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Date: Thu, 10 Jun 2021 22:06:12 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Zombam.gen / Cross Site Scripting (XSS)

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/ff6516c881dee555b0cd253408b64404.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Zombam.gen
Vulnerability: Cross Site Scripting (XSS)
Description: Zombam malware listens on TCP port 80 and deploys a HTML Web
UI for basic remote administration capability. One feature lists running
processes on the infected host using a GET request for /proc URL.

E.g.

{ welcome 2 HTTP_RAT infected computer }

menu [running processes] [browse] [computer info] [stop httprat] [have
suggestions?] [homepage]

running processez

[System Process]
System [kill]
smss.exe [kill]
csrss.exe [kill]
wininit.exe [kill]
csrss.exe [kill]
winlogon.exe [kill]

The malware fails to sanitize the URL and echoes back user controlled input
for the running processes webpages /proc menu link. Third-party attackers
can craft malicious HTML links to execute client side code in the security
context of the current user if they visit a malicious server or click the
infected link.

Type: PE32
MD5: ff6516c881dee555b0cd253408b64404
Vuln ID: MVID-2021-0243
Disclosure: 06/10/2021

Exploit/PoC:
http://x.x.x.x/%3Cscript%3Ealert(%22HYP3RLINX%22)%3C/script%3E&jusched.exe&


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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