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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
tchentchen
Xwitter
Web
Hard
0 solves
Submissions (latest 3)No submissions yet.
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🌱
2,150 solves
Upcoming challenges reveal the , , and in advance.
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Aug 2026

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27
tchentchen
RFC100008
Web
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28
2501
One More Approval
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zen.zip
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tchentchen
Small Image Uploader 2
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1
admin
Día Nacional de la Alpaca
Misc
Welcome🌱
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2
2501
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pppp4649pppp4649
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hiikunzhiikunz
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tchentchen
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Misc
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tchentchen
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11-12
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tchentchen
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tchentchen
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tchentchen
List Sharing
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18-20
tan90909090tan90909090
wrong instruction
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tchentchen
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24-26
tchentchen
Xwitter
Web
Hard
0 solves
27
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31
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Writeups

Writeup for wrong instruction

umineko

ja
wrong instruction

2026/08/22 05:08

power

Writeup for Leaked Flag Checker

ja

2026/08/18 11:53

power

Writeup for Password, Please

ja

2026/08/18 03:26

Rows:

Flag Printer 2026

Topic: NetworkReleased: Mar 4, 2026

254 solves
Misc
Easy🌱3.0

by

minaminao

minaminao

f ~~~~~~~~~~~~~~~~~~~~ l ~~~~~~~~~~~~~~~~~~~~ a ~~~~~~~~~~~~~~~~~~~~ g ~~~~~~~~~~~~~~~~~~~~

Beginner Hint
  • When you connect using nc, you can see that the part of the flag after Alpaca{ is not printed.
  • If you read the Dockerfile, you may understand why this happens.
flag-printer-2026.tar.gz

Please sign in to submit the flag.

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