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Daily AlpacaHack

A CTF challenge series with fun puzzles to enjoy every day

What is Daily AlpacaHack?

We regularly publish simple, beginner-friendly or educational CTF challenges!

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Solve each challenge within its time window to appear on the leaderboard.

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Today's Challenge
k0080k0080
what is my pointer 4
Pwn
Hard
21 solves
Submissions (latest 3)
baumroll1234

SOLVED!

Oct 25, 11:25 PM

hiikunz

SOLVED!

Oct 25, 12:22 PM

Leaderboard

Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

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admin
AlpacaHack 2100
Misc
Welcome🌱
2,309 solves
Upcoming challenges reveal the , , and in advance.
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Oct 2026

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k0080k0080
what is my pointer 2
Pwn
Hard
47 solves
1
admin
Baby Alpaca
Misc
Welcome🌱
160 solves
2
tan90909090tan90909090
C# File-based app
Rev
Easy🌱
80 solves
3-4
2501
Shared Prime
Crypto
Medium
89 solves
5-8
tan90909090tan90909090
fsbase modification
Pwn
Hard
59 solves
9-12
2501
Almost Shared Prime
Crypto
Hard
44 solves
 
2501
Almost Shared Prime
Crypto
Hard
44 solves
13-14
tan90909090tan90909090
cowsay jail
Misc
Medium
60 solves
15-18
hiikunzhiikunz
decreasing
Misc
Hard
34 solves
19-22
tan90909090tan90909090
x32 ABI flag checker
Rev
Hard
32 solves
23-24
pppp4649pppp4649
Σecret
Crypto
Easy🌱
43 solves
25-28
k0080k0080
what is my pointer 4
Pwn
Hard
21 solves
 
k0080k0080
what is my pointer 4
Pwn
Hard
21 solves
29
Coming soon
30
Coming soon
31
Coming soon
1
Coming soon

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Writeups

Writeup for nc magic

haruhana

ja
nc magic

2026/10/25 02:32

tadanobutubutu

Writeup for Σecret

ja

2026/10/24 16:37

tadanobutubutu

Writeup for x32 ABI flag checker

ojun

Writeup for fsbase modification

ja

2026/10/15 13:59

Rows:

You've Got Shlex

Topic: JailReleased: Jul 14, 2026

93 solves
Misc
Medium5.0

by

tchen

tchen

USER

SOLVED AT

snocc

2026/10/06 17:24

2026/09/27 08:25

2026/09/16 03:50

2026/09/04 16:34

2026/07/28 09:11

2026/07/27 01:10

2026/07/22 01:08

2026/07/21 12:19

2026/07/20 20:39

2026/07/20 16:22

2026/07/19 05:54

2026/07/18 12:15

2026/07/17 12:33

2026/07/17 03:02

2026/07/16 09:49

2026/07/15 20:21

2026/07/15 15:57

2026/07/15 08:42

2026/07/15 04:06

2026/07/14 15:04

2026/07/14 14:59

2026/07/14 14:46

2026/07/14 14:14

2026/07/14 14:08

2026/07/14 13:45

Rows:

descriptionsolveswriteups