Query: write Sigma for Detects the usage of utilities such as 'systemctl', 'service'...etc to stop or disable tools and services on Linux syste
Matching passage: Sigma rule: Detects the usage of utilities such as 'systemctl', 'service'...etc to stop or disable tools and services on Linux syste. Logsource: linux / process_creation. Rule: title: Disable Or Stop Services id: de25eeb8-3655-4643-ac3a-b662d3f26b6b status: test description: 'Detects the usage of utilities such as ''systemctl'', ''service''...etc to stop or disable tools and services on Linux systems. Attackers may stop or disable security tools and services to evade detection, maintain persistence, or disrupt system operations. ' references: - https://www.trendmicro.com/pl_pl/research/20/i/the-evolution-of-malicious-shell-scripts.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-09-15 modified: 2025-03-18 tags: - attack.defense-impairment - attack.t1685 - attack.impact - attack.t1489 logsource: category: process_creation product: linux detection: selection: Image|endswith: - /service - /systemctl - /chkconfig CommandLine|contains: - ' stop ' - ' disable ' filter_main_legit_snapd: Image|endswith: /systemctl CommandLine|contains: - --no-reload disable snap-snapd- - ' stop snap-snapd-' filter_main_ssh_preinstall: Image|endswith: /systemctl ParentCommandLine|contains: tmp.ci/preinst upgrade CommandLine|contains|all: - ' stop ' - ssh. filter_main_ubuntu_upgrade: ParentCommandLine|contains: /dpkg/info/ubuntu-pro-client.prerm upgrade Image|endswith: /systemctl filter_optional_aws_agent: Image|endswith: /systemctl CommandLine|endswith: snap.amazon-ssm-agent.amazon-ssm-agent.service condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate administration activities - Some false positives are to be expected. Apply additional filters as needed before pushing to production. level: medium
Near-miss passage: Sigma rule: Detects the creation of a startup item plist file, that automatically get executed at boot initialization to establish p. Logsource: macos / file_event. Rule: title: Startup Item File Created - MacOS id: dfe8b941-4e54-4242-b674-6b613d521962 status: test description: 'Detects the creation of a startup item plist file, that automatically get executed at boot initialization to establish persistence. Adversaries may use startup items automatically executed at boot initialization to establish persistence. Startup items execute during the final phase of the boot process and contain shell scripts or other executable files along with configuration information used by the system to determine the execution order for all startup items. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1037.005/T1037.005.md - https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/StartupItems.html author: Alejandro Ortuno, oscd.community date: 2020-10-14 modified: 2024-08-11 tags: - attack.persistence - attack.privilege-escalation - attack.t1037.005 logsource: category: file_event product: macos detection: selection: TargetFilename|startswith: - /Library/StartupItems/ - /System/Library/StartupItems TargetFilename|endswith: .plist condition: selection falsepositives: - Legitimate administration activities level: low