful Submission: 2026-05-06 03:59:23

wc

Time of First Successful Submission: 2026-05-06 04:00:03

gcc

Time of First Successful Submission: 2026-05-06 04:00:45

as

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wget

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ssh-keygen

Time of First Successful Submission: 2026-05-06 04:17:40

SQL Queries

Time of First Successful Submission: 2026-01-21 01:06:37

Filtering SQL

Time of First Successful Submission: 2026-01-21 01:21:47

Choosing Columns

Time of First Successful Submission: 2026-01-21 01:24:47

Exclusionary Filtering

Time of First Successful Submission: 2026-01-21 01:27:09

Filtering Strings

Time of First Successful Submission: 2026-01-21 01:28:57

Filtering on Expressions

Time of First Successful Submission: 2026-01-21 01:34:50

SELECTing Expressions

Time of First Successful Submission: 2026-01-21 01:55:06

Composite Conditions

Time of First Successful Submission: 2026-01-21 02:19:38

Reaching Your LIMITs

Time of First Successful Submission: 2026-01-21 02:25:03

Querying Metadata

Time of First Successful Submission: 2026-01-21 02:29:58

GCA CTF

11 / 104 3908 / 45307

Using the Terminal

Time of First Successful Submission: 2025-08-25 16:07:19

Using the VSCode Workspace

Time of First Successful Submission: 2024-09-09 22:00:01

Using the GUI Desktop

Time of First Successful Submission: 2024-09-09 23:56:32

Pasting into the Desktop

Time of First Successful Submission: 2024-09-09 23:58:24

Restarting Challenges

Time of First Successful Submission: 2024-09-10 00:00:52

Getting Help

Time of First Successful Submission: 2024-09-10 00:03:03

Challenge Programs

Time of First Successful Submission: 2024-09-10 00:04:42

The Flag File

Time of First Successful Submission: 2024-09-10 00:07:30

Using Privileged Mode

Time of First Successful Submission: 2024-09-10 00:11:14

Persistent Home Directories - One

Time of First Successful Submission: 2024-09-10 00:15:56

Persistent Home Directories - Two

Time of First Successful Submission: 2024-09-10 00:18:06

Pwntools Tutorials

12 / 12 347 / 1266

Level 0.0

Time of First Successful Submission: 2026-03-19 03:08:43

Level 1.0

Time of First Successful Submission: 2026-03-19 18:24:28

Level 1.1

Time of First Successful Submission: 2026-03-19 18:37:55

Level 2.0

Time of First Successful Submission: 2026-03-19 19:25:34

Level 2.1

Time of First Successful Submission: 2026-03-19 19:48:37

Level 2.2

Time of First Successful Submission: 2026-03-19 19:54:07

Level 2.3

Time of First Successful Submission: 2026-03-19 20:00:54

Level 2.4

Time of First Successful Submission: 2026-03-19 20:06:07

Level 2.5

Time of First Successful Submission: 2026-03-19 20:08:55

Level 2.6

Time of First Successful Submission: 2026-03-19 20:13:39

Level 3.0

Time of First Successful Submission: 2026-03-19 20:40:07

Level 4.0

Time of First Successful Submission: 2026-03-19 23:00:52