HTTP Logging Disabled On IIS Server — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: high. Source dates: 2024-10-06 / not supplied.

{
  "product": "windows",
  "service": "iis-configuration"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 25b0f98b5c1b867ac81d5acec73f27a33e1a8120aa5899f835684399db2d8bcb

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: HTTP Logging Disabled On IIS Server
id: e8ebd53a-30c2-45bd-81bb-74befba07bdb
status: test
description: Detects changes to of the IIS server configuration in order to disable HTTP logging for successful requests.
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.webserver/httplogging
author: frack113
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: '/system.webServer/httpLogging/@dontLog'
        NewValue: 'true'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source 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.webserver/httplogging