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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
hiikunzhiikunz
nested eval
Misc
Hard
33 solves
Submissions (latest 3)
mti

SOLVED!

Sep 20, 8:32 PM

serioton

SOLVED!

Sep 20, 2:21 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🌱
2,210 solves
Upcoming challenges reveal the , , and in advance.
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Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
124 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
55 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
55 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
43 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
54 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
68 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
39 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
33 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
33 solves
22
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25
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Writeups

Writeup for neighboRhood_diStAnce

baumroll1234

ja
neighboRhood_diStAnce

2026/09/18 22:37

curetwinkle

Writeup for simple ROP(アセンブリ解説多め)

ja

2026/09/15 03:55

gattoartz

Writeup for Integer Writer

ja

2026/09/14 12:03

sp1n0z4

Writeup for Bitflip RSA

en

2026/09/12 23:42

gattoartz

Writeup for Leaked Flag Checker

Rows:

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Topic: Client-SideReleased: Feb 15, 2026

136 solves
Web
Medium6.0

by

tchen

tchen

USER

SOLVED AT

agnaby

2026/09/17 04:33

2026/09/09 05:47

2026/09/06 05:16

2026/08/30 09:45

2026/08/29 11:41

2026/08/25 10:06

2026/08/12 11:54

2026/07/24 12:57

2026/07/06 05:24

2026/06/14 09:52

2026/06/10 23:53

2026/05/14 06:52

2026/05/12 14:18

2026/05/12 09:30

2026/05/10 02:50

2026/04/29 14:53

2026/04/29 05:39

2026/04/23 02:27

2026/04/22 06:45

2026/04/19 03:32

2026/04/15 14:38

2026/04/14 14:00

2026/04/12 13:57

2026/04/02 10:34

2026/03/28 08:49

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