mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
58 lines
2.1 KiB
YAML
58 lines
2.1 KiB
YAML
name: Auto Admin Logon Registry Entry
|
|
id: 1379d2b8-0f18-11ec-8ca3-acde48001122
|
|
version: 2
|
|
date: '2020-01-28'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: this search is to detect a suspicious registry modification to implement
|
|
auto admin logon to a host. This technique was seen in BlackMatter ransomware to
|
|
automatically logon to the compromise host after triggering a safemode boot to
|
|
continue encrypting the whole network. This behavior is not a common practice and
|
|
really a suspicious TTP or alert need to be consider if found within then network
|
|
premise.
|
|
data_source:
|
|
- Sysmon Event ID 13
|
|
search:
|
|
selection1:
|
|
Registry.registry_value_name: AutoAdminLogon
|
|
TargetObject: '*SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon*'
|
|
Details: '1'
|
|
condition: selection1
|
|
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 `Registry` node. Also make sure
|
|
that this registry was included in your config files ex. sysmon config to be monitored.
|
|
known_false_positives: unknown
|
|
references:
|
|
- https://news.sophos.com/en-us/2021/08/09/blackmatter-ransomware-emerges-from-the-shadow-of-darkside/
|
|
tags:
|
|
analytic_story:
|
|
- BlackMatter Ransomware
|
|
- Windows Registry Abuse
|
|
asset_type: Endpoint
|
|
confidence: 90
|
|
impact: 70
|
|
message: modified registry key $registry_key_name$ with registry value $registry_value_name$
|
|
to prepare autoadminlogon
|
|
mitre_attack_id:
|
|
- T1552.002
|
|
- T1552
|
|
observable:
|
|
- name: dest
|
|
type: Endpoint
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 63
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1552.002/autoadminlogon/windows-sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: xmlwineventlog
|