Sigma rule: Disabling Security Tools

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-3bf939e5aa8e, updated 2022-10-09T00:00:00.000Z.

Rule

Title: Disabling Security Tools
Status: test
Level: medium
Author: Ömer Günal, Alejandro Ortuno, oscd.community
Date: 2020-06-17
Modified: 2022-10-09
File: rules/linux/process_creation/proc_creation_lnx_security_tools_disabling.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects disabling security tools

Log source

product: linux
category: process_creation

Detection

selection_iptables_1:
    Image|endswith: '/service'
    CommandLine|contains|all:
        - 'iptables'
        - 'stop'
selection_iptables_2:
    Image|endswith: '/service'
    CommandLine|contains|all:
        - 'ip6tables'
        - 'stop'
selection_iptables_3:
    Image|endswith: '/chkconfig'
    CommandLine|contains|all:
        - 'iptables'
        - 'stop'
selection_iptables_4:
    Image|endswith: '/chkconfig'
    CommandLine|contains|all:
        - 'ip6tables'
        - 'stop'
selection_firewall_1:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'firewalld'
        - 'stop'
selection_firewall_2:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'firewalld'
        - 'disable'
selection_carbonblack_1:
    Image|endswith: '/service'
    CommandLine|contains|all:
        - 'cbdaemon'
        - 'stop'
selection_carbonblack_2:
    Image|endswith: '/chkconfig'
    CommandLine|contains|all:
        - 'cbdaemon'
        - 'off'
selection_carbonblack_3:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'cbdaemon'
        - 'stop'
selection_carbonblack_4:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'cbdaemon'
        - 'disable'
selection_selinux:
    Image|endswith: '/setenforce'
    CommandLine|contains: '0'
selection_crowdstrike_1:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'stop'
        - 'falcon-sensor'
selection_crowdstrike_2:
    Image|endswith: '/systemctl'
    CommandLine|contains|all:
        - 'disable'
        - 'falcon-sensor'
condition: 1 of selection*

False positives (as the rule lists them)

Legitimate administration activities

MITRE ATT&CK ids this rule names

T1686

References

https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.004/T1562.004.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_security_tools_disabling.yml

Sources and licences

SigmaHQ
"Disabling Security Tools" by Ömer Günal, Alejandro Ortuno, oscd.community (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/process_creation/proc_creation_lnx_security_tools_disabling.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: Disabling Security Tools",
entity page, dataset version ref-3bf939e5aa8e, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/e3a8a052-111f-4606-9aee-f28ebeb76776 (accessed 2026-11-03).
Underlying source: SigmaHQ rule e3a8a052-111f-4606-9aee-f28ebeb76776, 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.