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P4T12ICK
60 lines
2.0 KiB
YAML
60 lines
2.0 KiB
YAML
name: Unknown Process Using The Kerberos Protocol
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id: c91a0852-9fbb-11ec-af44-acde48001122
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version: 1
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date: '2022-03-09'
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author: Mauricio Velazco, Splunk
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status: production
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type: TTP
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description: The following analytic identifies a process performing an outbound connection
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on port 88 used by default by the network authentication protocol Kerberos. Typically,
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on a regular Windows endpoint, only the lsass.exe process is the one tasked with
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connecting to the Kerberos Distribution Center to obtain Kerberos tickets. Identifying
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an unknown process using this protocol may be evidence of an adversary abusing the
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Kerberos protocol.
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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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Image|endswith: lsass.exe
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condition: selection1
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how_to_implement: To successfully implement this search, you must be ingesting your
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endpoint events and populating the Endpoint and Network data models.
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known_false_positives: Custom applications may leverage the Kerberos protocol. Filter
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as needed.
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references:
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- https://stealthbits.com/blog/how-to-detect-overpass-the-hash-attacks/
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- https://www.thehacker.recipes/ad/movement/kerberos/ptk
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tags:
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analytic_story:
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- Active Directory Kerberos Attacks
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asset_type: Endpoint
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confidence: 60
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impact: 60
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message: ''
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mitre_attack_id:
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- T1550
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observable:
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- name: src_ip
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type: IP Address
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role:
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- Attacker
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- name: dest_ip
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type: IP Address
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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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risk_score: 36
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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: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1550/rubeus/windows-security.log
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source: WinEventLog:Security
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sourcetype: WinEventLog
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1550/rubeus/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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