Sigma rule: Potentially Suspicious Execution From Tmp Folder

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-cbcaf54f6bfb, updated 2025-08-05T00:00:00.000Z.

Rule

Title
Potentially Suspicious Execution From Tmp Folder
Status
test
Level
medium
Author
Joseliyo Sanchez, @Joseliyo_Jstnk
Date
2023-06-02
Modified
2025-08-05
File
rules/linux/process_creation/proc_creation_lnx_susp_execution_tmp_folder.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a potentially suspicious execution of a process located in the '/tmp/' folder

Log source

product
linux
category
process_creation

Detection

selection:
    Image|startswith: '/tmp/'
filter_optional_nextcloud:
    Image|endswith: '/usr/bin/nextcloud'
condition: selection and not 1 of filter_optional_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1036

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/linux/process_creation/proc_creation_lnx_susp_execution_tmp_folder.yml

Sources and licences

  • SigmaHQ

    "Potentially Suspicious Execution From Tmp Folder" by Joseliyo Sanchez, @Joseliyo_Jstnk (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_susp_execution_tmp_folder.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: Potentially Suspicious Execution From Tmp Folder",
entity page, dataset version ref-cbcaf54f6bfb, updated 2025-08-05T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/312b42b1-bded-4441-8b58-163a3af58775 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 312b42b1-bded-4441-8b58-163a3af58775, 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.