Trojan-Downloader.Win32.Small.ahlq Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/d859ba54086fd0313dc34b73b5b1eccb.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Downloader.Win32.Small.ahlq  
Vulnerability: Insecure Permissions   
Description: the malware creates a directory with insecure permissions under c drive granting 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.   
Family: Small  
Type: PE32  
MD5: d859ba54086fd0313dc34b73b5b1eccb  
Vuln ID: MVID-2022-0567  
Disclosure: 04/26/2022  
  
  
Exploit/PoC:  
C:\>cacls Temp  
C:\Temp 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 Temp  
Volume in drive C has no label.  
  
Directory of C:\Temp  
  
04/14/2022 04:03 AM 761,344 vjrgq12Server_Setup.exe  
1 File(s) 761,344 bytes  
  
  
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