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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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Discussion with friends or AI is welcome (account sharing is prohibited).

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Sharing solutions is allowed only after the challenge period has ended.

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Today's Challenge
hiikunzhiikunz
decreasing
Misc
Hard
10 solves
Submissions (latest 3)
kurgm
kurgm

SOLVED!

Oct 14, 4:56 PM

Leaderboard

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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🌱
2,284 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
46 solves
1
admin
Baby Alpaca
Misc
Welcome🌱
137 solves
2
tan90909090tan90909090
C# File-based app
Rev
Easy🌱
72 solves
3-4
2501
Shared Prime
Crypto
Medium
75 solves
5-8
tan90909090tan90909090
fsbase modification
Pwn
Hard
58 solves
9-12
2501
Almost Shared Prime
Crypto
Hard
40 solves
 
2501
Almost Shared Prime
Crypto
Hard
40 solves
13-14
tan90909090tan90909090
cowsay jail
Misc
Medium
52 solves
15-18
hiikunzhiikunz
decreasing
Misc
Hard
10 solves
19
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Writeups

Writeup for cowsay jail

lumma

ja
cowsay jail

1 hour ago

tadanobutubutu

Writeup for fsbase modification

Rows:

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Topic: Client-SideReleased: Feb 15, 2026

143 solves
Web
Medium6.0

by

tchen

tchen

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