mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
tccontre
78 lines
2.8 KiB
YAML
78 lines
2.8 KiB
YAML
name: Windows Modify Registry Default Icon Setting
|
|
id: a7a7afdb-3c58-45b6-9bff-63e5acfd9d40
|
|
version: 1
|
|
date: '2023-01-16'
|
|
author: Teoderick Contreras, Splunk
|
|
type: Anomaly
|
|
datamodel:
|
|
- Endpoint
|
|
description: This analytic is developed to detect suspicious registry modification
|
|
to change the default icon association of windows to ransomware . This technique
|
|
was seen in Lockbit ransomware where it modified the default icon association of
|
|
the compromised Windows OS host with its dropped ransomware icon file as part of
|
|
its defacement payload. This registry is not commonly modified by a normal user
|
|
so having this anomaly detection may help to catch possible lockbit ransomware
|
|
infection or other malware.
|
|
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Registry
|
|
where Registry.registry_path ="*\\defaultIcon\\(Default)*" Registry.registry_path = "*HKCR\\*"
|
|
by Registry.registry_path Registry.registry_key_name Registry.registry_value_name Registry.action Registry.dest Registry.user
|
|
| `security_content_ctime(lastTime)`
|
|
| `security_content_ctime(firstTime)`
|
|
| `drop_dm_object_name(Registry)`
|
|
| `windows_modify_registry_default_icon_setting_filter`'
|
|
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://blogs.vmware.com/security/2022/10/lockbit-3-0-also-known-as-lockbit-black.html
|
|
- https://news.sophos.com/en-us/2020/04/24/lockbit-ransomware-borrows-tricks-to-keep-up-with-revil-and-maze/
|
|
tags:
|
|
analytic_story:
|
|
- LockBit Ransomware
|
|
asset_type: Endpoint
|
|
cis20:
|
|
- CIS 3
|
|
- CIS 5
|
|
- CIS 16
|
|
confidence: 80
|
|
context:
|
|
- Source:Endpoint
|
|
- Stage:Defense Evasion
|
|
dataset:
|
|
- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/lockbit_ransomware/sysmon.log
|
|
impact: 80
|
|
kill_chain_phases:
|
|
- Exploitation
|
|
message: a registry $Registry.registry_path$ was modified or created to modify defaulticon settings of the $dest$
|
|
mitre_attack_id:
|
|
- T1112
|
|
nist:
|
|
- DE.CM
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
- name: user
|
|
type: User
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- Registry.dest
|
|
- Registry.user
|
|
- Registry.registry_path
|
|
- Registry.registry_key_name
|
|
- Registry.registry_value_name
|
|
- Registry.action
|
|
risk_score: 64
|
|
security_domain: endpoint
|