aleph

Start Here

12 / 12 1411 / 43378


Using the Terminal

Time of First Successful Submission: 2026-02-25 10:35:33

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-25 10:38:14

Using the GUI Desktop

Time of First Successful Submission: 2026-02-25 10:40:02

Pasting into the Desktop

Time of First Successful Submission: 2026-02-25 10:42:27

Restarting Challenges

Time of First Successful Submission: 2026-02-25 11:03:32

Challenge Programs

Time of First Successful Submission: 2026-02-25 11:14:27

The Flag File

Time of First Successful Submission: 2026-02-25 11:15:41

Using Privileged Mode

Time of First Successful Submission: 2026-02-25 11:19:45

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-25 11:21:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-25 11:22:25


Playing With Programs

39 / 116 8678 / 23386


What's the password?

Time of First Successful Submission: 2026-02-25 14:32:31

... and again!

Time of First Successful Submission: 2026-02-25 14:33:22

Newline Troubles

Time of First Successful Submission: 2026-02-25 14:34:35

Reasoning about files

Time of First Successful Submission: 2026-02-25 14:51:49

Specifying Filenames

Time of First Successful Submission: 2026-02-25 14:53:26

Binary and Hex Encoding

Time of First Successful Submission: 2026-02-25 14:59:30

More Hex

Time of First Successful Submission: 2026-02-25 15:00:43

Decoding Hex

Time of First Successful Submission: 2026-02-25 15:20:11

Decoding Practice

Time of First Successful Submission: 2026-02-25 15:38:08

Encoding Practice

Time of First Successful Submission: 2026-02-25 15:48:03

Hex-encoding ASCII

Time of First Successful Submission: 2026-02-25 15:51:20

Nested Encoding

Time of First Successful Submission: 2026-02-25 16:00:41

Hex-encoding UTF-8

Time of First Successful Submission: 2026-02-25 16:04:38

UTF Mixups

Time of First Successful Submission: 2026-02-25 16:09:42

Modifying Encoded Data

Time of First Successful Submission: 2026-02-25 18:24:10

Decoding Base64

Time of First Successful Submission: 2026-02-25 18:26:44

Encoding Base64

Time of First Successful Submission: 2026-02-25 18:29:51

Dealing with Obfuscation

Time of First Successful Submission: 2026-02-25 18:35:48

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-02-25 18:44:28

cat

Time of First Successful Submission: 2026-02-26 08:49:42

more

Time of First Successful Submission: 2026-02-26 08:51:17

less

Time of First Successful Submission: 2026-02-26 08:52:24

tail

Time of First Successful Submission: 2026-02-26 08:53:40

head

Time of First Successful Submission: 2026-02-26 08:54:11

sort

Time of First Successful Submission: 2026-02-26 08:55:08

vim

Time of First Successful Submission: 2026-02-26 08:55:50

emacs

Time of First Successful Submission: 2026-02-26 08:57:24

nano

Time of First Successful Submission: 2026-02-26 08:57:53

rev

Time of First Successful Submission: 2026-02-26 08:58:39

od

Time of First Successful Submission: 2026-02-26 09:15:49

hd

Time of First Successful Submission: 2026-02-26 09:24:10

xxd

Time of First Successful Submission: 2026-02-26 09:26:17

base32

Time of First Successful Submission: 2026-02-26 09:28:19

base64

Time of First Successful Submission: 2026-02-26 09:29:07

split

Time of First Successful Submission: 2026-02-26 09:32:31

date

Time of First Successful Submission: 2026-02-25 19:13:10

wc

Time of First Successful Submission: 2026-02-25 19:09:25

gcc

Time of First Successful Submission: 2026-02-25 19:01:00

as

Time of First Successful Submission: 2026-02-25 19:10:40


GCA CTF

12 / 104 1648 / 43655


Using the Terminal

Time of First Successful Submission: 2026-02-25 10:35:33

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-25 10:38:14

Using the GUI Desktop

Time of First Successful Submission: 2026-02-25 10:40:02

Pasting into the Desktop

Time of First Successful Submission: 2026-02-25 10:42:27

Connecting over SSH

Time of First Successful Submission: 2026-02-25 11:25:22

Restarting Challenges

Time of First Successful Submission: 2026-02-25 11:03:32

Getting Help

Time of First Successful Submission: 2026-02-25 11:27:13

Challenge Programs

Time of First Successful Submission: 2026-02-25 11:14:27

The Flag File

Time of First Successful Submission: 2026-02-25 11:15:41

Using Privileged Mode

Time of First Successful Submission: 2026-02-25 11:19:45

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-25 11:21:48

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-25 11:22:25