mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
65 lines
2.2 KiB
YAML
65 lines
2.2 KiB
YAML
name: Change Default File Association
|
|
id: 462d17d8-1f71-11ec-ad07-acde48001122
|
|
version: 1
|
|
date: '2021-09-27'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: This analytic is developed to detect suspicious registry modification
|
|
to change the default file association of windows to malicious payload. This technique
|
|
was seen in some APT where it modify the default process to run file association,
|
|
like .txt to notepad.exe. Instead notepad.exe it will point to a Script or other
|
|
payload that will load malicious commands to the compromised host.
|
|
data_source:
|
|
- Sysmon Event ID 13
|
|
search:
|
|
selection1:
|
|
TargetObject: '*HKCR\\*'
|
|
selection2:
|
|
TargetObject: '*\\shell\\open\\command\\*'
|
|
condition: selection1 and selection2
|
|
how_to_implement: To successfully implement this search, you must be ingesting data
|
|
that records registry activity from your hosts to populate the endpoint data model
|
|
in the registry node. This is typically populated via endpoint detection-and-response
|
|
product, such as Carbon Black or endpoint data sources, such as Sysmon. The data
|
|
used for this search is typically generated via logs that report reads and writes
|
|
to the registry.
|
|
known_false_positives: unknown
|
|
references:
|
|
- https://dmcxblue.gitbook.io/red-team-notes-2-0/red-team-techniques/privilege-escalation/untitled-3/accessibility-features
|
|
tags:
|
|
analytic_story:
|
|
- Windows Persistence Techniques
|
|
- Windows Privilege Escalation
|
|
- Windows Registry Abuse
|
|
- Hermetic Wiper
|
|
- Prestige Ransomware
|
|
asset_type: Endpoint
|
|
confidence: 100
|
|
impact: 80
|
|
message: modified/added/deleted registry entry $Registry.registry_path$ in $dest$
|
|
mitre_attack_id:
|
|
- T1546.001
|
|
- T1546
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
- name: user
|
|
type: User
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 80
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1546.001/txtfile_reg/sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: xmlwineventlog
|