Windows System Binary Proxy Execution MSIExec

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Description

Adversaries may abuse msiexec.exe to proxy execution of malicious payloads. Msiexec.exe is the command-line utility for the Windows Installer and is thus commonly associated with executing installation packages (.msi).

• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint, Endpoint_Processes
• Last Updated: 2022-06-16
• Author: Michael Haag, Splunk
• ID: bea2e16b-4599-46ad-a95b-116078726c68

Narrative

Adversaries may abuse msiexec.exe to launch local or network accessible MSI files. Msiexec.exe can also execute DLLs. Since it may be signed and native on Windows systems, msiexec.exe can be used to bypass application control solutions that do not account for its potential abuse. Msiexec.exe execution may also be elevated to SYSTEM privileges if the AlwaysInstallElevated policy is enabled.

Detections

Name	Technique	Type
Windows MSIExec DLLRegisterServer	Msiexec	TTP
Windows MSIExec Remote Download	Msiexec	TTP
Windows MSIExec Spawn Discovery Command	Msiexec	TTP
Windows MSIExec Unregister DLLRegisterServer	Msiexec	TTP
Windows MSIExec With Network Connections	Msiexec	TTP
Windows System Binary Proxy Execution MSIExec DLLRegisterServer	Msiexec	TTP
Windows System Binary Proxy Execution MSIExec Remote Download	Msiexec	TTP
Windows System Binary Proxy Execution MSIExec Unregister DLL	Msiexec	TTP

Reference

• https://attack.mitre.org/techniques/T1218/007/

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