Sigma rule: Suspicious External WebDAV Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-35d940b58c1e, updated 2024-05-10T00:00:00.000Z.

Rule

Title
Suspicious External WebDAV Execution
Status
test
Level
high
Author
Ahmed Farouk
Date
2024-05-10
File
rules/web/proxy_generic/proxy_webdav_external_execution.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects executables launched from external WebDAV shares using the WebDAV Explorer integration, commonly seen in initial access campaigns.

Log source

category
proxy

Detection

selection_webdav:
    c-useragent|startswith: 'Microsoft-WebDAV-MiniRedir/'
    cs-method: 'GET'
selection_execution:
    c-uri|endswith:
        - '.7z'
        - '.bat'
        - '.dat'
        - '.cmd'
        - '.exe'
        - '.js'
        - '.lnk'
        - '.ps1'
        - '.rar'
        - '.url'
        - '.vbe'
        - '.vbs'
        - '.zip'
filter_main_local_ips:
    dst_ip|cidr:
        - '127.0.0.0/8'
        - '10.0.0.0/8'
        - '172.16.0.0/12'
        - '192.168.0.0/16'
        - '169.254.0.0/16'
        - '::1/128'  # IPv6 loopback
        - 'fe80::/10'  # IPv6 link-local addresses
        - 'fc00::/7'  # IPv6 private addresses
condition: all of selection_* and not 1 of filter_main_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.initial-access
  • attack.resource-development
  • attack.t1584
  • attack.t1566

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/web/proxy_generic/proxy_webdav_external_execution.yml

Sources and licences

  • SigmaHQ

    "Suspicious External WebDAV Execution" by Ahmed Farouk (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/web/proxy_generic/proxy_webdav_external_execution.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: Suspicious External WebDAV Execution",
entity page, dataset version ref-35d940b58c1e, updated 2024-05-10T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/1ae64f96-72b6-48b3-ad3d-e71dff6c6398 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 1ae64f96-72b6-48b3-ad3d-e71dff6c6398, 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.