grehaus

🐧

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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CMDi 6

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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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Connect

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Send

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Shutdown

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Listen

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Scan 1

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Scan 2

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Monitor 1

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Monitor 2

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Sniffing Cookies

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Network Configuration

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Firewall 1

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Firewall 2

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Firewall 3

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Denial of Service 1

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Denial of Service 2

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XOR

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Getting Started

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Using the VSCode Workspace

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Using the GUI Desktop

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Pasting into the Desktop

Time of First Successful Submission: 2025-01-25 19:50:39

Restarting Challenges

Time of First Successful Submission: 2025-01-25 20:23:10

Getting Help

Time of First Successful Submission: 2025-01-25 20:27:06

Challenge Programs

Time of First Successful Submission: 2025-01-25 20:29:20

The Flag File

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Using Practice 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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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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Position yet 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

Time of First Successful Submission: 2025-01-25 21:01:32

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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listing files

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touching files

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removing files

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hidden files

Time of First Successful Submission: 2025-01-26 02:30:40

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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Mixing globs

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Exclusionary globbing

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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

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Grepping stored results

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Grepping live output

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Grepping errors

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Duplicating piped data with tee

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Writing to multiple programs

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Split-piping stderr and stdout

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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

Time of First Successful Submission: 2025-03-05 21:02:56

Reading Input

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Reading Files

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Listing Processes

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Killing Processes

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Interrupting 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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Changing File Ownership

Time of First Successful Submission: 2025-03-06 00:53:00

Groups and Files

Time of First Successful Submission: 2025-03-06 00:57:21

Fun With Groups Names

Time of First Successful Submission: 2025-03-06 00:58:48

Changing Permissions

Time of First Successful Submission: 2025-03-06 01:05:04

Executable Files

Time of First Successful Submission: 2025-03-06 01:30:57

Permission Tweaking Practice

Time of First Successful Submission: 2025-03-06 01:35:59

Permissions Setting Practice

Time of First Successful Submission: 2025-03-06 01:48:06

The SUID Bit

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Becoming root with su

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Other users with su

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Cracking passwords

Time of First Successful Submission: 2025-03-06 02:00:15

Using sudo

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Chaining with Semicolons

Time of First Successful Submission: 2025-03-06 02:08:20

Your First Shell Script

Time of First Successful Submission: 2025-03-06 02:10:41

Redirecting Script Output

Time of First Successful Submission: 2025-03-06 02:13:26

Executable Shell Scripts

Time of First Successful Submission: 2025-03-06 02:15:11

The PATH Variable

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Setting PATH

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Adding Commands

Time of First Successful Submission: 2025-03-06 02:26:30

Hijacking Commands

Time of First Successful Submission: 2025-03-06 02:43:29

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

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Moving Between Registers

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Tracing Syscalls

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Starting GDB

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Starting Programs in GDB

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Loading From Memory

Time of First Successful Submission: 2025-03-16 12:42:29

More Loading Practice

Time of First Successful Submission: 2025-03-16 12:44:17

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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Triple Dereference

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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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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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level1

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level2

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level3

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level4

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Playing With Programs

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level1

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level2

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level3

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level4

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level5

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level6

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level7

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SQL Queries

Time of First Successful Submission: 2025-04-02 01:22:09

Filtering SQL

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Choosing Columns

Time of First Successful Submission: 2025-04-02 01:46:11

Exclusionary Filtering

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Filtering Strings

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Filtering on Expressions

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SELECTing Expressions

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Composite Conditions

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Reaching Your LIMITs

Time of First Successful Submission: 2025-04-03 12:21:55

Querying Metadata

Time of First Successful Submission: 2025-04-03 19:50:59