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Date: Fri, 22 Jan 2021 20:05:20 -0500
From: malvuln <>
Subject: [FD] Backdoor.Win32.Kraimer.11 / Missing Authentication

Discovery / credits: Malvuln - (c) 2021
Original source:

Threat: Backdoor.Win32.Kraimer.11
Vulnerability: Missing Authentication
Description: Kraimer listens for commands on TCP port 6668, due to a
lack of authentication anyone can telnet to the infected host. Seems
only one established connection at a time is allowed, so if you telnet
in then no other connections are honored. Therefore, if you make TCP
connection and  theres already an established connection you will get

Successful backdoor logon:

::KrAIMer 1.1::
 1) Help
 2) View Log File
 3) Start Key Logging
 4) Stop Key Logging
 5) Time/Date
 6) View Saved Passwords
 7) Reboot
 8) Quit

Type: PE32
MD5: 2a4fda4a6687981d32c2da7bdc1efcf1
Vuln ID: MVID-2021-0046
Disclosure: 01/22/2021


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