Daily AlpacaHack

A daily CTF challenge with a fun new puzzle every day

What is Daily AlpacaHack?

We publish one simple, beginner-friendly or educational CTF challenge every day!

Join Anytime

Solve within 24 hours of release to appear on the leaderboard.

Not a Competition

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

Solution Sharing Rules

Sharing solutions is allowed only after 24 hours have passed since release.

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Today's Challenge

Submissions (latest 3)

baloon

SOLVED!

Apr 12, 1:33 PM

shinyaaaaa

SOLVED!

Apr 12, 1:12 PM

muhammed

SOLVED!

Apr 12, 12:58 PM

Leaderboard

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Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

Upcoming challenges reveal the , , and in advance.

Jan 2026

Solved

Unsolved

Upcoming

Mon

Tue

Wed

Thu

Fri

Sat

Sun

kanon

one-p-rsa

Crypto

Easy

231 solves

soon-haari

RBG

Crypto

Very Hard

123 solves

admin

108

Misc

Easy

296 solves

admin

Happy New Year

Misc

Welcome

558 solves

kanon

super-tomato

Crypto

Easy

388 solves

hiikunz

Ruby Flag Checker

Rev

Easy

289 solves

minaminao

Fushigi Crawler

Web

Easy

343 solves

kurenaif

Encoding Basics

Misc

Crypto

Easy

317 solves

minaminao

jailiaj

Misc

Easy

282 solves

hiikunz

Square RSA

Crypto

Medium

235 solves

ark

secret-table

Web

Medium

270 solves

hiikunz

SwapSwap

Misc

Easy

286 solves

theoremoon

RSA2026

Crypto

Medium

209 solves

keymoon

crazython

Rev

Medium

188 solves

hiikunz

Basic Buffer Overflow

Pwn

Medium

186 solves

tchen

I wanna be the Admin

Web

Easy

283 solves

ark

free-comment

Misc

Hard

152 solves

hiikunz

Five Alpacas

Crypto

Easy

196 solves

k0080

Short Writer

Pwn

Hard

124 solves

minaminao

Base Length

Misc

Medium

157 solves

hiikunz

dice roll

Web

Medium

201 solves

chocorusk

ChaChaCha

Crypto

Medium

157 solves

k0080

system-v

Rev

Hard

118 solves

ark

dockerstack

Misc

Easy

180 solves

hiikunz

Animal Viewer

Web

Medium

154 solves

minaminao

Bashrunner

Misc

Hard

120 solves

yu212

Paca Paca Authenticator

Crypto

Medium

127 solves

tchen

Stateless Auth

Web

Medium

168 solves

keymoon

git gc

Misc

Medium

154 solves

chocorusk

ToyPQC

Crypto

Hard

108 solves

tchen

No JS

Web

Medium

132 solves

k0080

shellcode-101

Pwn

Medium

138 solves

yu212

Linear Coffee Generator

Crypto

Hard

115 solves

ark

optimal-sort

Misc

Hard

104 solves

admin

Camelidae

Misc

Welcome

388 solves

Want a harder challenge?

Go to B-SIDE

Writeups

Writeup for Daily AlpacaHack 4/5-4/11 kakur41 ja AES is dead +6 9 hours ago
Writeup for pacapaca sc tadanobutubutu ja pacapaca sc 19 hours ago
Writeup for Daily AlpacaHack 3/2-3/8 labpump ja Alert my Flag +6 yesterday
Writeup for No Content nozokare ja No Content yesterday
Writeup for Panic nozokare ja Panic yesterday
Writeup for AES is dead nozokare ja AES is dead yesterday
Writeup for AES is dead baumroll1234 ja AES is dead yesterday
Writeup for AES is dead 02loveslollipop en AES is dead yesterday
Writeup for AES is dead tadanobutubutu ja AES is dead yesterday
Writeup for 1️⃣ paulayground ko 1️⃣ 2 days ago

Rows:

wages of sin()

Topic: RelocationReleased: Feb 17, 2026

94 solves

Rev

Misc

Hard

Author:

rsk0315

People believe the behavior of math functions are environment-dependent.

wages-of-sin.tar.gz

description solves writeups