Backdoor.Win32.Acropolis.10 / Insecure Permissions

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/c3e2bbe5dca96687422f2b4e8c80f4ce.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Acropolis.10
Vulnerability: Insecure Permissions
Description: The malware writes a PE 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: c3e2bbe5dca96687422f2b4e8c80f4ce
Vuln ID: MVID-2022-0497
Disclosure: 02/22/2022

Exploit/PoC:
C:\>cacls Mainserver.exe
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:\

02/22/2022  10:11 PM           385,024 Mainserver.exe
               1 File(s)        385,024 bytes
               0 Dir(s)  24,994,226,176 bytes free


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