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https://github.com/splunk/security_content
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pyth0n1c
82 lines
3.7 KiB
YAML
82 lines
3.7 KiB
YAML
name: Disabling Task Manager
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id: dac279bc-9202-11eb-b7fb-acde48001122
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version: 3
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date: '2022-11-14'
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author: Steven Dick, 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 search is to identifies modification of registry to disable the
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task manager of windows operating system. this event or technique are commonly seen
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in malware such as RAT, Trojan, TrojanSpy or worm to prevent the user to terminate
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their process.
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search: '| tstats `security_content_summariesonly` count min(_time) AS firstTime max(_time) AS lastTime FROM datamodel=Endpoint.Processes BY _time span=1h Processes.user Processes.process_id Processes.process_name Processes.process Processes.process_path Processes.dest Processes.parent_process_name Processes.parent_process Processes.process_guid
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| `drop_dm_object_name(Processes)`
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| join process_guid [
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| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Registry WHERE (Registry.registry_path= "*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\DisableTaskMgr" Registry.registry_value_data = "0x00000001") BY _time span=1h Registry.registry_path Registry.registry_key_name Registry.registry_value_name Registry.registry_value_data Registry.process_guid
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| `drop_dm_object_name(Registry)`]
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| fields firstTime lastTime dest user parent_process_name parent_process process_name process_path process registry_key_name registry_path registry_value_name registry_value_data process_guid
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| where isnotnull(registry_value_data)
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `disabling_task_manager_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the registry value name, registry path, and registry value data from your
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endpoints. If you are using Sysmon, you must have at least version 2.0 of the offical
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Sysmon TA. https://splunkbase.splunk.com/app/5709
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known_false_positives: admin may disable this application for non technical user.
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references:
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- https://any.run/report/ea4ea08407d4ee72e009103a3b77e5a09412b722fdef67315ea63f22011152af/a866d7b1-c236-4f26-a391-5ae32213dfc4#registry
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- https://blog.talosintelligence.com/2020/05/threat-roundup-0424-0501.html
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tags:
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analytic_story:
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- Windows Defense Evasion Tactics
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- Windows Registry Abuse
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confidence: 60
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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/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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impact: 70
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kill_chain_phases:
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- Exploitation
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message: The Windows Task Manager was disabled on $dest$ by $user$.
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mitre_attack_id:
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- T1562.001
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- T1562
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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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- Processes.user
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- Processes.dest
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- Processes.process_id
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- Processes.process_name
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- Processes.process
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- Processes.process_path
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.process_guid
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- Registry.dest
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- Registry.registry_value_name
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- Registry.registry_key_name
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- Registry.registry_path
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- Registry.registry_value_data
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- Registry.process_guid
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risk_score: 42
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security_domain: endpoint
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asset_type: Endpoint
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