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Date: Tue, 26 Jan 2021 20:38:06 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Wollf.14 / Missing Authentication

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/ccd3e54eb76b3349db57481a0fe68b35.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wollf.14
Vulnerability: Missing Authentication
Description: Wollf.14 listens on TCP port 7614 and creates a service "wrm"
running as SYSTEM. The backdoor then allows casual intruders to take
control of the infected system as there is no authentication required.

C:\>sc qc wrm
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: wrm
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\WINDOWS\system32\wrm.exe -start
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Wollf Remote Manager
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem


Type: PE32
MD5: ccd3e54eb76b3349db57481a0fe68b35
Vuln ID: MVID-2021-0055
Dropped files: wrm.exe
Disclosure: 01/26/2021

Exploit/PoC:
TELNET BACKDOORED_HOST_IP 7614

"Wollf Remote Manager" v1.4

Code by wollf, http://www.xfocus.org



[DESKTOP-BLAHXO@C:\WINDOWS\system32]#


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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