Austin Songer
ef7548f04c
* Update collection_email_powershell_exchange_mailbox.toml * Update command_and_control_remote_file_copy_powershell.toml * Update defense_evasion_disabling_windows_defender_powershell.toml * Update execution_scheduled_task_powershell_source.toml * Update execution_via_compiled_html_file.toml * Update impact_volume_shadow_copy_deletion_via_powershell.toml * Update initial_access_suspicious_ms_exchange_worker_child_process.toml * Update persistence_powershell_exch_mailbox_activesync_add_device.toml * Update persistence_webshell_detection.toml * Update defense_evasion_execution_msbuild_started_by_script.toml * Update defense_evasion_clearing_windows_event_logs.toml * Update defense_evasion_suspicious_zoom_child_process.toml * Update defense_evasion_defender_exclusion_via_powershell.toml * Update persistence_local_scheduled_task_scripting.toml * Update persistence_local_scheduled_task_creation.toml * Update persistence_system_shells_via_services.toml * Update collection_email_powershell_exchange_mailbox.toml * Update command_and_control_remote_file_copy_powershell.toml * Update defense_evasion_clearing_windows_event_logs.toml * Update defense_evasion_defender_exclusion_via_powershell.toml * Update defense_evasion_disabling_windows_defender_powershell.toml * Update defense_evasion_execution_msbuild_started_by_script.toml * Update defense_evasion_suspicious_zoom_child_process.toml * Update execution_scheduled_task_powershell_source.toml * Update execution_via_compiled_html_file.toml * Update impact_volume_shadow_copy_deletion_via_powershell.toml * Update initial_access_suspicious_ms_exchange_worker_child_process.toml * Update persistence_local_scheduled_task_creation.toml * Update persistence_local_scheduled_task_scripting.toml * Update persistence_powershell_exch_mailbox_activesync_add_device.toml * Update persistence_system_shells_via_services.toml * Update persistence_webshell_detection.toml * Update rules/windows/persistence_local_scheduled_task_creation.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/initial_access_suspicious_ms_exchange_worker_child_process.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/defense_evasion_disabling_windows_defender_powershell.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/windows/defense_evasion_defender_exclusion_via_powershell.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
49 lines
1.6 KiB
TOML
49 lines
1.6 KiB
TOML
[metadata]
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creation_date = "2021/07/07"
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maturity = "production"
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updated_date = "2021/10/17"
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[rule]
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author = ["Elastic"]
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description = "Identifies use of the Set-MpPreference PowerShell command to disable or weaken certain Windows Defender settings."
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false_positives = ["Planned Windows Defender configuration changes."]
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Disabling Windows Defender Security Settings via PowerShell"
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references = [
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"https://docs.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=windowsserver2019-ps",
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]
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risk_score = 47
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rule_id = "c8cccb06-faf2-4cd5-886e-2c9636cfcb87"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where event.type == "start" and
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(process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") or process.pe.original_file_name in ("powershell.exe", "pwsh.dll", "powershell_ise.exe")) and
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process.args : "Set-MpPreference" and process.args : ("-Disable*", "Disabled", "NeverSend", "-Exclusion*")
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1562"
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reference = "https://attack.mitre.org/techniques/T1562/"
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name = "Impair Defenses"
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[[rule.threat.technique.subtechnique]]
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id = "T1562.001"
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reference = "https://attack.mitre.org/techniques/T1562/001/"
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name = "Disable or Modify Tools"
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[rule.threat.tactic]
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id = "TA0005"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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name = "Defense Evasion"
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