sigma-rules

collection_exchange_excessive_mail_items_accessed.toml

[Rule Tuning] Update Azure / M365 Rule Names and File Paths (#5172 )

2025-12-10 12:59:50 -05:00

collection_exchange_mailbox_access_by_unusual_client_app_id.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

collection_exchange_new_inbox_rule.toml

[Rule Tuning] M365 Exchange Inbox Forwarding Rule Created (#5852 )

2026-03-23 10:25:58 -04:00

collection_onedrive_excessive_file_downloads.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

collection_sharepoint_file_download_via_powershell.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

credential_access_entra_id_device_reg_via_oauth_redirection.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

credential_access_entra_id_potential_user_account_brute_force.toml

[Rule Tuning] Update Azure / M365 Rule Names and File Paths (#5172 )

2025-12-10 12:59:50 -05:00

credential_access_identity_user_account_lockouts.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_entra_id_susp_oauth2_authorization.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_anti_phish_policy_deletion.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_anti_phish_rule_modification.toml

[Rule Tuning] Update Azure / M365 Rule Names and File Paths (#5172 )

2025-12-10 12:59:50 -05:00

defense_evasion_exchange_dkim_signing_config_disabled.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_dlp_policy_removed.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_exchange_safelinks_disabled.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_mailbox_audit_bypass_association.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_malware_filter_policy_deletion.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_malware_filter_rule_mod.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_new_inbox_rule_delete_or_move.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_exchange_safe_attach_rule_disabled.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_mfa_notification_email_deleted.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_sharepoint_sharing_policy_weakened.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_teams_custom_app_interaction_allowed.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

defense_evasion_teams_external_access_enabled.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

discovery_sharepoint_sensitive_term_search.toml

[New Rule] Microsoft 365 SharePoint/OneDrive Sensitive Search and File Access (#5777 )

2026-02-26 14:29:14 -05:00

exfiltration_exchange_transport_rule_creation.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

exfiltration_exchange_transport_rule_modification.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

impact_security_compliance_potential_ransomware_activity.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

impact_security_compliance_unusual_volume_of_file_deletion.toml

[Rule Deprecation] Deprecate Individual MSFT Compliance Rules (#5679 )

2026-02-20 14:00:34 -05:00

initial_access_entra_id_portal_login_atypical_travel.toml

[Rule Tuning] M365 Identity Login from Atypical Travel Location - Reduce FP Noise (#5866 )

2026-03-26 16:03:38 -04:00

initial_access_entra_id_portal_login_impossible_travel.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

initial_access_identity_illicit_consent_grant_via_registered_application.toml

[Rule Tuning] M365 Identity OAuth Illicit Consent Grant by Rare Client and User (#5917 )

2026-04-06 09:30:07 -04:00

initial_access_identity_oauth_phishing_via_first_party_microsoft_application.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

initial_access_identity_unusual_sso_errors_for_user.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

initial_access_security_compliance_user_reported_phish_malware.toml

[Rule Deprecation] Deprecate Individual MSFT Compliance Rules (#5679 )

2026-02-20 14:00:34 -05:00

initial_access_security_compliance_user_restricted_from_sending_email.toml

[Rule Deprecation] Deprecate Individual MSFT Compliance Rules (#5679 )

2026-02-20 14:00:34 -05:00

lateral_movement_onedrive_malware_uploaded.toml

[FR] Minor Typo Fixes (#5784 )

2026-03-06 16:12:45 -06:00

lateral_movement_sharepoint_malware_uploaded.toml

[FR] Minor Typo Fixes (#5784 )

2026-03-06 16:12:45 -06:00

persistence_entra_id_global_administrator_role_assign.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

persistence_exchange_management_role_assignment.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

persistence_exchange_suspicious_mailbox_permission_delegation.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

persistence_teams_guest_access_enabled.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

privilege_escalation_exchange_new_or_modified_federation_domain.toml

[Rule Tuning] Add Supplemental Mitre Mappings (#5876 )

2026-04-01 09:12:42 -05:00

privilege_escalation_sharepoint_site_collection_admin_added.toml

[New Rule] M365 SharePoint Site Administrator Added (#5806 )

2026-03-17 10:49:24 -04:00