2014weight 15.00ASIS

ASIS CTF Quals 2014

39 challenges with 108 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.

Full task list on CTFtime

Uncategorised20

The upstream scoreboard did not say, so neither do we.

Solve it with:Cipher identifier and automatic decoder Learn: Recognising encodings

100
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
2
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Auth
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Bomb
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Censored Array
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Easy Reading
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Ecc
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Hurdling
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Impenetrable
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Malware
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Merkle Hellman Attacks
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Mesa System
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Milad Tower
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Picxoralpha
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Serial Number
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Trivia 1
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Trivia 2
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Undistorted History
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Weak Password
2 official solutions
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
Winner (Trivia 20) [ENG]
2 official solutions
Also written up in: singularityctf.blogspot.ru, singularityctf.blogspot.com

Forensics5

Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.

Solve it with:File type identifier by magic bytes Magic byte and file signature table PCAP analyzer for CTF network forensics EXIF metadata viewer Learn: File forensics and carving Learn: Network forensics

Toq-Toq
100 pts2 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
prying ears
175 pts2 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
Forensic
150 pts3 writeups
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
150) [ENG]
2 official solutions
Also written up in: singularityctf.blogspot.ru, singularityctf.blogspot.com
Forensic2
300 pts1 writeup
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r

Steganography5

Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.

Solve it with:LSB steganography extractor PNG chunk analyzer Audio spectrogram and SSTV decoder Zero-width character and text steganography decoder Learn: Steganography

Tortureous sound
75 pts2 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- trivia
- stego
Same technique in picoCTF: StegoRSA, Glory of the Garden, Investigative Reversing 0
Spy Paper
100 pts2 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- stego
- forensics
Same technique in picoCTF: StegoRSA, Glory of the Garden, Investigative Reversing 0
Sound Zoo
150 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- stego
Same technique in picoCTF: StegoRSA, Glory of the Garden, Investigative Reversing 0
Blocks
100 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- stego
- crypto
Same technique in picoCTF: StegoRSA, Glory of the Garden, Investigative Reversing 0
White noise
175 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- stego
Same technique in picoCTF: StegoRSA, Glory of the Garden, Investigative Reversing 0

Cryptography4

Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.

Solve it with:Cipher identifier and automatic decoder Vigenere cipher solver with automatic key recovery RSA decryption and attack runner Wiener’s attack on small RSA private exponents In-browser hash cracker with rule transforms Learn: Classical ciphers and frequency analysis Learn: RSA and the parameters that break it

Random Image
150 pts4 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Archaic
300 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Plough
250 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Strange
100 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC

Misc3

Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.

Solve it with:Brainfuck and esolang decoder Cipher identifier and automatic decoder Regex tester with match offsets and capture groups Learn: Recognising encodings

Image
50 pts3 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- trivia
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Gas stations
225 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- ppc
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
winner
20 pts1 writeup
Also written up in: ctfs/write-ups-2014, ctfs/write-ups
- trivia
Same technique in picoCTF: PW Crack 2, Permissions, Specialer

Web2

Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.

Solve it with:JWT decoder and signature verifier JWT alg=none bypass generator Web attack payload catalog JWT secret brute force Learn: Sessions, tokens and access control

Hidden flag
75 pts6 writeups
Also written up in: ctfs/write-ups-2014, ctfs/write-ups, akaminsky.net
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA
Hidden flag (Web 75) [ENG]
2 official solutions
Also written up in: singularityctf.blogspot.ru, singularityctf.blogspot.com

Uncategorised20

100

2

Auth

Bomb

Censored Array

Easy Reading

Ecc

Hurdling

Impenetrable

Malware

Merkle Hellman Attacks

Mesa System

Milad Tower

Picxoralpha

Serial Number

Trivia 1

Trivia 2

Undistorted History

Weak Password

Winner (Trivia 20) [ENG]

Forensics5

Toq-Toq

prying ears

Forensic

150) [ENG]

Forensic2

Steganography5

Tortureous sound

Spy Paper

Sound Zoo

Blocks

White noise

Cryptography4

Random Image

Archaic

Plough

Strange

Misc3

Image

Gas stations

winner

Web2

Hidden flag

Hidden flag (Web 75) [ENG]

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