Sigma rule: Scheduled Task/Job At

Rule

Title

Scheduled Task/Job At

Status

stable

Level

low

Author

Ömer Günal, oscd.community

Date

2020-10-06

Modified

2022-07-07

File

rules/linux/process_creation/proc_creation_lnx_at_command.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the use of at/atd which are utilities that are used to schedule tasks.
They are often abused by adversaries to maintain persistence or to perform task scheduling for initial or recurring execution of malicious code

Log source

product

linux

category

process_creation

Detection

selection:
    Image|endswith:
        - '/at'
        - '/atd'
condition: selection

False positives (as the rule lists them)

• Legitimate administration activities

Tags

• attack.privilege-escalation
• attack.execution
• attack.persistence
• attack.t1053.002

MITRE ATT&CK ids this rule names

• T1053.002

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.002/T1053.002.md

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_at_command.yml