full-disclosure - [FD] Backdoor.Win32.Cafeini.b / Denial of Service

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Message-ID: <CAAHK0WQEFaekcTNAjzYKRFx7em4E-MM1eV=D8mu-motboWbveA@mail.gmail.com>
Date: Fri, 25 Mar 2022 21:54:01 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Cafeini.b / Denial of Service

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/b24c56abb4bde960c2d51d4e509d2c68.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Cafeini.b
Vulnerability: Denial of Service
Family: Cafeini
Type: PE32
MD5: b24c56abb4bde960c2d51d4e509d2c68
Vuln ID: MVID-2022-0525
Disclosure: 03/25/2022
Description: The malware listens on TCP port 51966 and is packed by a
modified UPX implementation. Third-party adversaries who can reach an
infected system can terminate the malware by issuing the cmd DIEDIEDIE,
without being required to authenticate.

UPX1:004560B4 aDiediedie      db 'DIEDIEDIE',0        ; DATA XREF:
sub_406C68:loc_40739E
UPX1:004560B4                                         ; sub_40DB4D+255B
UPX1:004560BE                 align 10h

Exploit/PoC:
C:\>nc64.exe x.x.x.x 51966
 CAFEiNi 1.1
Enter your password:
DIEDIEDIE

Disclaimer: The information contained within this advisory is supplied
"as-is" with no warranties or guarantees of fitness of use or 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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