full-disclosure - [FD] Trojan.Win32.Akl.bc / Insecure Permissions

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Message-ID: <CAAHK0WQvo0f5VdKh1Z0tVqutsqgnO3yHg1tDD+W8OXVzGjmCUw@mail.gmail.com>
Date: Wed, 27 Oct 2021 21:05:59 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Trojan.Win32.Akl.bc / Insecure Permissions

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/0b2a0f61a209e24a7d7b2c2d5efb4d68.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Akl.bc
Vulnerability: Insecure Permissions
Description: The malware creates an dir named "LMPITF" with insecure
permissions under Windows\SysWOW64 granting full (F) permissions to the
Everyone 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: 0b2a0f61a209e24a7d7b2c2d5efb4d68
Vuln ID: MVID-2021-0370
Dropped files: AKV.exe, QPM.exe
Disclosure: 10/27/2021

Exploit/PoC:
C:\>cacls C:\Windows\SysWOW64\LMPITF
C:\Windows\SysWOW64\LMPITF Everyone:F
                           Everyone:(OI)(CI)(IO)F

C:\>dir C:\Windows\SysWOW64\LMPITF
 Volume in drive C has no label.

 Directory of C:\Windows\SysWOW64\LMPITF

10/16/2021  10:31 PM           467,456 AKV.exe
10/16/2021  10:31 PM            62,464 QPM.001
10/16/2021  10:31 PM            44,032 QPM.002
10/16/2021  10:31 PM             1,602 QPM.004
10/16/2021  10:31 PM         1,544,192 QPM.exe
               5 File(s)      2,119,746 bytes

Disclaimer: The information contained within this advisory is supplied
"as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author. The author is not responsible for any misuse of the information
contained herein and accepts no responsibility for any damage caused by the
use or misuse of this information. The author prohibits any malicious use
of security related information or exploits by the author or elsewhere. Do
not attempt to download Malware samples. The author of this website takes
no responsibility for any kind of damages occurring from improper Malware
handling or the downloading of ANY Malware mentioned on this website or
elsewhere. All content Copyright (c) Malvuln.com (TM).

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