Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
24 lines
815 B
YAML
24 lines
815 B
YAML
title: Remove Scheduled Cron Task/Job
|
|
id: c2e234de-03a3-41e1-b39a-1e56dc17ba67
|
|
status: test
|
|
description: |
|
|
Detects usage of the 'crontab' utility to remove the current crontab.
|
|
This is a common occurrence where cryptocurrency miners compete against each other by removing traces of other miners to hijack the maximum amount of resources possible
|
|
references:
|
|
- https://www.trendmicro.com/en_us/research/22/i/how-malicious-actors-abuse-native-linux-tools-in-their-attacks.html
|
|
author: Nasreddine Bencherchali (Nextron Systems)
|
|
date: 2022-09-15
|
|
tags:
|
|
- attack.defense-evasion
|
|
logsource:
|
|
category: process_creation
|
|
product: linux
|
|
detection:
|
|
selection:
|
|
Image|endswith: 'crontab'
|
|
CommandLine|contains: ' -r'
|
|
condition: selection
|
|
falsepositives:
|
|
- Unknown
|
|
level: medium
|