full-disclosure - [FD] Backdoor.Win32.Hupigon.aspg / Insecure Service Path

Open Source and information security mailing list archives

Date: Tue, 6 Sep 2022 20:10:16 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Hupigon.aspg / Insecure Service Path

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source:
https://malvuln.com/advisory/121bf601275e2aed0c3a6fe7910f9826.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.aspg
Vulnerability: Insecure Service Path
Description: The malware creates a service with an unquoted path. Attackers
who can place an arbitrary executable named "Program.exe" under c:\ drive
can potentially undermine the malware by having it run theirs instead with
LocalSystem privs.
Family: Hupigon
Type: PE32
MD5: 121bf601275e2aed0c3a6fe7910f9826
Vuln ID: MVID-2022-0634
Disclosure: 09/06/2022

Exploit/PoC:
C:\dump>sc qc VServer_2007
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: VServer_2007
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 0   IGNORE
        BINARY_PATH_NAME   : C:\Program Files\Common Files\Microsoft
Shared\MSInfo\R_Server.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : V_Server
        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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