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Trojan.Win32.Scar.dulk MVID-2021-0227 Insecure Permissions

Trojan.Win32.Scar.dulk MVID-2021-0227 Insecure Permissions
Posted May 29, 2021
Authored by malvuln | Site malvuln.com

Trojan.Win32.Scar.dulk malware suffers from an insecure permissions vulnerability.

tags | exploit, trojan
systems | windows
SHA-256 | cbd8ec549f7fbd1dd0daf13796d11776585e8b3c0ff98930ced6d586c8924356

Trojan.Win32.Scar.dulk MVID-2021-0227 Insecure Permissions

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/317cd84b5c0d11a9c3aacdfe2bb6031c.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Scar.dulk
Vulnerability: Insecure Permissions
Description: The malware creates an insecure dir named "xzzzs" under c:\ drive and grants change (C) permissions to the authenticated user group. Standard users can rename the executables 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: 317cd84b5c0d11a9c3aacdfe2bb6031c
Vuln ID: MVID-2021-0227
Dropped files: zxzz.exe
Disclosure: 05/28/2021

Exploit/PoC:
C:\>dir xzzzs
Volume in drive C has no label.

Directory of C:\xzzzs

03/02/2021 02:08 AM 434,688 zxzz.exe
1 File(s) 434,688 bytes

C:\>cacls xzzzs
C:\xzzzs BUILTIN\Administrators:(OI)(CI)(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F
BUILTIN\Users:(OI)(CI)(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C


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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