Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/21f324a6a62d8125bc83b8d1865e17f9.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.acio
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: 21f324a6a62d8125bc83b8d1865e17f9
Vuln ID: MVID-2021-0372
Dropped files: IEload.exe
Disclosure: 10/27/2021


Exploit/PoC:
C:\>sc qc "Win32Help"
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: Win32Help
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 0   IGNORE
        BINARY_PATH_NAME   : C:\Program Files (x86)\Internet Explorer\Connection Wizard\IEload.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Windows Help Client
        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).