Hacktool - Defendnot Execution #5469
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nasbench
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Jun 5, 2025
rules/windows/process_creation/proc_creation_win_hktl_defendnot_execution.yml
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rules/windows/registry/registry_set/registry_set_security_center_av_registry_modification.yml
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Co-authored-by: Nasreddine Bencherchali <nasreddineb@splunk.com>
phantinuss
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Jun 11, 2025
rules/windows/builtin/security/win_security_hktl_defendnot_default_scheduled_task_activity.yml
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rules/windows/builtin/security/win_security_hktl_defendnot_default_scheduled_task_activity.yml
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rules/windows/powershell/powershell_script/posh_ps_hktl_defendnot_installation.yml
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rules/windows/process_creation/proc_creation_win_hktl_defendnot_execution.yml
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Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
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Summary of the Pull Request
Added rules to detect execution of defendnot, a tool that mimics as a third-part av and tricks Windows Defender into disabling it.
Changelog
new: Hacktool - Defendnot Default Scheduled Task Activity
new: Hacktool - DefendNot Installation via PowerShell One-Liner
new: Hacktool - Defendnot Execution
new: Microsoft Security Center AV Registry Modification
Example Log Event
Fixed Issues
SigmaHQ Rule Creation Conventions