Rui Zhou

🐧 💻

Intro to Programming Languages

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Commands

Time of First Successful Submission: 2025-01-16 23:23:19

Command Arguments

Time of First Successful Submission: 2025-01-16 23:27:52

Command History

Time of First Successful Submission: 2025-06-08 09:39:53

The Root Path

Time of First Successful Submission: 2025-01-16 23:34:15

Absolute Paths

Time of First Successful Submission: 2025-01-16 23:35:11

Changing position

Time of First Successful Submission: 2025-01-16 23:37:12

Changing to an Absolute Path

Time of First Successful Submission: 2025-01-16 23:38:51

Relative Paths

Time of First Successful Submission: 2025-01-17 00:55:23

Cat

Time of First Successful Submission: 2025-01-26 16:31:57

Ls

Time of First Successful Submission: 2025-01-26 17:01:38

Ls All

Time of First Successful Submission: 2025-01-26 17:28:07

Find

Time of First Successful Submission: 2025-01-26 19:02:49

Piping Echo

Time of First Successful Submission: 2025-05-26 04:05:08

Piping Stdout

Time of First Successful Submission: 2025-05-26 04:45:53

Piping Stdin

Time of First Successful Submission: 2025-05-26 05:38:53


Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-02-08 17:09:42

Path Traversal 2

Time of First Successful Submission: 2026-02-08 17:17:23

CMDi 1

Time of First Successful Submission: 2026-02-08 17:45:53

CMDi 2

Time of First Successful Submission: 2026-02-08 18:05:48

CMDi 3

Time of First Successful Submission: 2026-02-08 19:23:20

CMDi 4

Time of First Successful Submission: 2026-02-08 19:50:38

CMDi 5

Time of First Successful Submission: 2026-02-08 19:57:43

Authentication Bypass 1

Time of First Successful Submission: 2026-02-08 20:00:10

Authentication Bypass 2

Time of First Successful Submission: 2026-02-08 20:01:02

SQLi 1

Time of First Successful Submission: 2026-02-08 20:03:35

SQLi 2

Time of First Successful Submission: 2026-02-08 20:05:03

SQLi 3

Time of First Successful Submission: 2026-02-08 20:08:22

SQLi 4

Time of First Successful Submission: 2026-02-08 21:08:33

SQLi 5

Time of First Successful Submission: 2026-02-08 21:12:24

XSS 1

Time of First Successful Submission: 2026-02-08 21:15:19

XSS 2

Time of First Successful Submission: 2026-02-08 21:16:44

XSS 3

Time of First Successful Submission: 2026-02-15 20:54:16

XSS 4

Time of First Successful Submission: 2026-02-15 20:55:55

XSS 5

Time of First Successful Submission: 2026-02-15 21:02:55

XSS 6

Time of First Successful Submission: 2026-02-15 21:07:35

XSS 7

Time of First Successful Submission: 2026-02-15 21:12:16

CSRF 1

Time of First Successful Submission: 2026-02-15 21:19:01

CSRF 2

Time of First Successful Submission: 2026-02-15 21:21:42

CSRF 3

Time of First Successful Submission: 2026-02-15 21:25:51

CSRF 4

Time of First Successful Submission: 2026-02-15 21:29:46

CSRF 5

Time of First Successful Submission: 2026-02-15 21:32:43

File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2026-03-04 20:31:55

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2026-03-04 20:47:28

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2026-03-04 21:24:36

Reading Endianness (Python)

Time of First Successful Submission: 2026-03-04 21:35:25

Reading Endianness (C)

Time of First Successful Submission: 2026-03-04 21:36:40

Reading Endianness (x86)

Time of First Successful Submission: 2026-03-04 21:40:42

Version Information (Python)

Time of First Successful Submission: 2026-03-04 21:44:06

Version Information (C)

Time of First Successful Submission: 2026-03-04 21:46:22

Version Information (x86)

Time of First Successful Submission: 2026-03-04 21:49:05

Metadata and Data (Python)

Time of First Successful Submission: 2026-03-04 21:51:13

Metadata and Data (C)

Time of First Successful Submission: 2026-03-04 21:54:23

Metadata and Data (x86)

Time of First Successful Submission: 2026-03-04 21:57:51

Input Restrictions (Python)

Time of First Successful Submission: 2026-03-04 22:38:28

Input Restrictions (C)

Time of First Successful Submission: 2026-03-04 22:42:55

Input Restrictions (x86)

Time of First Successful Submission: 2026-03-05 01:03:13

Behold the cIMG! (Python)

Time of First Successful Submission: 2026-03-05 01:04:56

Behold the cIMG! (C)

Time of First Successful Submission: 2026-03-05 01:08:45

Behold the cIMG! (x86)

Time of First Successful Submission: 2026-03-05 01:09:22

A Basic cIMG (Python)

Time of First Successful Submission: 2026-03-05 01:11:07

A Basic cIMG (C)

Time of First Successful Submission: 2026-03-05 01:14:09

A Basic cIMG (x86)

Time of First Successful Submission: 2026-03-05 01:16:27

Internal State Mini (C)

Time of First Successful Submission: 2026-03-23 21:59:01

Internal State Mini (x86)

Time of First Successful Submission: 2026-03-23 22:06:13

Internal State (C)

Time of First Successful Submission: 2026-03-23 22:23:25

Internal State (x86)

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

File Formats: Directives (C)

Time of First Successful Submission: 2026-03-23 23:07:41

File Formats: Directives (x86)

Time of First Successful Submission: 2026-03-23 23:15:19

The Patch Directive

Time of First Successful Submission: 2026-03-23 23:25:07

Optimizing for Space

Time of First Successful Submission: 2026-03-23 23:37:55

Tweaking Images

Time of First Successful Submission: 2026-03-24 00:30:29

Storage and Retrieval

Time of First Successful Submission: 2026-03-24 01:22:57

Extracting Knowledge

Time of First Successful Submission: 2026-03-24 01:44:27

Advanced Sprites

Time of First Successful Submission: 2026-03-24 02:15:19

Accessing Resources

Time of First Successful Submission: 2026-03-24 02:28:05

Unsafe Animations

Time of First Successful Submission: 2026-03-24 02:47:48

Animations

Time of First Successful Submission: 2026-03-24 04:16:41

Interoperability: Patching Data

Time of First Successful Submission: 2026-03-24 04:42:43

Patching Code

Time of First Successful Submission: 2026-03-24 05:55:58

Patching Control Flow

Time of First Successful Submission: 2026-03-24 06:07:10

Your First Overflow (easy)

Time of First Successful Submission: 2026-03-29 17:58:22

Your First Overflow (hard)

Time of First Successful Submission: 2026-03-29 18:01:06

Precision (easy)

Time of First Successful Submission: 2026-03-29 18:02:20

Precision (hard)

Time of First Successful Submission: 2026-03-29 18:08:44

Variable Control (easy)

Time of First Successful Submission: 2026-03-29 18:10:07

Variable Control (hard)

Time of First Successful Submission: 2026-03-29 18:13:23

Control Hijack (easy)

Time of First Successful Submission: 2026-03-29 18:23:35


Start Here

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Using the Terminal

Time of First Successful Submission: 2026-01-12 20:47:19

Using the VSCode Workspace

Time of First Successful Submission: 2025-01-15 01:01:10

Using the GUI Desktop

Time of First Successful Submission: 2025-01-15 01:04:21

Pasting into the Desktop

Time of First Successful Submission: 2025-01-15 01:06:03

Restarting Challenges

Time of First Successful Submission: 2025-01-15 01:09:12

Challenge Programs

Time of First Successful Submission: 2025-01-15 01:16:26

The Flag File

Time of First Successful Submission: 2025-01-15 01:19:21

Using Privileged Mode

Time of First Successful Submission: 2025-01-15 01:40:50

Persistent Home Directories - One

Time of First Successful Submission: 2025-01-16 23:17:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-01-16 23:19:56


Linux Luminarium

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Intro to Commands

Time of First Successful Submission: 2025-01-16 23:23:19

Intro to Arguments

Time of First Successful Submission: 2025-01-16 23:27:52

Command History

Time of First Successful Submission: 2025-06-08 09:39:53

The Root

Time of First Successful Submission: 2025-01-16 23:34:15

Program and absolute paths

Time of First Successful Submission: 2025-01-16 23:35:11

Position thy self

Time of First Successful Submission: 2025-01-16 23:37:12

Position elsewhere

Time of First Successful Submission: 2025-01-16 23:38:51

implicit relative paths, from /

Time of First Successful Submission: 2025-01-17 00:55:23

explicit relative paths, from /

Time of First Successful Submission: 2025-01-17 01:00:53

implicit relative path

Time of First Successful Submission: 2025-01-17 01:03:19

home sweet home

Time of First Successful Submission: 2025-01-20 04:29:11

cat: not the pet, but the command!

Time of First Successful Submission: 2025-01-26 16:31:57

catting absolute paths

Time of First Successful Submission: 2025-01-26 16:34:13

more catting practice

Time of First Successful Submission: 2025-01-26 16:55:34

grepping for a needle in a haystack

Time of First Successful Submission: 2025-01-26 17:00:05

comparing files

Time of First Successful Submission: 2026-01-12 21:31:08

listing files

Time of First Successful Submission: 2025-01-26 17:01:38

touching files

Time of First Successful Submission: 2025-01-26 17:07:05

removing files

Time of First Successful Submission: 2025-01-26 17:08:35

moving files

Time of First Successful Submission: 2025-06-08 10:59:52

copying files

Time of First Successful Submission: 2026-01-12 21:33:21

hidden files

Time of First Successful Submission: 2025-01-26 17:28:07

An Epic Filesystem Quest

Time of First Successful Submission: 2025-01-26 18:14:43

making directories

Time of First Successful Submission: 2025-01-26 18:20:07

finding files

Time of First Successful Submission: 2025-01-26 19:02:49

linking files

Time of First Successful Submission: 2025-01-26 19:37:00

Learning From Documentation

Time of First Successful Submission: 2025-01-26 19:41:50

Learning Complex Usage

Time of First Successful Submission: 2025-01-26 19:55:54

Reading Manuals

Time of First Successful Submission: 2025-01-26 20:09:40

Searching Manuals

Time of First Successful Submission: 2025-01-27 02:06:41

Searching For Manuals

Time of First Successful Submission: 2025-01-27 02:17:38

Helpful Programs

Time of First Successful Submission: 2025-01-27 02:38:14

Help for Builtins

Time of First Successful Submission: 2025-01-27 02:47:01

Matching with *

Time of First Successful Submission: 2025-05-26 02:51:26

Matching with ?

Time of First Successful Submission: 2025-05-26 02:58:08

Matching with []

Time of First Successful Submission: 2025-05-26 03:08:55

Matching paths with []

Time of First Successful Submission: 2025-05-26 03:20:48

Multiple globs

Time of First Successful Submission: 2025-06-08 10:02:36

Mixing globs

Time of First Successful Submission: 2025-05-26 03:53:50

Exclusionary globbing

Time of First Successful Submission: 2025-05-26 04:01:52

Tab completion

Time of First Successful Submission: 2025-06-08 10:04:06

Multiple options for tab completion

Time of First Successful Submission: 2025-06-08 10:54:27

Tab completion on commands

Time of First Successful Submission: 2025-06-08 10:57:06

Redirecting output

Time of First Successful Submission: 2025-05-26 04:05:08

Redirecting more output

Time of First Successful Submission: 2025-05-26 04:45:53

Appending output

Time of First Successful Submission: 2025-05-26 05:06:39

Redirecting errors

Time of First Successful Submission: 2025-05-26 05:34:19

Redirecting input

Time of First Successful Submission: 2025-05-26 05:38:53

Grepping stored results

Time of First Successful Submission: 2025-05-26 05:45:10

Grepping live output

Time of First Successful Submission: 2025-05-26 05:48:20

Grepping errors

Time of First Successful Submission: 2025-05-26 05:50:26

Filtering with grep -v

Time of First Successful Submission: 2025-06-08 11:03:31

Filtering with sed

Time of First Successful Submission: 2026-01-12 21:53:38

Duplicating piped data with tee

Time of First Successful Submission: 2025-05-26 06:06:09

Process substitution for input

Time of First Successful Submission: 2026-01-12 22:09:06

Writing to multiple programs

Time of First Successful Submission: 2025-05-26 06:24:06

Split-piping stderr and stdout

Time of First Successful Submission: 2025-05-26 07:24:28

Named pipes

Time of First Successful Submission: 2026-01-12 22:19:35

Printing Variables

Time of First Successful Submission: 2025-05-26 07:26:24

Setting Variables

Time of First Successful Submission: 2025-05-26 07:28:24

Multi-word Variables

Time of First Successful Submission: 2025-05-26 07:29:58

Exporting Variables

Time of First Successful Submission: 2025-05-26 07:39:12

Printing Exported Variables

Time of First Successful Submission: 2025-05-27 23:50:52

Storing Command Output

Time of First Successful Submission: 2025-05-27 23:53:59

Reading Input

Time of First Successful Submission: 2025-05-27 23:56:17

Reading Files

Time of First Successful Submission: 2025-05-28 00:00:35

Translating characters

Time of First Successful Submission: 2025-06-08 11:09:20

Deleting characters

Time of First Successful Submission: 2025-06-08 11:10:32

Deleting newlines

Time of First Successful Submission: 2025-06-08 11:12:48

Extracting the first lines with head

Time of First Successful Submission: 2025-06-08 11:16:09

Extracting specific sections of text

Time of First Successful Submission: 2025-06-08 11:24:15

Sorting data

Time of First Successful Submission: 2026-01-12 22:22:46

Listing Processes

Time of First Successful Submission: 2025-05-28 00:08:31

Killing Processes

Time of First Successful Submission: 2025-05-28 00:11:11

Interrupting Processes

Time of First Successful Submission: 2025-05-28 00:12:43

Killing Misbehaving Processes

Time of First Successful Submission: 2026-01-12 22:34:07

Suspending Processes

Time of First Successful Submission: 2025-05-28 00:14:15

Resuming Processes

Time of First Successful Submission: 2025-05-28 00:15:12

Backgrounding Processes

Time of First Successful Submission: 2025-05-28 00:18:47

Foregrounding Processes

Time of First Successful Submission: 2025-05-28 00:23:26

Starting Backgrounded Processes

Time of First Successful Submission: 2025-05-28 00:24:51

Process Exit Codes

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Becoming root with su

Time of First Successful Submission: 2025-06-16 00:12:50

Other users with su

Time of First Successful Submission: 2025-06-16 00:19:17

Cracking passwords

Time of First Successful Submission: 2025-06-16 00:25:08

Using sudo

Time of First Successful Submission: 2025-06-16 00:28:22

Changing File Ownership

Time of First Successful Submission: 2025-06-08 11:32:11

Groups and Files

Time of First Successful Submission: 2025-06-08 11:34:04

Fun With Groups Names

Time of First Successful Submission: 2025-06-08 12:19:31

Changing Permissions

Time of First Successful Submission: 2025-06-08 12:29:05

Executable Files

Time of First Successful Submission: 2025-06-08 12:33:14

Permission Tweaking Practice

Time of First Successful Submission: 2025-06-08 12:58:32

Permissions Setting Practice

Time of First Successful Submission: 2025-06-08 13:04:55

The SUID Bit

Time of First Successful Submission: 2025-06-08 13:09:09

Chaining with Semicolons

Time of First Successful Submission: 2025-06-16 00:31:06

Building on Success

Time of First Successful Submission: 2026-01-15 20:52:29

Handling Failure

Time of First Successful Submission: 2026-01-15 20:53:26

Your First Shell Script

Time of First Successful Submission: 2025-06-16 00:33:56

Redirecting Script Output

Time of First Successful Submission: 2025-06-16 00:35:22

Executable Shell Scripts

Time of First Successful Submission: 2025-06-16 00:37:06

Understanding Shebangs

Time of First Successful Submission: 2026-01-15 21:24:32

Scripting with Arguments

Time of First Successful Submission: 2026-01-16 01:02:49

Scripting with Conditionals

Time of First Successful Submission: 2026-01-16 01:12:28

Scripting with Default Cases

Time of First Successful Submission: 2026-01-16 01:13:42

Scripting with Multiple Conditions

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

Reading Shell Scripts

Time of First Successful Submission: 2026-01-16 01:21:40

Launching Screen

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

Detaching and Attaching

Time of First Successful Submission: 2026-01-16 01:25:18

Finding Sessions

Time of First Successful Submission: 2026-01-16 01:30:33

Switching Windows

Time of First Successful Submission: 2026-01-16 01:32:26

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-01-16 01:40:42

Switching Windows (tmux)

Time of First Successful Submission: 2026-01-16 01:41:46

The PATH Variable

Time of First Successful Submission: 2025-06-16 00:38:52

Setting PATH

Time of First Successful Submission: 2025-06-16 00:42:06

Finding Commands

Time of First Successful Submission: 2025-06-16 00:43:20

Adding Commands

Time of First Successful Submission: 2025-06-16 00:45:19

Hijacking Commands

Time of First Successful Submission: 2025-06-16 00:53:14

Bashrc Backdoor

Time of First Successful Submission: 2026-01-16 01:51:27

Sniffing Input

Time of First Successful Submission: 2026-01-16 03:26:48

Overshared Directories

Time of First Successful Submission: 2026-01-16 03:46:37

Tricky Linking

Time of First Successful Submission: 2026-01-16 04:19:06

Sniffing Process Arguments

Time of First Successful Submission: 2026-01-16 04:27:20

Snooping on Configurations

Time of First Successful Submission: 2026-01-16 04:33:25

The Fork Bomb

Time of First Successful Submission: 2026-01-16 05:17:48

Disk-Space Doomsday

Time of First Successful Submission: 2026-01-16 05:24:36

rm -rf /

Time of First Successful Submission: 2026-01-16 05:38:29

Life after rm -rf /

Time of First Successful Submission: 2026-01-16 05:48:57

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-01-16 06:03:57


Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-22 19:40:21

Your First Syscall

Time of First Successful Submission: 2026-02-22 19:41:32

Exit Codes

Time of First Successful Submission: 2026-02-22 19:42:14

Building Executables

Time of First Successful Submission: 2026-02-22 19:43:13

Moving Between Registers

Time of First Successful Submission: 2026-02-22 19:44:42

Loading From Memory

Time of First Successful Submission: 2026-02-19 01:30:52

More Loading Practice

Time of First Successful Submission: 2026-02-19 01:31:53

Dereferencing Pointers

Time of First Successful Submission: 2026-02-19 01:38:42

Dereferencing Yourself

Time of First Successful Submission: 2026-02-19 01:40:23

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-19 01:42:01

Stored Addresses

Time of First Successful Submission: 2026-02-19 01:46:51

Double Dereference

Time of First Successful Submission: 2026-02-19 01:50:17

The Stack

Time of First Successful Submission: 2026-02-19 01:52:57

Stack Offsets

Time of First Successful Submission: 2026-02-19 01:54:15

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-19 01:55:59

Popping From the Stack

Time of First Successful Submission: 2026-02-19 01:58:12

Disassembling Programs

Time of First Successful Submission: 2026-02-22 19:46:16

Tracing Syscalls

Time of First Successful Submission: 2026-02-22 19:47:17

Starting GDB

Time of First Successful Submission: 2026-02-22 19:48:21

Quitting GDB

Time of First Successful Submission: 2026-02-22 19:48:56

Starting Programs in GDB

Time of First Successful Submission: 2026-02-22 19:49:51

Disassembling in GDB

Time of First Successful Submission: 2026-02-22 19:50:59

Stepping Through Instructions

Time of First Successful Submission: 2026-02-22 19:51:43

Reading Register Values

Time of First Successful Submission: 2026-02-22 19:52:28

Popping Stack Values

Time of First Successful Submission: 2026-02-22 19:55:05

Examining Memory

Time of First Successful Submission: 2026-02-22 19:56:05

Examining Stack Pointers

Time of First Successful Submission: 2026-02-22 19:57:02

Cooperative Debugging

Time of First Successful Submission: 2026-02-22 19:58:47

Writing Output

Time of First Successful Submission: 2026-02-22 20:05:15

Chaining Syscalls

Time of First Successful Submission: 2026-02-22 20:05:59

Writing Strings

Time of First Successful Submission: 2026-02-22 20:06:56

Reading Data

Time of First Successful Submission: 2026-02-22 20:07:24

Opening Files

Time of First Successful Submission: 2026-02-22 20:08:07

Hardcoding the Filename

Time of First Successful Submission: 2026-02-22 20:08:36

Comparing Values

Time of First Successful Submission: 2026-02-22 20:20:51

Comparing Characters

Time of First Successful Submission: 2026-02-22 20:21:23

Conditional Control Flow

Time of First Successful Submission: 2026-02-22 20:21:47

Comparing Strings

Time of First Successful Submission: 2026-02-22 20:22:28

Reverse the Password

Time of First Successful Submission: 2026-02-22 20:23:29

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-22 20:28:03

Looping

Time of First Successful Submission: 2026-02-22 20:35:02

Reverse the Calculation

Time of First Successful Submission: 2026-02-22 20:36:39

Reverse the Reverse

Time of First Successful Submission: 2026-02-22 20:38:58

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-22 20:39:49

Loops on Data

Time of First Successful Submission: 2026-02-22 20:40:40

set-register

Time of First Successful Submission: 2026-02-22 20:53:59

set-multiple-registers

Time of First Successful Submission: 2026-02-22 20:54:58

add-to-register

Time of First Successful Submission: 2026-02-22 20:55:41

linear-equation-registers

Time of First Successful Submission: 2026-02-22 20:56:30

integer-division

Time of First Successful Submission: 2026-02-22 20:57:42

modulo-operation

Time of First Successful Submission: 2026-02-22 20:58:03

set-upper-byte

Time of First Successful Submission: 2026-02-22 20:58:38

efficient-modulo

Time of First Successful Submission: 2026-02-22 20:59:29

byte-extraction

Time of First Successful Submission: 2026-02-22 20:59:57

bitwise-and

Time of First Successful Submission: 2026-02-22 21:00:31

check-even

Time of First Successful Submission: 2026-02-22 21:01:18

memory-read

Time of First Successful Submission: 2026-02-22 21:01:47

memory-write

Time of First Successful Submission: 2026-02-22 21:02:16

memory-increment

Time of First Successful Submission: 2026-02-22 21:02:49

byte-access

Time of First Successful Submission: 2026-02-22 21:03:17

memory-size-access

Time of First Successful Submission: 2026-02-22 21:03:43

little-endian-write

Time of First Successful Submission: 2026-02-22 21:04:15

memory-sum

Time of First Successful Submission: 2026-02-22 21:04:40

stack-subtraction

Time of First Successful Submission: 2026-02-22 21:05:10

swap-stack-values

Time of First Successful Submission: 2026-02-22 21:05:38

average-stack-values

Time of First Successful Submission: 2026-02-22 21:06:03

absolute-jump

Time of First Successful Submission: 2026-02-22 21:06:30

relative-jump

Time of First Successful Submission: 2026-02-22 21:07:02

jump-trampoline

Time of First Successful Submission: 2026-02-22 21:07:32

conditional-jump

Time of First Successful Submission: 2026-02-22 21:21:05

indirect-jump

Time of First Successful Submission: 2026-02-22 21:22:14

average-loop

Time of First Successful Submission: 2026-02-22 22:07:48

count-non-zero

Time of First Successful Submission: 2026-02-22 22:08:34

string-lower

Time of First Successful Submission: 2026-02-22 22:09:52

most-common-byte

Time of First Successful Submission: 2026-02-22 22:13:02

Exit

Time of First Successful Submission: 2026-02-27 03:58:15

Socket

Time of First Successful Submission: 2026-02-27 03:59:06

Bind

Time of First Successful Submission: 2026-02-27 04:00:04

Listen

Time of First Successful Submission: 2026-02-27 04:00:57

Accept

Time of First Successful Submission: 2026-02-27 04:01:46

Static Response

Time of First Successful Submission: 2026-02-27 04:03:51

Dynamic Response

Time of First Successful Submission: 2026-02-27 04:06:49

Iterative GET Server

Time of First Successful Submission: 2026-02-27 04:09:27

Concurrent GET Server

Time of First Successful Submission: 2026-02-27 04:10:35

Concurrent POST Server

Time of First Successful Submission: 2026-02-27 04:16:24

Web Server

Time of First Successful Submission: 2026-02-27 04:21:47

Debugging Programs

Time of First Successful Submission: 2026-02-22 22:51:04

Inspecting Registers

Time of First Successful Submission: 2026-02-25 20:27:08

Examining Memory

Time of First Successful Submission: 2026-02-25 20:43:38

Setting Breakpoints

Time of First Successful Submission: 2026-02-25 21:17:46

GDB Scripting

Time of First Successful Submission: 2026-02-27 01:35:18

Modifying Data

Time of First Successful Submission: 2026-02-27 03:49:43

Modifying Execution

Time of First Successful Submission: 2026-02-27 03:53:00

Broken Functions

Time of First Successful Submission: 2026-02-27 03:56:23


Playing With Programs

65 / 116 4288 / 23386


What's the password?

Time of First Successful Submission: 2026-01-20 17:26:37

... and again!

Time of First Successful Submission: 2026-01-20 17:27:40

Newline Troubles

Time of First Successful Submission: 2026-01-20 17:38:00

Reasoning about files

Time of First Successful Submission: 2026-01-20 17:49:40

Specifying Filenames

Time of First Successful Submission: 2026-01-20 17:55:55

Binary and Hex Encoding

Time of First Successful Submission: 2026-01-20 18:13:49

More Hex

Time of First Successful Submission: 2026-01-20 18:16:49

Decoding Hex

Time of First Successful Submission: 2026-01-20 18:28:18

Decoding Practice

Time of First Successful Submission: 2026-01-20 18:50:22

Encoding Practice

Time of First Successful Submission: 2026-01-20 21:31:41

Hex-encoding ASCII

Time of First Successful Submission: 2026-01-20 21:38:32

Nested Encoding

Time of First Successful Submission: 2026-01-20 21:48:51

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-21 03:55:57

UTF Mixups

Time of First Successful Submission: 2026-01-21 20:27:10

Modifying Encoded Data

Time of First Successful Submission: 2026-01-21 20:52:00

Decoding Base64

Time of First Successful Submission: 2026-01-21 21:14:23

Encoding Base64

Time of First Successful Submission: 2026-01-21 21:20:03

Dealing with Obfuscation

Time of First Successful Submission: 2026-01-21 21:48:22

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-21 21:51:20

Your First HTTP Request

Time of First Successful Submission: 2026-01-22 17:07:16

Reading Flask

Time of First Successful Submission: 2026-01-22 17:51:15

Commented Data

Time of First Successful Submission: 2026-01-22 18:16:27

HTTP Metadata

Time of First Successful Submission: 2026-01-22 18:19:27

HTTP (netcat)

Time of First Successful Submission: 2026-01-22 18:22:34

HTTP Paths (netcat)

Time of First Successful Submission: 2026-01-22 18:29:19

HTTP (curl)

Time of First Successful Submission: 2026-01-26 04:08:46

HTTP (python)

Time of First Successful Submission: 2026-01-26 04:09:59

HTTP Host Header (python)

Time of First Successful Submission: 2026-01-27 03:49:39

HTTP Host Header (curl)

Time of First Successful Submission: 2026-01-27 03:52:13

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-01-27 03:57:59

URL Encoding (netcat)

Time of First Successful Submission: 2026-01-27 04:05:55

HTTP GET Parameters

Time of First Successful Submission: 2026-01-27 04:08:09

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-01-27 04:16:02

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-01-27 04:20:23

HTTP Forms

Time of First Successful Submission: 2026-01-27 04:21:30

HTTP Forms (curl)

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

HTTP Forms (netcat)

Time of First Successful Submission: 2026-01-27 04:27:33

HTTP Forms (python)

Time of First Successful Submission: 2026-01-27 04:28:49

HTTP Forms Without Forms

Time of First Successful Submission: 2026-01-27 04:30:48

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-01-27 04:31:52

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-01-27 04:33:58

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-01-27 04:36:32

HTTP Redirects (curl)

Time of First Successful Submission: 2026-01-27 04:38:06

HTTP Redirects (python)

Time of First Successful Submission: 2026-01-27 04:39:24

HTTP Cookies (curl)

Time of First Successful Submission: 2026-01-27 04:43:03

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-01-27 04:45:39

HTTP Cookies (python)

Time of First Successful Submission: 2026-01-27 04:47:09

Server State (python)

Time of First Successful Submission: 2026-01-27 04:50:49

Listening Web

Time of First Successful Submission: 2026-01-27 04:56:40

Speaking Redirects

Time of First Successful Submission: 2026-01-27 05:20:27

JavaScript Redirects

Time of First Successful Submission: 2026-01-27 05:25:31

Including JavaScript

Time of First Successful Submission: 2026-01-27 05:30:01

HTTP (javascript)

Time of First Successful Submission: 2026-01-29 01:35:16

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-01-29 03:29:54

HTTP Forms (javascript)

Time of First Successful Submission: 2026-01-29 03:33:11

SQL Queries

Time of First Successful Submission: 2026-02-02 00:36:45

Filtering SQL

Time of First Successful Submission: 2026-02-02 00:37:38

Choosing Columns

Time of First Successful Submission: 2026-02-02 00:38:24

Exclusionary Filtering

Time of First Successful Submission: 2026-02-02 00:39:36

Filtering Strings

Time of First Successful Submission: 2026-02-02 00:40:22

Filtering on Expressions

Time of First Successful Submission: 2026-02-02 00:41:15

SELECTing Expressions

Time of First Successful Submission: 2026-02-02 00:49:42

Composite Conditions

Time of First Successful Submission: 2026-02-02 00:51:40

Reaching Your LIMITs

Time of First Successful Submission: 2026-02-02 00:53:50

Querying Metadata

Time of First Successful Submission: 2026-02-02 00:57:42


GCA CTF

11 / 104 7864 / 43656


Using the Terminal

Time of First Successful Submission: 2026-01-12 20:47:19

Using the VSCode Workspace

Time of First Successful Submission: 2025-01-15 01:01:10

Using the GUI Desktop

Time of First Successful Submission: 2025-01-15 01:04:21

Pasting into the Desktop

Time of First Successful Submission: 2025-01-15 01:06:03

Restarting Challenges

Time of First Successful Submission: 2025-01-15 01:09:12

Getting Help

Time of First Successful Submission: 2025-01-15 01:13:39

Challenge Programs

Time of First Successful Submission: 2025-01-15 01:16:26

The Flag File

Time of First Successful Submission: 2025-01-15 01:19:21

Using Privileged Mode

Time of First Successful Submission: 2025-01-15 01:40:50

Persistent Home Directories - One

Time of First Successful Submission: 2025-01-16 23:17:50

Persistent Home Directories - Two

Time of First Successful Submission: 2025-01-16 23:19:56