Authors: Jason Reaves
Crypters and packers are common in the malware world, lots of tech- niques have been invented over the years to help people bypass security measures commonly used. One such technique where a crypter will use multiple, sometimes dynamically generated, layers to decode and unpack the protected executable allows a crypter to bypass common security mea- sures such as Antivirus. While at the end of this paper we will have con- structed a working proof of concept for an unpacker it is by no means meant as a production level mechanism, the goal is simply to show the reversing of routines found in a crypter while using a reverse-engineering framework that is geared towards shellcode analysis to our benefit for malware analysis.
Comments: 8 Pages.
[v1] 2017-06-18 19:03:08
Unique-IP document downloads: 12 times
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