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Date: Thu, 7 Jan 2021 23:40:35 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Agent.dcbh / Insecure Permissions EoP

Discovery / credits: malvuln - Malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/bba63df41adcf2cf80c74e4a62539d44.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Agent.dcbh
Vulnerability: Insecure Permissions EoP
Description: Drops an executable with a randomly generated numeric name
E.g. 674_674.exe. Change permissions are granted to authenticated users,
allowing privilege escalation.
Type: PE32
MD5: bba63df41adcf2cf80c74e4a62539d44
Vuln ID: MVID-2021-0016
Dropped files: Random numeric named .EXE under c:\ dir.
Disclosure: 01/08/2021

Exploit/Poc:
C:\>cacls C:\989_989.exe
C:\989_989.exe BUILTIN\Administrators:(ID)F
               NT AUTHORITY\SYSTEM:(ID)F
               BUILTIN\Users:(ID)R
               NT AUTHORITY\Authenticated Users:(ID)C


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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