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Date: Fri, 28 May 2021 23:13:37 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Netbus.12 / Unauthenticated Information
	Disclosure

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/d9822984ed546cbf3ccffd149d1d2af5.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Netbus.12
Vulnerability: Unauthenticated Information Disclosure
Description: The malware listens on TCP ports 12345, 12346. Unauthenticated
third-party attackers who can reach infected system can grab screen
captures by simply connecting to port 12346. Once connected it will dump a
screen capture, using Windows command line redirection operator ">" we can
save the output locally. Opening the dumped output in text-file format we
find the header "JFIF" for JPEG file format. Therefore, using the .jpeg
file extension when saving the output will allow you to view the victims
machine by opening the image.
Type: PE32
MD5: d9822984ed546cbf3ccffd149d1d2af5
Vuln ID: MVID-2021-0230
Dropped files:
Disclosure: 05/28/2021

Exploit/PoC:
nc64.exe x.x.x.x 12346 > screendump.jpeg

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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