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Hell86 - ttlhacker

Hell86 Author : ttlhacker Language : Assembler Upload : 8:03 PM 10/12/2018 Level : 3 Platform : Unix/Linux etc. Crackme : 1Desc: 2 3 - x86_64 linux binary (tested on debian 9 and ubuntu 18.04, should run on any distro). 4 - Takes one command line argument and outputs "OK!" if it's correct, "Wrong" if it's not. 5 - Partially written in C, actual verification routine is assembly. Read more

Reversing a malware in disguise

My Friend recommended this Super Awesome game and obviously it was downloaded from a random website from the internet ( some ripoff of the ). The contents of the are as follows : -

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Challenge: REPYC [REV] - 147 Points

Challenge Description:

  • woo thi chal sooo repyc!
  • File: 3nohtyp.pyc
  • Difficulty estimate: Easy

We are given a pyc file and running file on this pyc reveals that its a python 3.6 compiled python bytecode.

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HSCTF License

Challenge: License [ 298(DYN) RE ]

Challenge Description:

Written by: ItzSomebody


Keith made a cool license-checking program but he forgot the flag he used to create the key! To make matters worse, he lost the source code and stripped the binary for his license-generator program. Can you help Keith recover his flag? All he knows is:

  • The license key is 4-EZF2M-7O5F4-V9P7O-EVFDP-E4VDO-O
  • He put his name (in the form of ‘k3ith’) as the first part of the flag
  • There are 3 underscores
  • The flag is in the format hsctf{}
  • The flag doesn’t have random character sequences (you should be able to read the
  • entire flag easily).
  • The flag only contains lowercase English letters and numbers.
  • The generator might produce the same keys for different inputs because Keith was too lazy to write the algorithm properly.
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