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https://github.com/splunk/security_content
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tccontre
58 lines
3.0 KiB
YAML
58 lines
3.0 KiB
YAML
name: Disable Windows Behavior Monitoring
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id: 79439cae-9200-11eb-a4d3-acde48001122
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version: 1
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date: '2021-03-31'
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author: Teoderick Contreras, Splunk
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type: batch
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datamodel:
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- Endpoint
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description: This search is to identifies a modification in registry to disable the
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windows denfender real time behavior monitoring. This event or technique is commonly
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seen in RAT, bot, or Trojan to disable AV to evade detections.
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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
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Registry.registry_path= "*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableBehaviorMonitoring" OR
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Registry.registry_path= "*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableOnAccessProtection" OR
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Registry.registry_path= "*\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableScanOnRealtimeEnable" OR
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Registry.registry_path= "*\\SOFTWARE\\Microsoft\\Windows Defender\\Real-Time Protection\\DisableRealtimeMonitoring" OR
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Registry.registry_path= "*\\Real-Time Protection\\DisableIntrusionPreventionSystem" OR
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Registry.registry_path= "*\\Real-Time Protection\\DisableIOAVProtection" OR
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Registry.registry_path= "*\\Real-Time Protection\\DisableScriptScanning"
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Registry.registry_value_name = "DWORD (0x00000001)"
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by Registry.registry_path Registry.registry_key_name Registry.registry_value_name
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Registry.dest | `drop_dm_object_name(Registry)` | `security_content_ctime(firstTime)`
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|`security_content_ctime(lastTime)` | `disable_windows_behavior_monitoring_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Registry` node. Also make sure
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that this registry was included in your config files ex. sysmon config to be monitored.
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known_false_positives: admin or user may choose to disable this windows features.
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references:
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- https://tccontre.blogspot.com/2020/01/remcos-rat-evading-windows-defender-av.html
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tags:
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analytic_story:
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- Windows Defense Evasion Tactics
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- Ransomware
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- Revil Ransomware
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automated_detection_testing: passed
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-security.log
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log
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kill_chain_phases:
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- Exploitation
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mitre_attack_id:
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- T1562.001
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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_key_name
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- Registry.registry_path
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- Registry.user
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- Registry.dest
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- Registry.registry_value_name
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security_domain: endpoint
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