mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
70 lines
2.4 KiB
YAML
70 lines
2.4 KiB
YAML
name: Suspicious mshta spawn
|
|
id: 4d33a488-5b5f-11eb-ae93-0242ac130002
|
|
version: 1
|
|
date: '2021-01-20'
|
|
author: Michael Haag, Splunk
|
|
type: TTP
|
|
datamodel:
|
|
- Endpoint
|
|
description: The following analytic identifies wmiprvse.exe spawning mshta.exe. This
|
|
behavior is indicative of a DCOM object being utilized to spawn mshta from wmiprvse.exe
|
|
or svchost.exe. In this instance, adversaries may use LethalHTA that will spawn
|
|
mshta.exe from svchost.exe.
|
|
search: '| tstats `security_content_summariesonly` count values(Processes.process_name)
|
|
as process_name values(Processes.process) as process min(_time) as firstTime max(_time)
|
|
as lastTime from datamodel=Endpoint.Processes where (Processes.parent_process_name=svchost.exe
|
|
OR Processes.parent_process_name=wmiprvse.exe) AND Processes.process_name=mshta.exe
|
|
by Processes.dest Processes.parent_process Processes.user | `drop_dm_object_name(Processes)`
|
|
| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `suspicious_mshta_spawn_filter`'
|
|
how_to_implement: To successfully implement this search you need to be ingesting information
|
|
on process that include the name of the process responsible for the changes from
|
|
your endpoints into the `Endpoint` datamodel in the `Processes` node.
|
|
known_false_positives: Although unlikely, some legitimate applications may exhibit
|
|
this behavior, triggering a false positive.
|
|
references:
|
|
- https://codewhitesec.blogspot.com/2018/07/lethalhta.html
|
|
- https://github.com/redcanaryco/AtomicTestHarnesses
|
|
- https://redcanary.com/blog/introducing-atomictestharnesses/
|
|
tags:
|
|
analytic_story:
|
|
- Suspicious MSHTA Activity
|
|
asset_type: Endpoint
|
|
automated_detection_testing: passed
|
|
cis20:
|
|
- CIS 8
|
|
confidence: 60
|
|
context:
|
|
- Source:Endpoint
|
|
- Stage:Execution
|
|
- Stage:Defense Evasion
|
|
dataset:
|
|
- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1218.005/atomic_red_team/windows-sysmon.log
|
|
impact: 70
|
|
kill_chain_phases:
|
|
- Exploitation
|
|
message: mshta.exe spawned by wmiprvse.exe on $dest$
|
|
mitre_attack_id:
|
|
- T1218.005
|
|
nist:
|
|
- PR.PT
|
|
- DE.CM
|
|
observable:
|
|
- name: dest
|
|
type: Endpoint
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- Processes.process_name
|
|
- Processes.process
|
|
- Processes.parent_process_name
|
|
- Processes.dest
|
|
- Processes.parent_process
|
|
- Processes.user
|
|
risk_score: 42
|
|
security_domain: endpoint
|