mirror of
https://github.com/splunk/security_content
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Bhavin Patel
77 lines
3.0 KiB
YAML
77 lines
3.0 KiB
YAML
name: Linux Service Restarted
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id: 084275ba-61b8-11ec-8d64-acde48001122
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version: 1
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date: '2021-12-20'
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author: Teoderick Contreras, Splunk
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type: Anomaly
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datamodel:
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- Endpoint
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description: This analytic looks for restarted or re-enable services in linux platform.
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This technique can be executed or performed using systemctl or service tool application.
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Adversaries may create or modify Windows services to repeatedly execute malicious
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payloads as part of persistence. When Windows boots up, it starts programs or applications
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called services that perform background system functions. Administrator may also
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create a legitimated service for a specific tool or normal application as part of
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task or automation, in this scenario it is suggested to look for the service path
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of the actual script or executable that register as service and who created the
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service for further verification.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where (Processes.process_name IN ("systemctl",
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"service") OR Processes.process IN ("*systemctl *", "*service *")) Processes.process
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IN ("*restart*", "*reload*", "*reenable*") by Processes.dest Processes.user Processes.parent_process_name
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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Processes.process_guid | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `linux_service_restarted_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and commandline executions from your
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endpoints. If you are using Sysmon, you can use the Add-on for Linux Sysmon from Splunkbase.
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known_false_positives: Administrator or network operator can use this commandline
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for automation purposes. Please update the filter macros to remove false positives.
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references:
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- https://attack.mitre.org/techniques/T1543/003/
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tags:
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analytic_story:
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- Linux Privilege Escalation
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- Linux Persistence Techniques
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1053.006/service_systemd/sysmon_linux.log
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kill_chain_phases:
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- Privilege Escalation
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mitre_attack_id:
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- T1053.006
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- T1053
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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security_domain: endpoint
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impact: 50
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confidence: 50
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risk_score: 25
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context:
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- Source:Endpoint
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- Stage:Privilege Escalation
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- Stage:Persistence
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message: A commandline $process$ that may create or start a service on $dest$
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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nist:
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- DE.CM
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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automated_detection_testing: passed
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