Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/7588da376f496aa678cdfca4e404f38a.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Servstar.poa
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: 7588da376f496aa678cdfca4e404f38a
Vuln ID: MVID-2021-0397
Dropped files: Random named e.g. waqqoo.exe, iigkie.exe
Disclosure: 11/07/2021


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

SERVICE_NAME: MSUpdqtewux
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 0   IGNORE
        BINARY_PATH_NAME   : C:\Program Files\iigkie.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Microsoft Windows Uqdateouq Service
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem


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