Autore Topic: Metame - Metame Is A Metamorphic Code Engine For Arbitrary Executables  (Letto 4 volte)

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Metame - Metame Is A Metamorphic Code Engine For Arbitrary Executables
« Risposta #1 il: Settembre 11, 2019, 02:16:40 pm »
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Metame - Metame Is A Metamorphic Code Engine For Arbitrary Executables

metame is a simple metamorphic code engine for arbitrary executables.
From Wikipedia:
Metamorphic code is code that when run outputs a logically equivalent  version of its own code under some interpretation.  This is used by computer viruses to avoid the pattern recognition of  anti-virus software.
metame implementation works this way:
  1. Open a given binary and analyze the code
  2. Randomly replace instructions with equivalences in logic and size
  3. Copy and patch the original binary to generate a mutated variant

It currently supports the following architectures:
  • x86 32 bits
  • x86 64 bits
Also, it supports a variety of file formats, as radare2 is used for  file parsing and code analysis.
Example of code before and after mutation:


Hint: Two instructions have been replaced in this snippet.
Here another example on how it can mutate a NOP sled into equivalent code:


Installation
pip install metame
This should also install the requirements.
You will also need radare2. Refer to the official website for  installation instructions.
simplejson is also a "nice to have" for a small performance  boost:
pip install simplejson

Usage
metame -i original.exe -o mutation.exe -d
Use metame -h for help.



Source: Metame - Metame Is A Metamorphic Code Engine For Arbitrary Executables


Ruggero Respigo , dottore commercialista a Milano, svolge dal 1979 l’attività di  Libero Professionista e Consulente aziendale per le maggiori aziende italiane ed estere. https://www.ruggerorespigo.it

 

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