Sigma rule: Whoami.EXE Execution With Output Option

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-cc099748231d, updated 2023-12-04T00:00:00.000Z.

Rule

Title
Whoami.EXE Execution With Output Option
Status
test
Level
medium
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Date
2023-02-28
Modified
2023-12-04
File
rules/windows/process_creation/proc_creation_win_whoami_output.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the execution of "whoami.exe" with the "/FO" flag to choose CSV as output format or with redirection options to export the results to a file for later use.

Log source

product
windows
category
process_creation

Detection

selection_main_img:
    - Image|endswith: '\whoami.exe'
    - OriginalFileName: 'whoami.exe'
selection_main_cli:
    CommandLine|contains:
        - ' /FO CSV'
        - ' -FO CSV'
selection_special:
    CommandLine|contains: 'whoami*>'
condition: all of selection_main_* or selection_special

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.discovery
  • attack.t1033
  • car.2016-03-001

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/windows/process_creation/proc_creation_win_whoami_output.yml

Sources and licences

  • SigmaHQ

    "Whoami.EXE Execution With Output Option" by Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_whoami_output.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: Whoami.EXE Execution With Output Option",
entity page, dataset version ref-cc099748231d, updated 2023-12-04T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/c30fb093-1109-4dc8-88a8-b30d11c95a5d (accessed 2026-11-03).
Underlying source: SigmaHQ rule c30fb093-1109-4dc8-88a8-b30d11c95a5d, 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.