full-disclosure - [FD] Worm.Win32.Fasong.c / Insecure Service Path

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Message-ID: <CAAHK0WSkCekLPJ7G1GrPKrnR=Uouq9pLrqCP-O=7+1NXWhqOxg@mail.gmail.com>
Date: Fri, 15 Oct 2021 13:37:12 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Worm.Win32.Fasong.c / Insecure Service Path

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/bc6f4a283b6b8308c60bb70cc81edfd8.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Worm.Win32.Fasong.c
Vulnerability: Insecure Service Path
Description: The malware creates a service with an unquoted path. Third
party attackers who can place an arbitrary executable under c:\ drive can
potentially undermine the integrity of the malware by having it run theirs
instead with SYSTEM privs.
Type: PE32
MD5: bc6f4a283b6b8308c60bb70cc81edfd8
Vuln ID: MVID-2021-0363
Dropped files: QIRNJ.EXE
Disclosure: 10/15/2021

Exploit/PoC:
C:\>sc qc VGUPL.EXE
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: VGUPL.EXE
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\VGUPL.EXE
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : VGUPL.EXE
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

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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