malacarth

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Intro to Programming Languages

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Commands

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Command Arguments

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Command History

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The Root Path

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Absolute Paths

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Changing position

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Changing to an Absolute Path

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Relative Paths

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Cat

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Ls

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Ls All

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Find

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Piping Echo

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Piping Stdout

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Piping Stdin

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Intro to Cybersecurity

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Path Traversal 1

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Path Traversal 2

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CMDi 1

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CMDi 2

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CMDi 3

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CMDi 4

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CMDi 5

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Authentication Bypass 1

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Authentication Bypass 2

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SQLi 1

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SQLi 2

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SQLi 3

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SQLi 4

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SQLi 5

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XSS 1

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XSS 2

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XSS 3

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XSS 4

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XSS 5

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XSS 6

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XSS 7

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CSRF 1

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CSRF 2

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CSRF 3

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CSRF 4

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CSRF 5

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File Formats: Magic Numbers (Python)

Time of First Successful Submission: 2026-03-09 06:13:30

File Formats: Magic Numbers (C)

Time of First Successful Submission: 2026-03-09 06:28:19

File Formats: Magic Numbers (x86)

Time of First Successful Submission: 2026-03-09 06:46:58

Reading Endianness (Python)

Time of First Successful Submission: 2026-03-09 07:02:46

Reading Endianness (C)

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Reading Endianness (x86)

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Version Information (Python)

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Version Information (C)

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Version Information (x86)

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Metadata and Data (Python)

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Metadata and Data (C)

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Metadata and Data (x86)

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Input Restrictions (Python)

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Input Restrictions (C)

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Input Restrictions (x86)

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Behold the cIMG! (Python)

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Behold the cIMG! (C)

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Behold the cIMG! (x86)

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A Basic cIMG (Python)

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A Basic cIMG (C)

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A Basic cIMG (x86)

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Internal State Mini (C)

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Internal State Mini (x86)

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Internal State (C)

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Internal State (x86)

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File Formats: Directives (C)

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File Formats: Directives (x86)

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The Patch Directive

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Optimizing for Space

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Tweaking Images

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Storage and Retrieval

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Extracting Knowledge

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Advanced Sprites

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Accessing Resources

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Unsafe Animations

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Your First Overflow (easy)

Time of First Successful Submission: 2026-03-30 04:41:17

Your First Overflow (hard)

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Precision (easy)

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Precision (hard)

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Variable Control (easy)

Time of First Successful Submission: 2026-03-30 05:27:04

Variable Control (hard)

Time of First Successful Submission: 2026-03-30 05:30:13

Control Hijack (easy)

Time of First Successful Submission: 2026-03-30 05:36:37

Control Hijack (hard)

Time of First Successful Submission: 2026-03-30 05:43:04

Tricky Control Hijack (easy)

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Tricky Control Hijack (hard)

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Start Here

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Using the Terminal

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Using the VSCode Workspace

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Using the GUI Desktop

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Pasting into the Desktop

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Restarting Challenges

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Challenge Programs

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The Flag File

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Using Privileged Mode

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Persistent Home Directories - One

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Persistent Home Directories - Two

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Linux Luminarium

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Intro to Commands

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Intro to Arguments

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Command History

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The Root

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Program and absolute paths

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Position thy self

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Position elsewhere

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implicit relative paths, from /

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explicit relative paths, from /

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implicit relative path

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home sweet home

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cat: not the pet, but the command!

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catting absolute paths

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more catting practice

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grepping for a needle in a haystack

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comparing files

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listing files

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touching files

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removing files

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moving files

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copying files

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hidden files

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An Epic Filesystem Quest

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making directories

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finding files

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linking files

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Learning From Documentation

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Learning Complex Usage

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Reading Manuals

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Searching Manuals

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Searching For Manuals

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Helpful Programs

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Help for Builtins

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Matching with *

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Matching with ?

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Matching with []

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Matching paths with []

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Multiple globs

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Mixing globs

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Exclusionary globbing

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Tab completion

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Multiple options for tab completion

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Tab completion on commands

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Redirecting output

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Redirecting more output

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Appending output

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Redirecting errors

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Redirecting input

Time of First Successful Submission: 2026-01-15 19:39:22

Grepping stored results

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Grepping live output

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Grepping errors

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Filtering with grep -v

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Filtering with sed

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Duplicating piped data with tee

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Process substitution for input

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Writing to multiple programs

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Split-piping stderr and stdout

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Named pipes

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Printing Variables

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Setting Variables

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Multi-word Variables

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Exporting Variables

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Printing Exported Variables

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Storing Command Output

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Reading Input

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Reading Files

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Translating characters

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Deleting characters

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Deleting newlines

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Extracting the first lines with head

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Extracting specific sections of text

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Sorting data

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Listing Processes

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Killing Processes

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Interrupting Processes

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Killing Misbehaving Processes

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Suspending Processes

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Resuming Processes

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Backgrounding Processes

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Foregrounding Processes

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Starting Backgrounded Processes

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Process Exit Codes

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Becoming root with su

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Other users with su

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Cracking passwords

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Using sudo

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Changing File Ownership

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Groups and Files

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Fun With Groups Names

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Changing Permissions

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Executable Files

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Permission Tweaking Practice

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Permissions Setting Practice

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The SUID Bit

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Chaining with Semicolons

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Building on Success

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Handling Failure

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Your First Shell Script

Time of First Successful Submission: 2026-01-18 21:28:10

Redirecting Script Output

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Executable Shell Scripts

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Understanding Shebangs

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Scripting with Arguments

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Scripting with Conditionals

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Scripting with Default Cases

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Scripting with Multiple Conditions

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Reading Shell Scripts

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Launching Screen

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Detaching and Attaching

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Finding Sessions

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Switching Windows

Time of First Successful Submission: 2026-01-18 22:02:29

Detaching and Attaching (tmux)

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Switching Windows (tmux)

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The PATH Variable

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Setting PATH

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Finding Commands

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Adding Commands

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Hijacking Commands

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Bashrc Backdoor

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Sniffing Input

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Overshared Directories

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Tricky Linking

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Sniffing Process Arguments

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Snooping on Configurations

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The Fork Bomb

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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 /

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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: 2026-02-22 18:09:19

Moving Between Registers

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Loading From Memory

Time of First Successful Submission: 2026-02-22 18:11:44

More Loading Practice

Time of First Successful Submission: 2026-02-22 18:12:40

Dereferencing Pointers

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Dereferencing Yourself

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Dereferencing with Offsets

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Stored Addresses

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Double Dereference

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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: 2026-02-22 18:23:21

Disassembling Programs

Time of First Successful Submission: 2026-02-22 18:27:31

Tracing Syscalls

Time of First Successful Submission: 2026-02-22 18:30:12

Starting GDB

Time of First Successful Submission: 2026-02-22 18:31:44

Quitting GDB

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Starting Programs in GDB

Time of First Successful Submission: 2026-02-22 18:34:01

Disassembling in GDB

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Stepping Through Instructions

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Reading Register Values

Time of First Successful Submission: 2026-02-22 18:51:05

Popping Stack Values

Time of First Successful Submission: 2026-02-22 18:54:15

Examining Memory

Time of First Successful Submission: 2026-02-22 18:55:45

Examining Stack Pointers

Time of First Successful Submission: 2026-02-22 18:59:28

Cooperative Debugging

Time of First Successful Submission: 2026-02-22 19:07:29

Writing Output

Time of First Successful Submission: 2026-02-22 19:15:46

Chaining Syscalls

Time of First Successful Submission: 2026-02-22 19:17:12

Writing Strings

Time of First Successful Submission: 2026-02-22 19:19:06

Reading Data

Time of First Successful Submission: 2026-02-22 19:21:27

Opening Files

Time of First Successful Submission: 2026-02-22 19:23:41

Hardcoding the Filename

Time of First Successful Submission: 2026-02-22 19:25:03

Comparing Values

Time of First Successful Submission: 2026-02-22 19:34:11

Comparing Characters

Time of First Successful Submission: 2026-02-22 19:35:19

Conditional Control Flow

Time of First Successful Submission: 2026-02-22 19:36:46

Comparing Strings

Time of First Successful Submission: 2026-02-22 19:38:41

Reverse the Password

Time of First Successful Submission: 2026-02-22 19:43:32

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-22 19:51:13

Looping

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Reverse the Calculation

Time of First Successful Submission: 2026-02-22 19:56:28

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

Time of First Successful Submission: 2026-03-02 04:30:40

linear-equation-registers

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integer-division

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modulo-operation

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set-upper-byte

Time of First Successful Submission: 2026-03-02 04:37:57

efficient-modulo

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byte-extraction

Time of First Successful Submission: 2026-03-02 04:41:23

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

Time of First Successful Submission: 2026-03-02 04:55:47

swap-stack-values

Time of First Successful Submission: 2026-03-02 04:58:42

average-stack-values

Time of First Successful Submission: 2026-03-02 04:59:24

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

Time of First Successful Submission: 2026-03-02 05:05:50

average-loop

Time of First Successful Submission: 2026-03-02 05:06:30

count-non-zero

Time of First Successful Submission: 2026-03-02 05:07:14

string-lower

Time of First Successful Submission: 2026-03-02 05:08:15

most-common-byte

Time of First Successful Submission: 2026-03-02 05:10:19

Exit

Time of First Successful Submission: 2026-03-03 05:36:43

Socket

Time of First Successful Submission: 2026-03-03 05:40:25

Bind

Time of First Successful Submission: 2026-03-03 05:43:04

Listen

Time of First Successful Submission: 2026-03-03 05:44:14

Accept

Time of First Successful Submission: 2026-03-03 05:45:39

Static Response

Time of First Successful Submission: 2026-03-03 05:51:11

Dynamic Response

Time of First Successful Submission: 2026-03-03 05:53:49

Iterative GET Server

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

Concurrent GET Server

Time of First Successful Submission: 2026-03-03 05:55:56

Concurrent POST Server

Time of First Successful Submission: 2026-03-03 05:57:31

Web Server

Time of First Successful Submission: 2026-03-03 05:58:35

Debugging Programs

Time of First Successful Submission: 2026-03-02 05:13:27

Inspecting Registers

Time of First Successful Submission: 2026-03-02 05:17:55

Examining Memory

Time of First Successful Submission: 2026-03-02 05:36:57

Setting Breakpoints

Time of First Successful Submission: 2026-03-02 06:05:48

GDB Scripting

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

Modifying Data

Time of First Successful Submission: 2026-03-03 05:14:07

Modifying Execution

Time of First Successful Submission: 2026-03-03 05:21:51

Broken Functions

Time of First Successful Submission: 2026-03-03 05:31:56

Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-01-25 20:45:57

... and again!

Time of First Successful Submission: 2026-01-25 20:47:02

Newline Troubles

Time of First Successful Submission: 2026-01-25 20:49:09

Reasoning about files

Time of First Successful Submission: 2026-01-25 20:53:46

Specifying Filenames

Time of First Successful Submission: 2026-01-25 20:55:07

Binary and Hex Encoding

Time of First Successful Submission: 2026-01-25 21:00:59

More Hex

Time of First Successful Submission: 2026-01-25 21:03:29

Decoding Hex

Time of First Successful Submission: 2026-01-25 21:08:04

Decoding Practice

Time of First Successful Submission: 2026-01-25 21:10:47

Encoding Practice

Time of First Successful Submission: 2026-01-26 01:46:57

Hex-encoding ASCII

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

Nested Encoding

Time of First Successful Submission: 2026-01-26 01:50:34

Hex-encoding UTF-8

Time of First Successful Submission: 2026-01-26 02:07:53

UTF Mixups

Time of First Successful Submission: 2026-01-26 02:09:46

Modifying Encoded Data

Time of First Successful Submission: 2026-01-26 02:12:16

Decoding Base64

Time of First Successful Submission: 2026-01-26 02:14:29

Encoding Base64

Time of First Successful Submission: 2026-01-26 02:16:50

Dealing with Obfuscation

Time of First Successful Submission: 2026-01-26 02:17:48

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-01-26 02:19:25

Your First HTTP Request

Time of First Successful Submission: 2026-01-26 02:21:29

Reading Flask

Time of First Successful Submission: 2026-01-26 02:25:49

Commented Data

Time of First Successful Submission: 2026-01-26 04:02:04

HTTP Metadata

Time of First Successful Submission: 2026-01-26 04:07:56

HTTP (netcat)

Time of First Successful Submission: 2026-01-26 04:26:49

HTTP Paths (netcat)

Time of First Successful Submission: 2026-01-26 04:30:51

HTTP (curl)

Time of First Successful Submission: 2026-01-26 04:34:02

HTTP (python)

Time of First Successful Submission: 2026-01-26 04:36:29

HTTP Host Header (python)

Time of First Successful Submission: 2026-01-26 04:41:23

HTTP Host Header (curl)

Time of First Successful Submission: 2026-01-26 04:42:59

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-01-26 04:46:50

URL Encoding (netcat)

Time of First Successful Submission: 2026-01-26 04:53:29

HTTP GET Parameters

Time of First Successful Submission: 2026-01-26 04:55:22

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-02-01 23:35:29

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-02-01 23:42:10

HTTP Forms

Time of First Successful Submission: 2026-02-02 00:58:14

HTTP Forms (curl)

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

HTTP Forms (netcat)

Time of First Successful Submission: 2026-02-02 01:07:14

HTTP Forms (python)

Time of First Successful Submission: 2026-02-02 01:13:05

HTTP Forms Without Forms

Time of First Successful Submission: 2026-02-02 01:19:06

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-02-02 05:45:54

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-02-02 05:47:17

HTTP Redirects (netcat)

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

HTTP Redirects (curl)

Time of First Successful Submission: 2026-02-02 05:50:47

HTTP Redirects (python)

Time of First Successful Submission: 2026-02-02 05:53:32

HTTP Cookies (curl)

Time of First Successful Submission: 2026-02-02 05:56:08

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-02-02 05:58:06

HTTP Cookies (python)

Time of First Successful Submission: 2026-02-02 05:59:56

Server State (python)

Time of First Successful Submission: 2026-02-02 06:01:56

Listening Web

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

Speaking Redirects

Time of First Successful Submission: 2026-02-02 06:09:43

JavaScript Redirects

Time of First Successful Submission: 2026-02-02 06:12:18

Including JavaScript

Time of First Successful Submission: 2026-02-02 06:15:42

HTTP (javascript)

Time of First Successful Submission: 2026-02-02 06:21:07

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-02-02 06:26:54

HTTP Forms (javascript)

Time of First Successful Submission: 2026-02-02 06:29:36

SQL Queries

Time of First Successful Submission: 2026-02-02 06:31:54

Filtering SQL

Time of First Successful Submission: 2026-02-02 06:33:00

Choosing Columns

Time of First Successful Submission: 2026-02-02 06:34:25

Exclusionary Filtering

Time of First Successful Submission: 2026-02-02 06:35:38

Filtering Strings

Time of First Successful Submission: 2026-02-02 06:37:01

Filtering on Expressions

Time of First Successful Submission: 2026-02-02 06:38:12

SELECTing Expressions

Time of First Successful Submission: 2026-02-02 06:41:22

Composite Conditions

Time of First Successful Submission: 2026-02-02 06:42:22

Reaching Your LIMITs

Time of First Successful Submission: 2026-02-02 06:43:34

Querying Metadata

Time of First Successful Submission: 2026-02-02 06:45:25

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-01-12 17:42:17

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-12 17:49:17

Using the GUI Desktop

Time of First Successful Submission: 2026-01-12 17:51:16

Pasting into the Desktop

Time of First Successful Submission: 2026-01-12 17:53:03

Restarting Challenges

Time of First Successful Submission: 2026-01-12 17:54:51

Getting Help

Time of First Successful Submission: 2026-01-18 23:47:38

Challenge Programs

Time of First Successful Submission: 2026-01-13 19:21:02

The Flag File

Time of First Successful Submission: 2026-01-13 19:22:48

Using Privileged Mode

Time of First Successful Submission: 2026-01-13 19:31:54

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-13 19:34:36

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-13 19:37:04