Win32.Ransom.Conti 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.
d9c0e9406b722512df44cebb17c86eb5064420bbea72fa35eda62ac98a591282Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/99e55ce93392068c970384ab24a0e13d.txt
Contact: [email protected]
Media: twitter.com/malvuln
Backup media: infosec.exchange/@malvuln
Threat: Win32.Ransom.Conti
Vulnerability: Crypto Logic Flaw
Description: Conti 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, others variants are unknown as they were not yet tested.
E.g.
Test.exe.docx
Test.exe.pdf
Tested successfully in a virtual machine environment.
Family: Conti
Type: PE32
MD5: 99e55ce93392068c970384ab24a0e13d
Vuln ID: MVID-2022-0662
Disclosure: 11/25/2022
Video PoC URL:
https://www.youtube.com/watch?v=rjxCII_e6xQ
Exploit/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).