提出 #6354: BACKDOOR.WIN32.ONALF / Missing Authentication

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/ba815d409cd714c0eac010b5970f6408.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Onalf
Vulnerability: Missing Authentication
Description: WinRemoteShell (Onalf) listens for commands on TCP port 2020. Interestingly, it will only start listening once it can connect outbound to SMTP port 25. Not much of a self respecting backdoor, as it allows anyone to logon without requiring a password. After logon you are greeted with Welcome to WinRemoteShell(c)Chernickevich http://onehalf.hotmail.ru.
Type: PE32
MD5: ba815d409cd714c0eac010b5970f6408
Vuln ID: MVID-2021-0042
Disclosure: 01/20/2021

Exploit/PoC:
TELNET x.x.x.x 2020

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• ソース: ⚠️ https://www.malvuln.com/advisory/ba815d409cd714c0eac010b5970f6408.txt
• ユーザー: malvuln (UID 14984)
• 送信: 2021年01月21日 04:08 (5 年 ago)
• モデレーション: 2021年01月21日 08:05 (4 hours later)
• ステータス: 承諾済み
• VulDBエントリ: 168500 [Backdoor.Win32.Onalf Service Port 2020 弱い認証]
• ポイント: 20