Suspicious Removal of IIS WebServer Access Logs (via file_delete)

This rule detects the deletion of IIS WebServer access logs which may indicate an attempt to destroy forensic evidence

SigmamediumWindowsv1

sigma

suspicious-removal-of-iis-webserver-access-logs-via-file-delete

title: Suspicious Removal of IIS WebServer Access Logs (via file_delete)
id: c84e5d52-f194-5530-820b-0ce4499d4346
status: stable
description: This rule detects the deletion of IIS WebServer access logs which may indicate an attempt to destroy forensic evidence
references:
    - https://attack.mitre.org/techniques/T1070/
    - https://www.elastic.co/guide/en/security/current/webserver-access-logs-deleted.html
author: Huntrule Team
date: 2026-01-08
tags:
    - attack.stealth
    - attack.t1070
logsource:
    category: file_delete
    product: windows
detection:
    selection:
        TargetFilename|contains: '\inetpub\logs\LogFiles\'
        TargetFilename|endswith: '.log'
    condition: selection
falsepositives:
    - Unknown
level: medium

Known false positives

Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.