Detection rules › Sigma
Suspicious Execution of InstallUtil Without Log
Uses the .NET InstallUtil.exe application in order to execute image without log
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Suspicious Execution of InstallUtil Without Log
id: d042284c-a296-4988-9be5-f424fadcc28c
status: test
description: Uses the .NET InstallUtil.exe application in order to execute image without log
references:
- https://securelist.com/moonbounce-the-dark-side-of-uefi-firmware/105468/
- https://learn.microsoft.com/en-us/dotnet/framework/tools/installutil-exe-installer-tool
author: frack113
date: 2022-01-23
modified: 2022-02-04
tags:
- attack.stealth
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith: '\InstallUtil.exe'
Image|contains: 'Microsoft.NET\Framework'
CommandLine|contains|all:
- '/logfile= '
- '/LogToConsole=false'
condition: selection
falsepositives:
- Unknown
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith: '\InstallUtil.exe'
Image|contains: 'Microsoft.NET\Framework'
CommandLine|contains|all:
- '/logfile= '
- '/LogToConsole=false'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | ends_with |
| field:"Image" kind:ends_with value:"\InstallUtil.exe" |
Image | match |
| field:"Image" kind:match value:"Microsoft.NET\Framework" |