Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/1c255ef6fd44877700867f94a59875d2.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Email-Worm.Win32.Lama
Vulnerability: Insecure Permissions
Description: The malware writes a ".BAT" file 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: 1c255ef6fd44877700867f94a59875d2
Vuln ID: MVID-2022-0491
Disclosure: 02/16/2022

Exploit/PoC:
C:\>cacls "Alma Destructora.bat"
C:\Alma Destructora.bat BUILTIN\Administrators:(ID)F
                        NT AUTHORITY\SYSTEM:(ID)F
                        BUILTIN\Users:(ID)R
                        NT AUTHORITY\Authenticated Users:(ID)C


C:\>dir "Alma Destructora.bat"
 Volume in drive C has no label.

 Directory of C:\

02/10/2022  12:37 AM                48 Alma Destructora.bat
               1 File(s)             48 bytes
               0 Dir(s)  26,840,838,144 bytes free


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