fish2

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Intro to Cybersecurity

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File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2026-05-25 23:58:45

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2026-05-26 00:07:09

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2026-05-26 00:13:59

Reading Endianness (Python)

Time of First Successful Submission: 2026-05-26 00:16:22

Reading Endianness (C)

Time of First Successful Submission: 2026-05-26 00:18:36

Reading Endianness (x86)

Time of First Successful Submission: 2026-05-26 00:24:02

Version Information (Python)

Time of First Successful Submission: 2026-05-26 02:38:55

Version Information (C)

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Version Information (x86)

Time of First Successful Submission: 2026-05-26 02:49:36

Metadata and Data (Python)

Time of First Successful Submission: 2026-05-26 03:36:35

Metadata and Data (C)

Time of First Successful Submission: 2026-05-26 03:40:22

Metadata and Data (x86)

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Input Restrictions (Python)

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Input Restrictions (C)

Time of First Successful Submission: 2026-05-26 03:53:32

Input Restrictions (x86)

Time of First Successful Submission: 2026-05-26 03:56:04

Behold the cIMG! (Python)

Time of First Successful Submission: 2026-05-26 04:00:38

Behold the cIMG! (C)

Time of First Successful Submission: 2026-05-26 04:02:39

Behold the cIMG! (x86)

Time of First Successful Submission: 2026-05-26 04:48:26

A Basic cIMG (Python)

Time of First Successful Submission: 2026-05-26 05:30:58

A Basic cIMG (C)

Time of First Successful Submission: 2026-05-26 05:35:16

A Basic cIMG (x86)

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Computing 101

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Your First Register

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Your First Syscall

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Exit Codes

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Building Executables

Time of First Successful Submission: 2026-05-22 12:15:51

Moving Between Registers

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Loading From Memory

Time of First Successful Submission: 2026-05-22 12:33:06

More Loading Practice

Time of First Successful Submission: 2026-05-22 12:33:42

Dereferencing Pointers

Time of First Successful Submission: 2026-05-22 12:37:18

Dereferencing Yourself

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Dereferencing with Offsets

Time of First Successful Submission: 2026-05-22 12:39:30

Stored Addresses

Time of First Successful Submission: 2026-05-22 12:41:10

Double Dereference

Time of First Successful Submission: 2026-05-22 12:49:54

The Stack

Time of First Successful Submission: 2026-05-22 12:53:06

Stack Offsets

Time of First Successful Submission: 2026-05-22 12:55:20

Program Arguments on the Stack

Time of First Successful Submission: 2026-05-22 13:01:03

Popping From the Stack

Time of First Successful Submission: 2026-05-22 13:02:43

Disassembling Programs

Time of First Successful Submission: 2026-05-22 13:15:46

Tracing Syscalls

Time of First Successful Submission: 2026-05-22 13:17:18

Starting GDB

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Quitting GDB

Time of First Successful Submission: 2026-05-22 13:18:39

Starting Programs in GDB

Time of First Successful Submission: 2026-05-22 13:19:26

Disassembling in GDB

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Stepping Through Instructions

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Reading Register Values

Time of First Successful Submission: 2026-05-22 13:21:37

Popping Stack Values

Time of First Successful Submission: 2026-05-22 13:22:56

Examining Memory

Time of First Successful Submission: 2026-05-22 13:24:04

Examining Stack Pointers

Time of First Successful Submission: 2026-05-22 13:25:35

Cooperative Debugging

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Writing Output

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Chaining Syscalls

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Writing Strings

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Reading Data

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Opening Files

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Hardcoding the Filename

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Comparing Values

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Comparing Characters

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Conditional Control Flow

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Comparing Strings

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Reverse the Password

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Conditionals Without Conditionals

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Looping

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Reverse the Calculation

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Reverse the Reverse

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Dealing with Bitwise Operations

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Loops on Data

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set-register

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set-multiple-registers

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add-to-register

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linear-equation-registers

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integer-division

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modulo-operation

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set-upper-byte

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efficient-modulo

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byte-extraction

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bitwise-and

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check-even

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memory-read

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memory-write

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memory-increment

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byte-access

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memory-size-access

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little-endian-write

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memory-sum

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stack-subtraction

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swap-stack-values

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average-stack-values

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absolute-jump

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relative-jump

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jump-trampoline

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conditional-jump

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indirect-jump

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average-loop

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count-non-zero

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string-lower

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most-common-byte

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Exit

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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

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Web Server

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Debugging Programs

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Inspecting Registers

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Examining Memory

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Setting Breakpoints

Time of First Successful Submission: 2026-05-25 05:12:15

GDB Scripting

Time of First Successful Submission: 2026-05-25 05:16:44

Modifying Data

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Modifying Execution

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Broken Functions

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