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71 lines
2.6 KiB
YAML
71 lines
2.6 KiB
YAML
name: Windows Event Log Cleared
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id: ad517544-aff9-4c96-bd99-d6eb43bfbb6a
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version: 6
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date: '2020-07-06'
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author: Rico Valdez, Michael Haag, Splunk
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type: batch
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datamodel: []
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description: The following analytic utilizes Windows Security Event ID 1102 or System
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log event 104 to identify when a Windows event log is cleared. Note that this analytic
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will require tuning or restricted to specific endpoints based on criticality. During
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triage, based on time of day and user, determine if this was planned. If not planned,
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follow through with reviewing parallel alerts and other data sources to determine
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what else may have occurred.
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search: (`wineventlog_security` EventCode=1102) OR (`wineventlog_system` EventCode=104)
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| stats count min(_time) as firstTime max(_time) as lastTime by dest Message EventCode
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_event_log_cleared_filter`
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how_to_implement: To successfully implement this search, you need to be ingesting
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Windows event logs from your hosts. In addition, the Splunk Windows TA is needed.
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known_false_positives: It is possible that these logs may be legitimately cleared
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by Administrators. Filter as needed.
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references:
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- https://docs.microsoft.com/en-us/windows/security/threat-protection/auditing/event-1102
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- https://www.ired.team/offensive-security/defense-evasion/disabling-windows-event-logs-by-suspending-eventlog-service-threads
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- https://attack.mitre.org/techniques/T1070/001/
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.001/T1070.001.md
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tags:
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analytic_story:
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- Windows Log Manipulation
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- Ransomware
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- Clop Ransomware
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asset_type: Endpoint
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automated_detection_testing: passed
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cis20:
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- CIS 3
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- CIS 5
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- CIS 6
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confidence: 100
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1070.001/atomic_red_team/windows-security.log
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1070.001/atomic_red_team/windows-system.log
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impact: 70
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kill_chain_phases:
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- Actions on Objectives
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message: Windows event logs cleared on $dest$ via EventCode $EventCode$
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mitre_attack_id:
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- T1070.001
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nist:
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- DE.DP
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- PR.IP
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- PR.AC
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- PR.AT
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- DE.AE
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observable:
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- name: dest
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type: Endpoint
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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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- EventCode
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- dest
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risk_score: 70
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security_domain: endpoint
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