Ransom.Win64.AtomSilo malware suffers from a cryptography logic flaw.
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/5559e9f5e1645f8554ea020a29a5a3ee.txt
Contact: [email protected]
Media: twitter.com/malvuln
Backup media: infosec.exchange/@malvuln
Threat: Ransom.Win64.AtomSilo
Vulnerability: Crypto Logic Flaw
Family: AtomSilo
Type: PE64
MD5: 5559e9f5e1645f8554ea020a29a5a3ee
Vuln ID: MVID-2022-0666
Disclosure: 12/14/2022
Description: AtomSilo ransomware FAILS to encrypt non PE files that have a ".exe" in the filename. Creating specially crafted file names successfully evaded encryption for this malware sample.
E.g.
Test.exe.docx
Test.exe.pdf
Tested successfully in a virtual machine environment.
PoC Video:
https://www.youtube.com/watch?v=xyBt9Ppb-xc
Exploit/PoC:
Create files with ".exe" within the filename.
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