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1 / 202 21510 / 22748

Triple Dereference

Time of First Successful Submission: 2025-11-20 13:24:12

Intro to Cybersecurity

26 / 183 8611 / 19003

Man-in-the-Middle

Time of First Successful Submission: 2026-02-02 17:32:12

File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2025-11-17 17:24:08

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2025-11-17 17:59:20

Behold the cIMG! (Python)

Time of First Successful Submission: 2025-11-17 20:59:13

Behold the cIMG! (x86)

Time of First Successful Submission: 2025-12-01 21:15:46

Your First Overflow (easy)

Time of First Successful Submission: 2025-12-15 15:10:04

Your First Overflow (hard)

Time of First Successful Submission: 2025-12-15 15:16:53

Precision (easy)

Time of First Successful Submission: 2025-12-15 16:27:17

Precision (hard)

Time of First Successful Submission: 2025-12-15 17:09:46

Variable Control (easy)

Time of First Successful Submission: 2025-12-15 18:28:20

Variable Control (hard)

Time of First Successful Submission: 2025-12-15 18:46:06

Control Hijack (easy)

Time of First Successful Submission: 2025-12-15 19:03:44

Control Hijack (hard)

Time of First Successful Submission: 2025-12-15 19:21:18

Tricky Control Hijack (easy)

Time of First Successful Submission: 2025-12-15 20:09:13

Tricky Control Hijack (hard)

Time of First Successful Submission: 2025-12-15 20:53:50

PIEs (easy)

Time of First Successful Submission: 2026-01-20 19:23:34

PIEs (hard)

Time of First Successful Submission: 2026-01-20 19:31:43

String Lengths (easy)

Time of First Successful Submission: 2026-01-21 00:18:10

String Lengths (hard)

Time of First Successful Submission: 2026-01-21 00:23:47

Basic Shellcode

Time of First Successful Submission: 2026-01-24 16:48:57

NOP Sleds

Time of First Successful Submission: 2026-01-24 17:28:40

NULL-Free Shellcode

Time of First Successful Submission: 2026-01-24 18:46:53

Hijack to (Mapped) Shellcode (easy)

Time of First Successful Submission: 2026-01-25 21:46:08

Hijack to (Mapped) Shellcode (hard)

Time of First Successful Submission: 2026-01-25 22:00:55

Hijack to Shellcode (easy)

Time of First Successful Submission: 2026-01-25 23:31:22

Hijack to Shellcode (hard)

Time of First Successful Submission: 2026-01-26 00:00:02

Program Security

7 / 162 5910 / 9220

Loose Link (Easy)

Time of First Successful Submission: 2026-01-22 17:24:47

Loose Link (Hard)

Time of First Successful Submission: 2026-01-22 17:32:15

Call Chain (Easy)

Time of First Successful Submission: 2026-01-22 17:40:16

Call Chain (Hard)

Time of First Successful Submission: 2026-01-22 17:43:30

Chain of Command (Easy)

Time of First Successful Submission: 2026-01-22 18:48:17

Chain of Command (Hard)

Time of First Successful Submission: 2026-01-22 18:58:52

Leaky Libc (Easy)

Time of First Successful Submission: 2026-01-22 21:35:15

Start Here

2 / 12 35968 / 40267

Pasting into the Desktop

Time of First Successful Submission: 2025-11-17 18:12:21

Computing 101

62 / 94 2536 / 20152

Your First Register

Time of First Successful Submission: 2025-11-20 10:04:15

Your First Syscall

Time of First Successful Submission: 2025-11-20 10:17:26

Exit Codes

Time of First Successful Submission: 2025-11-20 10:20:46

Building Executables

Time of First Successful Submission: 2025-11-20 10:36:43

Moving Between Registers

Time of First Successful Submission: 2025-11-20 10:44:32

Loading From Memory

Time of First Successful Submission: 2025-11-20 12:12:04

More Loading Practice

Time of First Successful Submission: 2025-11-20 12:13:14

Dereferencing Pointers

Time of First Successful Submission: 2025-11-20 12:24:49

Dereferencing Yourself

Time of First Successful Submission: 2025-11-20 12:38:59

Dereferencing with Offsets

Time of First Successful Submission: 2025-11-20 12:47:30

Stored Addresses

Time of First Successful Submission: 2025-11-20 13:11:22

Double Dereference

Time of First Successful Submission: 2025-11-20 13:22:06

Tracing Syscalls

Time of First Successful Submission: 2025-11-16 23:41:43

Starting GDB

Time of First Successful Submission: 2025-11-16 23:44:21

Starting Programs in GDB

Time of First Successful Submission: 2025-11-16 23:45:54

Writing Output

Time of First Successful Submission: 2025-11-20 13:57:24

Chaining Syscalls

Time of First Successful Submission: 2025-11-20 14:01:50

Writing Strings

Time of First Successful Submission: 2025-11-20 14:04:21

Reading Data

Time of First Successful Submission: 2025-11-20 14:26:56

set-register

Time of First Successful Submission: 2025-11-11 18:05:52

set-multiple-registers

Time of First Successful Submission: 2025-11-11 18:51:33

add-to-register

Time of First Successful Submission: 2025-11-11 18:55:21

linear-equation-registers

Time of First Successful Submission: 2025-11-11 19:05:25

integer-division

Time of First Successful Submission: 2025-11-11 21:24:26

modulo-operation

Time of First Successful Submission: 2025-11-11 22:05:12

set-upper-byte

Time of First Successful Submission: 2025-11-11 22:12:32

efficient-modulo

Time of First Successful Submission: 2025-11-12 20:01:41

byte-extraction

Time of First Successful Submission: 2025-11-12 20:38:14

bitwise-and

Time of First Successful Submission: 2025-11-12 20:45:26

check-even

Time of First Successful Submission: 2025-11-12 21:26:25

memory-read

Time of First Successful Submission: 2025-11-12 21:41:20

memory-write

Time of First Successful Submission: 2025-11-12 21:43:02

memory-increment

Time of First Successful Submission: 2025-11-12 22:08:32

byte-access

Time of First Successful Submission: 2025-11-12 22:26:48

memory-size-access

Time of First Successful Submission: 2025-11-12 22:39:13

little-endian-write

Time of First Successful Submission: 2025-11-13 19:36:05

memory-sum

Time of First Successful Submission: 2025-11-13 19:51:51

stack-subtraction

Time of First Successful Submission: 2025-11-13 19:57:28

swap-stack-values

Time of First Successful Submission: 2025-11-13 19:59:55

average-stack-values

Time of First Successful Submission: 2025-11-13 20:19:34

absolute-jump

Time of First Successful Submission: 2025-11-13 20:48:54

relative-jump

Time of First Successful Submission: 2025-11-03 21:52:15

jump-trampoline

Time of First Successful Submission: 2025-11-16 18:07:49

conditional-jump

Time of First Successful Submission: 2025-11-16 22:13:09

indirect-jump

Time of First Successful Submission: 2025-11-21 17:02:59

average-loop

Time of First Successful Submission: 2025-11-21 18:22:38

count-non-zero

Time of First Successful Submission: 2025-11-22 11:10:41

string-lower

Time of First Successful Submission: 2025-11-23 13:23:43

most-common-byte

Time of First Successful Submission: 2025-11-23 23:20:16

Exit

Time of First Successful Submission: 2025-12-11 17:06:40

Socket

Time of First Successful Submission: 2025-12-11 18:27:12

Bind

Time of First Successful Submission: 2025-12-12 19:01:56

Listen

Time of First Successful Submission: 2025-12-12 22:45:47

Accept

Time of First Successful Submission: 2025-12-13 00:45:27

Debugging Programs

Time of First Successful Submission: 2025-11-17 11:24:28

Inspecting Registers

Time of First Successful Submission: 2025-11-17 11:26:56

Examining Memory

Time of First Successful Submission: 2025-11-17 12:07:31

Setting Breakpoints

Time of First Successful Submission: 2025-11-18 14:35:05

GDB Scripting

Time of First Successful Submission: 2025-11-19 13:06:02

Modifying Data

Time of First Successful Submission: 2025-12-04 00:39:09

Modifying Execution

Time of First Successful Submission: 2025-12-04 11:02:30

Broken Functions

Time of First Successful Submission: 2025-12-05 15:46:31

Playing With Programs

27 / 116 9878 / 22784

What's the password?

Time of First Successful Submission: 2025-10-21 08:49:05

... and again!

Time of First Successful Submission: 2025-11-03 14:59:34

Newline Troubles

Time of First Successful Submission: 2025-11-03 15:02:44

Reasoning about files

Time of First Successful Submission: 2025-11-03 15:19:45

Specifying Filenames

Time of First Successful Submission: 2025-11-03 15:21:54

Binary and Hex Encoding

Time of First Successful Submission: 2025-11-03 16:59:43

More Hex

Time of First Successful Submission: 2025-11-04 18:43:22

Decoding Hex

Time of First Successful Submission: 2025-11-05 11:59:01

Decoding Practice

Time of First Successful Submission: 2025-11-05 13:45:53

Encoding Practice

Time of First Successful Submission: 2025-11-05 14:44:09

Hex-encoding ASCII

Time of First Successful Submission: 2025-11-05 23:37:17

Nested Encoding

Time of First Successful Submission: 2025-11-05 23:48:48

Hex-encoding UTF-8

Time of First Successful Submission: 2025-11-06 00:04:13

UTF Mixups

Time of First Successful Submission: 2025-11-07 16:22:41

Modifying Encoded Data

Time of First Successful Submission: 2025-11-07 17:06:52

Decoding Base64

Time of First Successful Submission: 2025-11-07 18:24:52

Encoding Base64

Time of First Successful Submission: 2025-11-07 18:32:58

Dealing with Obfuscation

Time of First Successful Submission: 2025-11-03 17:13:08

Dealing with Obfuscation 2

Time of First Successful Submission: 2025-11-07 19:04:15

cat

Time of First Successful Submission: 2025-11-03 09:22:54

more

Time of First Successful Submission: 2025-11-03 09:23:25

less

Time of First Successful Submission: 2025-11-03 09:24:36

tail

Time of First Successful Submission: 2025-11-03 09:25:05

head

Time of First Successful Submission: 2025-11-03 09:26:28

chown

Time of First Successful Submission: 2025-11-03 09:28:51

chmod

Time of First Successful Submission: 2025-11-03 09:32:15

ssh-keygen

Time of First Successful Submission: 2025-11-03 10:52:59

GCA CTF

2 / 104 36197 / 40496

Pasting into the Desktop

Time of First Successful Submission: 2025-11-17 18:12:21

Connecting over SSH

Time of First Successful Submission: 2025-11-20 14:33:56

Hunter Dojo

4 / 4 35 / 94

Level 1

Time of First Successful Submission: 2026-02-04 18:23:06

Level 2

Time of First Successful Submission: 2026-02-05 14:03:34

Level 3

Time of First Successful Submission: 2026-02-15 15:54:38

Level 4

Time of First Successful Submission: 2026-02-15 15:44:34