Backdoor.Win32.DarkKomet.bhfh Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/2e507b75c0df0fcb2f9a85f4a0c1bc04.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.DarkKomet.bhfh  
Vulnerability: Insecure Permissions  
Description: DarkKomet.bhfh creates a hidden insecure directory under c:\ drive granting change (C) permissions to the authenticated user group. The backdoor also drops an EXE named "ÚÈÏÇáÑÍãä.exe in that dir.  
Type: PE32  
MD5: 2e507b75c0df0fcb2f9a85f4a0c1bc04  
Vuln ID: MVID-2021-0097  
Dropped files: ÚÈÏÇáÑÍãä.exe  
Disclosure: 02/18/2021  
  
Exploit/PoC:  
C:\>dir /a \System  
Volume in drive C has no label.  
  
Directory of C:\System  
..  
06/14/2012 05:38 PM 730,112 ÚÈÏÇáÑÍãä.exe  
1 File(s) 730,112 bytes  
2 Dir(s) 48,290,029,568 bytes free  
  
C:\>cacls \System  
C:\System 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  
  
  
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