ETW Logging/Processing Option Disabled On IIS Server
Detects changes to of the IIS server configuration in order to disable/remove the ETW logging/processing option.
Detection logic
selection
EventID: 29
Configuration|endswith: "@logTargetW3C"
OldValue|contains: ETWfilter_main_etw_added
NewValue|contains: ETWCondition
selection and not 1 of filter_main_*Raw YAML
title: ETW Logging/Processing Option Disabled On IIS Server
id: a5b40a90-baf5-4bf7-a6f7-373494881d22
status: test
description: Detects changes to of the IIS server configuration in order to disable/remove the ETW logging/processing option.
references:
- https://learn.microsoft.com/en-us/iis/manage/provisioning-and-managing-iis/configure-logging-in-iis
- https://www.microsoft.com/en-us/security/blog/2022/12/12/iis-modules-the-evolution-of-web-shells-and-how-to-detect-them/
- https://learn.microsoft.com/en-us/iis/configuration/system.applicationhost/sites/sitedefaults/logfile/
author: frack113, Nasreddine Bencherchali
date: 2024-10-06
tags:
- attack.persistence
- attack.defense-impairment
- attack.t1685.001
- attack.t1505.004
logsource:
product: windows
service: iis-configuration
detection:
selection:
EventID: 29
Configuration|endswith: '@logTargetW3C'
OldValue|contains: 'ETW'
filter_main_etw_added:
NewValue|contains: 'ETW'
condition: selection and not 1 of filter_main_*
falsepositives:
- Legitimate administrator activity
level: mediumFalse positives
- Legitimate administrator activity
References
- https://learn.microsoft.com/en-us/iis/manage/provisioning-and-managing-iis/configure-logging-in-iis
- https://www.microsoft.com/en-us/security/blog/2022/12/12/iis-modules-the-evolution-of-web-shells-and-how-to-detect-them/
- https://learn.microsoft.com/en-us/iis/configuration/system.applicationhost/sites/sitedefaults/logfile/