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pyth0n1c
a6522d37b6
registry_value_name in a number of detections in response to sysmonTA updates (correcting a previous error).
68 lines
2.7 KiB
YAML
68 lines
2.7 KiB
YAML
name: Allow Operation with Consent Admin
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id: 7de17d7a-c9d8-11eb-a812-acde48001122
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version: 1
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date: '2021-06-10'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This analytic identifies a potential privilege escalation attempt to
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perform malicious task. This registry modification is designed to allow the `Consent
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Admin` to perform an operation that requires elevation without consent or credentials.
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We also found this in some attacker to gain privilege escalation to the compromise
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machine.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime FROM datamodel=Endpoint.Registry where Registry.registry_path= "*\\Microsoft\\Windows\\CurrentVersion\\Policies\\System*"
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Registry.registry_value_name = ConsentPromptBehaviorAdmin Registry.registry_value_data
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= "0x00000000" by Registry.registry_path Registry.registry_key_name Registry.registry_value_data
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Registry.dest | `drop_dm_object_name(Registry)` | `security_content_ctime(firstTime)`
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|`security_content_ctime(lastTime)` | `allow_operation_with_consent_admin_filter`'
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how_to_implement: To successfully implement this search, you must be ingesting data
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that records registry activity from your hosts to populate the endpoint data model
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in the registry node. This is typically populated via endpoint detection-and-response
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product, such as Carbon Black or endpoint data sources, such as Sysmon. The data
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used for this search is typically generated via logs that report reads and writes
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to the registry.
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known_false_positives: unknown
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references:
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- https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-gpsb/341747f5-6b5d-4d30-85fc-fa1cc04038d4
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- https://www.trendmicro.com/vinfo/no/threat-encyclopedia/malware/Ransom.Win32.MRDEC.MRA/
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tags:
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analytic_story:
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- Ransomware
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automated_detection_testing: passed
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confidence: 50
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context:
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- Source:Endpoint
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- Stage:Privilege Escalation
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/ransomware_ttp/data1/windows-sysmon.log
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impact: 50
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kill_chain_phases:
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- Exploitation
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message: Suspicious registry modification was performed on endpoint $dest$ by user
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$user$. This behavior is indicative of privilege escalation.
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mitre_attack_id:
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- T1548
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observable:
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- name: user
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type: User
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role:
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- Victim
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- name: dest
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type: Hostname
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role:
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- Victim
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Registry.registry_path
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- Registry.registry_key_name
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- Registry.registry_value_name
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- Registry.dest
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risk_score: 25
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security_domain: endpoint
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