Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/423a5a63bed721e479c156b309bb58fd.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Virus.Win32.Sality.gen
Vulnerability: Insecure Permissions
Description: Sality.gen creates a dir named "z_Drivers" under c:\ drive and grants change (C) permissions to the authenticated user group. Standard users can rename the "svchost.exe" 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: 423a5a63bed721e479c156b309bb58fd
Vuln ID: MVID-2021-0141
Dropped files: svchost.exe
Disclosure: 03/23/2021

Exploit/PoC:
C:\>cacls \z_Drivers
C:\z_Drivers 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 z_Drivers
 Volume in drive C has no label.

 Directory of C:\z_Drivers

06/16/2012  01:14 AM           255,488 svchost.exe
               1 File(s)        255,488 bytes


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