Backdoor.Win32.Kraimer.11 malware has a backdoor on TCP/6668 that does not require any authentication.
ab7914a32014a552e8902d32415b1aedDiscovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/2a4fda4a6687981d32c2da7bdc1efcf1.txt
Contact: [email protected]
Media: twitter.com/malvuln
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 refused.
Successful backdoor logon:
::KrAIMer 1.1::
-----MENU-----
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
Exploit/PoC:
TELNET MALWARE_HOST_IP 6668
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