Trojan-Dropper.Win32.Agent.wxl / Insecure Permissions

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/8b17a68d7b2291f217b63e0377ee2b3a.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Trojan-Dropper.Win32.Agent.wxl
Vulnerability: Insecure Permissions
Description: The malware creates a dir with insecure permissions under c:\
drive and grants 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: 8b17a68d7b2291f217b63e0377ee2b3a
Vuln ID: MVID-2021-0273
Dropped files: 1.bat, 1.dll
Disclosure: 07/03/2021

Exploit/PoC:
C:\>cacls AntivirAsistant
C:\AntivirAsistant 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


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

 Directory of C:\AntivirAsistant

06/27/2021  02:57 AM                38 1.bat
06/27/2021  02:57 AM           194,560 1.dll
               2 File(s)        194,598 bytes


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