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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
2501
The 3rd
Crypto
Hard
12 solves
Submissions (latest 3)
gin

SOLVED!

Sep 21, 11:06 PM

edwowmath

SOLVED!

Sep 21, 10:27 PM

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🌱
2,213 solves
Upcoming challenges reveal the , , and in advance.
Prev

Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
125 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
101 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
63 solves
5
baumroll1234
6-8
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
43 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
55 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
69 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
41 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
22-24
2501
The 3rd
Crypto
Hard
12 solves
25
Coming soon
26
Coming soon
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
1
Coming soon
2
Coming soon
3
Coming soon
4
Coming soon

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Writeups

Writeup for nested eval

baumroll1234

ja
nested eval

2 hours ago

Rows:

Día Nacional de la Alpaca

Topic: WelcomeReleased: Aug 1, 2026

250 solves
Misc
Welcome🌱1.5

by

admin

USER

SOLVED AT

yakitu

5 hours ago

2026/09/16 03:38

2026/09/15 13:41

2026/09/11 06:16

2026/09/08 08:51

2026/09/07 01:39

2026/09/06 10:12

2026/09/05 17:41

2026/09/05 05:55

2026/09/04 11:08

2026/08/31 02:29

2026/08/31 01:54

2026/08/30 13:05

2026/08/30 11:32

2026/08/29 13:31

2026/08/29 02:13

2026/08/29 01:55

2026/08/29 01:10

2026/08/29 00:36

2026/08/28 14:33

2026/08/28 12:40

2026/08/28 02:23

2026/08/27 05:14

2026/08/26 16:19

2026/08/26 14:54

Rows:

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