Sigma rule: HackTool - Empire UserAgent URI Combo

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-7ea4faaaa94b, updated 2024-02-26T00:00:00.000Z.

Rule

Title
HackTool - Empire UserAgent URI Combo
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2020-07-13
Modified
2024-02-26
File
rules/web/proxy_generic/proxy_hktl_empire_ua_uri_patterns.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects user agent and URI paths used by empire agents

Log source

category
proxy

Detection

selection:
    c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko'
    cs-uri:
        - '/admin/get.php'
        - '/news.php'
        - '/login/process.php'
    cs-method: 'POST'
condition: selection

False positives (as the rule lists them)

  • Valid requests with this exact user agent to server scripts of the defined names

Tags

  • attack.command-and-control
  • attack.t1071.001

MITRE ATT&CK ids this rule names

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/proxy_generic/proxy_hktl_empire_ua_uri_patterns.yml

Sources and licences

  • SigmaHQ

    "HackTool - Empire UserAgent URI Combo" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/web/proxy_generic/proxy_hktl_empire_ua_uri_patterns.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: HackTool - Empire UserAgent URI Combo",
entity page, dataset version ref-7ea4faaaa94b, updated 2024-02-26T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/b923f7d6-ac89-4a50-a71a-89fb846b4aa8 (accessed 2026-11-03).
Underlying source: SigmaHQ rule b923f7d6-ac89-4a50-a71a-89fb846b4aa8, 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.