mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Patrick Bareiss
38 lines
1.6 KiB
YAML
38 lines
1.6 KiB
YAML
name: Unusually Long Command Line
|
||
id: c77162d3-f93c-45cc-80c8-22f6a4264e7f
|
||
version: 4
|
||
date: '2020-03-16'
|
||
description: Command lines that are extremely long may be indicative of malicious
|
||
activity on your hosts.
|
||
how_to_implement: You must be ingesting endpoint data that tracks process activity,
|
||
including parent-child relationships, from your endpoints to populate the Endpoint
|
||
data model in the Processes node. The command-line arguments are mapped to the "process"
|
||
field in the Endpoint data model.
|
||
type: ESCU
|
||
references: []
|
||
author: David Dorsey, Splunk
|
||
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
|
||
as lastTime FROM datamodel=Endpoint.Processes by Processes.user Processes.dest Processes.process_name
|
||
Processes.process | `drop_dm_object_name("Processes")` | `security_content_ctime(firstTime)`|
|
||
`security_content_ctime(lastTime)`| eval processlen=len(process) | eventstats stdev(processlen)
|
||
as stdev, avg(processlen) as avg by dest | stats max(processlen) as maxlen, values(stdev)
|
||
as stdevperhost, values(avg) as avgperhost by dest, user, process_name, process |
|
||
`unusually_long_command_line_filter` | eval threshold = 10 | where maxlen > ((threshold*stdevperhost)
|
||
+ avgperhost)'
|
||
known_false_positives: Some legitimate applications start with long command lines.
|
||
tags:
|
||
analytics_story:
|
||
- Suspicious Command-Line Executions
|
||
- Unusual Processes
|
||
- Possible Backdoor Activity Associated With MUDCARP Espionage Campaigns
|
||
- Ransomware
|
||
kill_chain_phases:
|
||
- Actions on Objectives
|
||
cis20:
|
||
- CIS 8
|
||
nist:
|
||
- PR.PT
|
||
- DE.CM
|
||
security_domain: endpoint
|
||
asset_type: ''
|