Scheduled Cron Task/Job - Linux

Detects abuse of the cron utility to perform task scheduling for initial or recurring execution of malicious code. Detection will focus on crontab jobs uploaded from the tmp folder.

title: Scheduled Cron Task/Job - Linux
id: 6b14bac8-3e3a-4324-8109-42f0546a347f
status: test
description: Detects abuse of the cron utility to perform task scheduling for initial or recurring execution of malicious code. Detection will focus on crontab jobs uploaded from the tmp folder.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.003/T1053.003.md
author: Alejandro Ortuno, oscd.community
date: 2020-10-06
modified: 2022-11-27
tags:
    - attack.execution
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1053.003
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: 'crontab'
        CommandLine|contains: '/tmp/'
    condition: selection
falsepositives:
    - Legitimate administration activities
level: medium

• T1053.003Cron

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.003/T1053.003.md↗