Sigma rule: Suspicious Splwow64 Without Params

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-2e14a73aba23, updated 2022-12-25T00:00:00.000Z.

Rule

Title
Suspicious Splwow64 Without Params
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2021-08-23
Modified
2022-12-25
File
rules/windows/process_creation/proc_creation_win_splwow64_cli_anomaly.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects suspicious Splwow64.exe process without any command line parameters

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\splwow64.exe'
    CommandLine|endswith: 'splwow64.exe'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1202

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/windows/process_creation/proc_creation_win_splwow64_cli_anomaly.yml

Sources and licences

  • SigmaHQ

    "Suspicious Splwow64 Without Params" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_splwow64_cli_anomaly.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 Splwow64 Without Params",
entity page, dataset version ref-2e14a73aba23, updated 2022-12-25T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/1f1a8509-2cbb-44f5-8751-8e1571518ce2 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 1f1a8509-2cbb-44f5-8751-8e1571518ce2, 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.