From this simplified problem you formulate equations for each bit from the plaintext to the cipher text. Plugging it into something like Z3 might be the easiest way of getting an answer out. Here's an article using Z3 to attack a simple hash function.
Every reverse engineer, malware analyst or simply a researcher eventually collects a set of utility software that they use on a daily basis to analyze, unpack, and crack other software. This article will cover mine. It will be useful to anyone who has not yet collected their own toolset and is just starting to look into the subject. However, an experienced reverse engineer must also be curious about what other crackers are using.
Reverse Engineering Code with IDA Pro is an authoritative book in the field of security, also one of the few classic tutorial books about reverse engineering coding! It expounds the essence of using IDA Pro to perform reverse engineering code cracking, detailedly and comprehensively tells how to use IDA Pro to excavate, analyze and then exploit the vulnerabilities, so as to implement reverse engineering.
A few weeks ago team-IRA released a crack for IDA pro 7.3 that didn't includethe decompilers. The read-me claims that the decompilers will be releasedshortly, but AFAIK this hasn't happened yet and now they seem busy with the 7.4release. If you are like me and don't mind using older decompilers for now thenthis is for you.A few years back there was a release by UNIS of three 7.0 decompilers(arm, arm64 and x86) patched to work with the leaked IDA pro 7.2.I have re-patched the three 7.0 decompilers and fully patched the 7.0 x64decompiler so that they work with the 7.3 team-IRA release. The patched decompilersuse a different configuration file, named _hexrays.cfg, so that you can use anyone of the 7.3 decompilers if you have them without conflict.This patch not only enables the decompilers but also allows plugins that use themto work as if they were the 7.3 decompilers. To verify this, I am including a dsyncplugin that syncs dissasembly and decompiler views with each other. The pluginrequires Ida 7.2 but works fully using the patch (use google to look for the gitdsync page).To my knowledge, this is the first 7.3 Ida pro with all 4 (7.0) decompilers release.A link to a totalvirus scan on the unencrypted rar is also included but as always I recommendrunning this in a secure environment (sandbox or virtual machine).
As for the good news, as some of you are aware, the patched 7.0 decompilers had a terrible flaw. Even though F5 and plugins that used hooks worked in IDA 7.3, plugins that used idaapi.decompile did not. I have tracked down the source of the error (argument incompatibility in the different versions of the hexrays decompiler library functions. For more info look at hexrays.hpp in the 7.3 and 7.0 SDK's) and patched them so that plugins using idaapi.decompile (compiled using the 7.3 SDK or idapython plugins) should work without a hitch. 2b1af7f3a8