mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
87 lines
3.5 KiB
YAML
87 lines
3.5 KiB
YAML
name: Detect Certify Command Line Arguments
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id: e6d2dc61-a8b9-4b03-906c-da0ca75d71b8
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version: 2
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date: '2024-05-25'
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author: Steven Dick
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status: production
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type: TTP
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description: The following analytic detects the use of Certify or Certipy tools to
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enumerate Active Directory Certificate Services (AD CS) environments. It leverages
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Endpoint Detection and Response (EDR) data, focusing on specific command-line arguments
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associated with these tools. This activity is significant because it indicates potential
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reconnaissance or exploitation attempts targeting AD CS, which could lead to unauthorized
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access or privilege escalation. If confirmed malicious, attackers could gain insights
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into the AD CS infrastructure, potentially compromising sensitive certificates and
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escalating their privileges within the network.
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data_source:
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- Sysmon EventID 1
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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.Processes where Processes.process IN ("* find
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*","* auth *","* request *","* req *","* download *",) AND Processes.process IN
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("* /vulnerable*","* /enrolleeSuppliesSubject *","* /json /outfile*","* /ca*", "*
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-username *","* -u *") by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`|
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`detect_certify_command_line_arguments_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection
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and Response (EDR) agents. These agents are designed to provide security-related
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telemetry from the endpoints where the agent is installed. To implement this search,
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you must ingest logs that contain the process GUID, process name, and parent process.
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Additionally, you must ingest complete command-line executions. These logs must
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be processed using the appropriate Splunk Technology Add-ons that are specific to
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the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
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data model. Use the Splunk Common Information Model (CIM) to normalize the field
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names and speed up the data modeling process.
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known_false_positives: Unknown
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references:
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- https://github.com/GhostPack/Certify
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- https://github.com/ly4k/Certipy
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- https://specterops.io/wp-content/uploads/sites/3/2022/06/Certified_Pre-Owned.pdf
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tags:
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analytic_story:
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- Windows Certificate Services
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- Ingress Tool Transfer
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asset_type: Endpoint
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confidence: 90
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impact: 100
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message: Certify/Certipy arguments detected on $dest$.
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mitre_attack_id:
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- T1649
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- T1105
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observable:
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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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- name: process_name
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type: Process
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role:
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- Attacker
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- name: process_name
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type: Process Name
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role:
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- Attacker
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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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- Processes.dest
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- Processes.user
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- Processes.parent_process
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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risk_score: 90
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1649/certify_abuse/certify_esc1_abuse_sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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update_timestamp: true
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