Sigma rule: Successful IIS Shortname Fuzzing Scan

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-fc9db710a125, updated 2023-01-02T00:00:00.000Z.

Rule

Title: Successful IIS Shortname Fuzzing Scan
Status: test
Level: medium
Author: frack113
Date: 2021-10-06
Modified: 2023-01-02
File: rules/web/webserver_generic/web_iis_tilt_shortname_scan.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

When IIS uses an old .Net Framework it's possible to enumerate folders with the symbol "~"

Log source

category: webserver

Detection

selection:
    cs-uri-query|contains: '~1'
    cs-uri-query|endswith: 'a.aspx'
    cs-method:
        - GET
        - OPTIONS
    # Success only
    sc-status:
        - 200
        - 301
condition: selection

False positives (as the rule lists them)

Unknown

MITRE ATT&CK ids this rule names

T1190

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/web/webserver_generic/web_iis_tilt_shortname_scan.yml

Sources and licences

SigmaHQ
"Successful IIS Shortname Fuzzing Scan" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/web/webserver_generic/web_iis_tilt_shortname_scan.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: Successful IIS Shortname Fuzzing Scan",
entity page, dataset version ref-fc9db710a125, updated 2023-01-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/7cb02516-6d95-4ffc-8eee-162075e111ac (accessed 2026-11-03).
Underlying source: SigmaHQ rule 7cb02516-6d95-4ffc-8eee-162075e111ac, 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.