mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
62 lines
2.1 KiB
YAML
62 lines
2.1 KiB
YAML
name: Linux Deletion Of Services
|
|
id: b509bbd3-0331-4aaa-8e4a-d2affe100af6
|
|
version: 1
|
|
date: '2022-04-12'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: This analytic is to detect a deletion of services in a linux machine.
|
|
attacker may delete or modify services to impair some security features or act as
|
|
defense evasion in a compromised linux machine. This TTP can be also a good indicator
|
|
of a malware trying to wipe or delete several files in a compromised host as part
|
|
of its destructive payload like what acidrain malware does in linux or router machines.
|
|
This detection can be a good pivot to check what process and user tries to delete
|
|
this type of files which is not so common and need further investigation.
|
|
data_source:
|
|
- Sysmon Event ID 11
|
|
search:
|
|
selection1:
|
|
TargetFilename:
|
|
- /etc/systemd/*
|
|
- /usr/lib/systemd/*
|
|
Filesystem.action: deleted
|
|
selection2:
|
|
TargetFilename: '*.service'
|
|
condition: selection1 and selection2
|
|
how_to_implement: To successfully implement this search, you need to be ingesting
|
|
logs with the process name, parent process, and command-line executions from your
|
|
endpoints. If you are using Sysmon, you can use the Add-on for Linux Sysmon from
|
|
Splunkbase.
|
|
known_false_positives: Administrator or network operator can execute this command.
|
|
Please update the filter macros to remove false positives.
|
|
references:
|
|
- https://www.sentinelone.com/labs/acidrain-a-modem-wiper-rains-down-on-europe/
|
|
tags:
|
|
analytic_story:
|
|
- AcidRain
|
|
asset_type: endpoint
|
|
confidence: 80
|
|
impact: 80
|
|
message: a $process_name$ deleting a services in $dest$
|
|
mitre_attack_id:
|
|
- T1485
|
|
- T1070.004
|
|
- T1070
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 64
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/acidrain/sysmon_linux.log
|
|
source: Syslog:Linux-Sysmon/Operational
|
|
sourcetype: sysmon:linux
|