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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
minaminaominaminao
\^o^/
Misc
Hard
10 solves
Submissions (latest 3)
edwowmath
edwowmath

SOLVED!

Sep 8, 9:37 PM

a01sa01to

SOLVED!

Sep 8, 5:13 PM

panya

SOLVED!

Sep 8, 3:54 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🌱
2,190 solves
Upcoming challenges reveal the , , and in advance.
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Sep 2026

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tchentchen
Springing
Web
Medium
67 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
98 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
80 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
54 solves
5
baumroll1234
6-8
minaminaominaminao
Bitflip RSA
Crypto
Hard
40 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
40 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
10 solves
12
Coming soon
13
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Want a harder challenge?

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Writeup for Leaked Flag Checker

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2026/09/07 13:39

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Writeup for Vending Machine: Revised Version (warn: some code reading ahead)

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Writeup for Let's Shut Down Linux (with reading)

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Writeup for Springing

ja

2026/09/05 05:10

Rows:

\^o^/

Topic: JailReleased: Sep 9, 2026

10 solves
Misc
Hard7.5

by

minaminao

minaminao

USER

SOLVED AT

edwowmath

edwowmath

44 minutes ago

5 hours ago

6 hours ago

6 hours ago

6 hours ago

6 hours ago

6 hours ago

7 hours ago

7 hours ago

7 hours ago

Rows:

descriptionsolves