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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
27 solves
Submissions (latest 3)
lumma

SOLVED!

Oct 27, 11:30 AM

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
27 solves
 
k0080k0080
what is my pointer 4
Pwn
Hard
27 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

Writeups

tchen

Writeup for IP Blocked Secret

tchen

author
en

2026/07/15 23:53




nirvana

Writeup for IP Blocked Secret

ja

2026/07/06 07:03


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