Sigma rule: IIS WebServer Access Logs Deleted

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d5926b214e80, updated 2023-02-15T00:00:00.000Z.

Rule

Title
IIS WebServer Access Logs Deleted
Status
test
Level
medium
Author
Tim Rauch (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Date
2022-09-16
Modified
2023-02-15
File
rules/windows/file/file_delete/file_delete_win_delete_iis_access_logs.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
file_delete

Detection

selection:
    TargetFilename|contains: '\inetpub\logs\LogFiles\'
    TargetFilename|endswith: '.log'
condition: selection

False positives (as the rule lists them)

  • During uninstallation of the IIS service
  • During log rotation

Tags

  • attack.stealth
  • attack.t1070

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_delete/file_delete_win_delete_iis_access_logs.yml

Sources and licences

  • SigmaHQ

    "IIS WebServer Access Logs Deleted" by Tim Rauch (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_delete/file_delete_win_delete_iis_access_logs.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: IIS WebServer Access Logs Deleted",
entity page, dataset version ref-d5926b214e80, updated 2023-02-15T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/3eb8c339-a765-48cc-a150-4364c04652bf (accessed 2026-11-03).
Underlying source: SigmaHQ rule 3eb8c339-a765-48cc-a150-4364c04652bf, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.