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Chaos MVID-2022-0456 Ransomware Builder 4 Insecure Permissions

Chaos MVID-2022-0456 Ransomware Builder 4 Insecure Permissions
Posted Jan 17, 2022
Authored by malvuln | Site malvuln.com

Chaos Ransomware Builder version 4 malware suffers from an insecure permissions vulnerability.

tags | exploit
SHA-256 | 3b8c7aefa78b4a1ce509e8c113d2ccf71d9f2347f2e85d39b9e7b4a684526cb8

Chaos MVID-2022-0456 Ransomware Builder 4 Insecure Permissions

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Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/8b855e56e41a6e10d28522a20c1e0341.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Chaos Ransomeware Builder v4
Vulnerability: Insecure Permissions
Description: The malware writes an .EXE with insecure permissions under c:\ drive granting change (C) permissions to the authenticated user group. Standard users can rename the executable dropped by the malware to disable it or replace it with their own executable. Then wait for a privileged user to logon to the infected machine to potentially escalate privileges.
Type: PE32
MD5: 8b855e56e41a6e10d28522a20c1e0341
Vuln ID: MVID-2022-0456
Disclosure: 01/16/2022

Exploit/PoC:
C:\>cacls hate.exe
C:\hate.exe BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C

C:\>dir hate.exe
Volume in drive C has no label.

Directory of C:\

01/11/2022 10:08 PM 23,040 hate.exe
1 File(s) 23,040 bytes

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).
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