Salsa20 is a stream cipher used by various ransomware software: https://appuals.com/grandcrab-ransomware-v4-1-2-theft-prevented-with-salsa20-algorithm/https://blogs.keysight.com/blogs/tech/nwvs.entry.html/2021/05/18/darkside_ransomware-QfsV.htmlhttps://www.acronis.com/en-us/articles/sodinokibi-ransomware/ I took a similar approach to the rules in previous posts to find MD5 and SHA256 implementations. I found a constant by reading the source code of a Salsa20 implementation on GitHub and looking for unique constants: https://github.com/alexwebr/salsa20/blob/master/salsa20.c#L118-L125 This was able to detect Sodinokibi …
DMFR SECURITY 