Ransom.Win64.AtomSilo MVID-2022-0666 Cryptography Logic Flaw

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022Original source: https://malvuln.com/advisory/5559e9f5e1645f8554ea020a29a5a3ee.txtContact: [email protected]: twitter.com/malvulnBackup media: infosec.exchange/@malvulnThreat: Ransom.Win64.AtomSiloVulnerability: Crypto Logic FlawFamily: AtomSiloType: PE64MD5: 5559e9f5e1645f8554ea020a29a5a3eeVuln ID: MVID-2022-0666Disclosure: 12/14/2022Description: 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.docxTest.exe.pdfTested successfully in a virtual machine environment.PoC Video:https://www.youtube.com/watch?v=xyBt9Ppb-xcExploit/PoC:Create files with ".exe" within the filename.Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).