mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
64 lines
2.4 KiB
YAML
64 lines
2.4 KiB
YAML
name: Disable Schedule Task
|
|
id: db596056-3019-11ec-a9ff-acde48001122
|
|
version: 1
|
|
date: '2021-10-18'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: This analytic is to detect a suspicious commandline to disable existing
|
|
schedule task. This technique is used by adversaries or commodity malware like IcedID
|
|
to disable security application (AV products) in the targetted host to evade detections.
|
|
This TTP is a good pivot to check further why and what other process run before
|
|
and after this detection. check which process execute the commandline and what task
|
|
is disabled. parent child process is quite valuable in this scenario too.
|
|
data_source:
|
|
- Sysmon Event ID 1
|
|
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime
|
|
max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=schtasks.exe
|
|
Processes.process=*/change* Processes.process=*/disable* by Processes.user Processes.process_name
|
|
Processes.process Processes.parent_process_name Processes.parent_process Processes.dest
|
|
| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
|
|
| `disable_schedule_task_filter`'
|
|
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 must have at least version 6.0.4 of the
|
|
Sysmon TA.
|
|
known_false_positives: admin may disable problematic schedule task
|
|
references:
|
|
- https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
|
|
tags:
|
|
analytic_story:
|
|
- IcedID
|
|
- Living Off The Land
|
|
asset_type: Endpoint
|
|
confidence: 80
|
|
impact: 70
|
|
message: schtask process with commandline $process$ to disable schedule task in
|
|
$dest$
|
|
mitre_attack_id:
|
|
- T1562.001
|
|
- T1562
|
|
observable:
|
|
- name: dest
|
|
type: Endpoint
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- Processes.user
|
|
- Processes.process_name
|
|
- Processes.parent_process_name
|
|
- Processes.dest
|
|
risk_score: 56
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/disable_schtask/sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: xmlwineventlog
|