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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
17 solves
Submissions (latest 3)
kurgm
kurgm

SOLVED!

Oct 25, 3:59 AM

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🌱
2,303 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🌱
156 solves
2
tan90909090tan90909090
C# File-based app
Rev
Easy🌱
78 solves
3-4
2501
Shared Prime
Crypto
Medium
87 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
31 solves
23-24
pppp4649pppp4649
Σecret
Crypto
Easy🌱
41 solves
25-28
k0080k0080
what is my pointer 4
Pwn
Hard
17 solves
 
k0080k0080
what is my pointer 4
Pwn
Hard
17 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

4 hours ago

tadanobutubutu

Writeup for Σecret

ja

14 hours ago

tadanobutubutu

Writeup for x32 ABI flag checker

ojun

Writeup for fsbase modification

ja

2026/10/15 13:59

Rows:

LiteAlpaca

Topic: Supply ChainReleased: Apr 17, 2026

179 solves
Misc
Easy🌱2.0

by

serioton

serioton

USER

SOLVED AT

a-hacker

2026/10/13 01:26

2026/10/08 12:33

2026/09/26 05:13

2026/09/15 05:07

2026/08/30 17:05

2026/08/28 14:30

2026/08/27 05:26

2026/08/26 08:33

2026/08/23 00:13

2026/08/21 08:10

2026/08/13 13:02

2026/08/10 15:54

2026/08/09 10:22

2026/08/07 10:43

2026/08/06 15:40

2026/08/06 14:19

2026/08/05 03:55

2026/08/04 05:28

2026/07/30 05:35

2026/07/29 05:53

2026/07/23 10:46

2026/07/13 23:52

2026/07/10 05:41

2026/07/06 02:53

2026/07/05 08:58

Rows:

descriptionsolveswriteups