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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
26 solves
Submissions (latest 3)
curetwinkle
curetwinkle

SOLVED!

Oct 27, 9:13 AM

pppp4649

SOLVED!

Oct 27, 2:37 AM

Leaderboard

Try the first challenge

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

View challenge
admin
AlpacaHack 2100
Misc
Welcome🌱
2,317 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
48 solves
1
admin
Baby Alpaca
Misc
Welcome🌱
163 solves
2
tan90909090tan90909090
C# File-based app
Rev
Easy🌱
81 solves
3-4
2501
Shared Prime
Crypto
Medium
90 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
26 solves
 
k0080k0080
what is my pointer 4
Pwn
Hard
26 solves
29
Coming soon
30
Coming soon
31
Coming soon
1
Coming soon

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Writeups

Writeup for IP Blocked Secret

umachaba

ja
IP Blocked Secret

2 hours ago

tadanobutubutu

Writeup for Σecret

ja

2026/10/24 16:37

tadanobutubutu

Writeup for x32 ABI flag checker

Rows:

IP Blocked Secret

Topic: SQLReleased: Jul 5, 2026

79 solves
Web
Hard6.0

by

tchen

tchen

USER

SOLVED AT

umachaba

2026/10/26 11:16

2026/10/24 21:29

2026/10/22 13:13

2026/10/11 08:39

2026/10/09 10:41

2026/09/29 08:03

2026/09/28 17:54

2026/08/28 12:49

2026/08/11 10:09

2026/08/02 22:32

2026/08/01 08:04

2026/07/28 12:33

2026/07/27 06:52

2026/07/22 17:40

2026/07/21 15:54

2026/07/19 05:33

2026/07/15 14:12

2026/07/14 02:43

2026/07/12 14:19

2026/07/12 12:56

2026/07/10 21:57

2026/07/09 13:34

2026/07/08 22:10

2026/07/08 17:51

2026/07/06 16:47

Rows:

descriptionsolveswriteups