full-disclosure - [FD] Backdoor.Win32.Kraimer.11 / Missing Authentication

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Message-ID: <CAAHK0WSsyy23dykwNAsyFLMwSveewMnKqMbECisKE--mW3t_Vw@mail.gmail.com>
Date: Fri, 22 Jan 2021 20:05:20 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Kraimer.11 / Missing Authentication

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/2a4fda4a6687981d32c2da7bdc1efcf1.txt
Contact: malvuln13@...il.com
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

Disclaimer: The information contained within this advisory is supplied
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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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