Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/e865fc7225c84165d7aa0c7d8a1bcb77.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Acropolis.10
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: e865fc7225c84165d7aa0c7d8a1bcb77
Vuln ID: MVID-2021-0401
Disclosure: 11/21/2021

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


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

 Directory of C:\

11/14/2021  12:06 AM           385,024 Mainserver.exe
               1 File(s)        385,024 bytes


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