HEUR.Trojan.Win32.Generic Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/a6916fb9b824e3d2edfe46be69ca2501.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: HEUR.Trojan.Win32.Generic  
Vulnerability: Insecure Permissions  
Description: The malware creates an 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: a6916fb9b824e3d2edfe46be69ca2501  
Vuln ID: MVID-2021-0338  
Dropped files: B6232F3A578.exe, 44160A754B496CC  
Disclosure: 09/09/2021  
  
  
Exploit/PoC:  
C:\>cacls Recycle.Bin  
C:\Recycle.Bin 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:\>cd Recycle.Bin  
  
C:\Recycle.Bin>dir  
Volume in drive C has no label.  
  
Directory of C:\Recycle.Bin  
  
09/01/2021 02:05 AM 9,004 44160A754B496CC  
02/10/2018 01:21 AM 204,800 B6232F3A578.exe  
  
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