VulturiBuilder Insecure Permissions Vulnerability

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/ca294b2f778abc14fef6313b3cea7155.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: VulturiBuilder
Vulnerability: Insecure Permissions
Description: The malware writes an .EXE 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.
Type: PE32
MD5: ca294b2f778abc14fef6313b3cea7155
Vuln ID: MVID-2022-0457
Disclosure: 01/19/2022 


Exploit/PoC:
C:\>cacls hate.exe
C:\hate.exe BUILTIN\Administrators:(ID)F
            NT AUTHORITY\SYSTEM:(ID)F
            BUILTIN\Users:(ID)R
            NT AUTHORITY\Authenticated Users:(ID)C


C:\>dir hate.exe
 Volume in drive C has no label.

 Directory of C:\

01/11/2022  07:25 PM           298,496 hate.exe
               1 File(s)        298,496 bytes
               0 Dir(s)  27,531,624,448 bytes free