Backdoor.Win32.Zombam.gen Cross Site Scripting

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/ff6516c881dee555b0cd253408b64404.txt  
Contact: [email protected]  
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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