mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Eric
83 lines
4.3 KiB
YAML
83 lines
4.3 KiB
YAML
name: Linux Stop Services
|
|
id: d05204a5-9f1c-4946-a7f3-4fa58d76d5fd
|
|
version: 6
|
|
date: '2025-05-02'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: The following analytic detects attempts to stop or clear a service on
|
|
Linux systems. It leverages data from Endpoint Detection and Response (EDR) agents,
|
|
focusing on processes like "systemctl," "service," and "svcadm" executing stop commands.
|
|
This activity is significant as adversaries often terminate security or critical
|
|
services to disable defenses or disrupt operations, as seen in malware like Industroyer2.
|
|
If confirmed malicious, this could lead to the disabling of security mechanisms,
|
|
allowing attackers to persist, escalate privileges, or deploy destructive payloads,
|
|
severely impacting system integrity and availability.
|
|
data_source:
|
|
- Sysmon for Linux EventID 1
|
|
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
|
|
as lastTime from datamodel=Endpoint.Processes where Processes.process_name IN ("systemctl",
|
|
"service", "svcadm") Processes.process ="*stop*" by Processes.action Processes.dest
|
|
Processes.original_file_name Processes.parent_process Processes.parent_process_exec
|
|
Processes.parent_process_guid Processes.parent_process_id Processes.parent_process_name
|
|
Processes.parent_process_path Processes.process Processes.process_exec Processes.process_guid
|
|
Processes.process_hash Processes.process_id Processes.process_integrity_level Processes.process_name
|
|
Processes.process_path Processes.user Processes.user_id Processes.vendor_product
|
|
| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
|
|
| `linux_stop_services_filter`'
|
|
how_to_implement: The detection is based on data that originates from Endpoint Detection
|
|
and Response (EDR) agents. These agents are designed to provide security-related
|
|
telemetry from the endpoints where the agent is installed. To implement this search,
|
|
you must ingest logs that contain the process GUID, process name, and parent process.
|
|
Additionally, you must ingest complete command-line executions. These logs must
|
|
be processed using the appropriate Splunk Technology Add-ons that are specific to
|
|
the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
|
|
data model. Use the Splunk Common Information Model (CIM) to normalize the field
|
|
names and speed up the data modeling process.
|
|
known_false_positives: Administrator or network operator can use this application
|
|
for automation purposes. Please update the filter macros to remove false positives.
|
|
references:
|
|
- https://www.welivesecurity.com/2022/04/12/industroyer2-industroyer-reloaded/
|
|
- https://cert.gov.ua/article/39518
|
|
drilldown_searches:
|
|
- name: View the detection results for - "$dest$"
|
|
search: '%original_detection_search% | search dest = "$dest$"'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
- name: View risk events for the last 7 days for - "$dest$"
|
|
search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
|
|
starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
|
|
values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
|
|
as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
|
|
as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
|
|
| `security_content_ctime(lastTime)`'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
rba:
|
|
message: An instance of $parent_process_name$ spawning $process_name$ was identified
|
|
attempting to stop services on endpoint $dest$ by $user$.
|
|
risk_objects:
|
|
- field: dest
|
|
type: system
|
|
score: 49
|
|
threat_objects: []
|
|
tags:
|
|
analytic_story:
|
|
- AwfulShred
|
|
- Data Destruction
|
|
- Industroyer2
|
|
asset_type: Endpoint
|
|
mitre_attack_id:
|
|
- T1489
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1489/linux_service_stop_disable/sysmon_linux.log
|
|
source: Syslog:Linux-Sysmon/Operational
|
|
sourcetype: sysmon:linux
|