Trojan-Dropper.Win32.Injector.aobl Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/842f6f21a2a83792e98900df90c9340b.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Dropper.Win32.Injector.aobl  
Vulnerability: Insecure Permissions  
Description: The malware creates a insecure dir named "winholder" 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: 842f6f21a2a83792e98900df90c9340b  
Vuln ID: MVID-2021-0187  
Dropped files: 8A4A89B415C.exe  
Disclosure: 04/27/2021  
  
Exploit/PoC:  
C:\>cacls winholder  
C:\winholder 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 winholder  
Volume in drive C has no label.  
  
Directory of C:\winholder  
  
02/10/2018 01:21 AM 3,485,392 8A4A89B415C.exe  
1 File(s) 3,485,392 bytes  
  
  
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