Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/378b225b07979e12062f86ab1fbaf2ed.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wuca.nz
Vulnerability: Insecure Permissions
Description: The malware creates a VBS script "112.vbe" 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: 378b225b07979e12062f86ab1fbaf2ed
Vuln ID: MVID-2021-0241
Dropped files: 112.vbe
Disclosure: 06/08/2021

Exploit/PoC:
C:\>cacls 112.vbe
C:\112.vbe BUILTIN\Administrators:(ID)F
           NT AUTHORITY\SYSTEM:(ID)F
           BUILTIN\Users:(ID)R
           NT AUTHORITY\Authenticated Users:(ID)C


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