[New] Endpoint Rule Conversion PR#5658
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DefSecSentinel merged 34 commits intomainfrom Feb 6, 2026
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Rule: New - GuidelinesThese guidelines serve as a reminder set of considerations when proposing a new rule. Documentation and Context
Rule Metadata Checks
New BBR Rules
Testing and Validation
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- Added timestamp_override = 'event.ingested' to 15 non-sequence EQL rules - Added '## Triage and analysis' investigation guides to 19 high-severity rules - Fixed T1176 technique name from 'Browser Extensions' to 'Software Extensions'
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Enhanced investigation guides to align with existing SIEM rule format: - Added detailed context paragraphs explaining the threat and detection logic - Expanded investigation steps to 6-7 items with specific field references - Enhanced false positive analysis with 4-5 items and exclusion guidance - Added comprehensive response and remediation steps (6-7 items) Rules enhanced: - Defense Evasion: dylib_injection, gatekeeper_override, tcc_access - Persistence: shell_profile, hidden_plist, chromium_extension, startup_item, pkg_install_script, launch_agent_daemon - Execution: unusual_library_python - Lateral Movement: jamf_endpoint - Command and Control: google_calendar_c2, oast_domain, etherhiding, curl_from_app, curl_google_script, unsigned_binary - Collection: pbpaste, sensitive_file_compression
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- Added 'Resources: Investigation Guide' tag to all 19 rules with investigation guides - Fixed OAST rule investigation guide title to match rule name exactly: 'Network Connection to OAST Domain via Script Interpreter'
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Samirbous
approved these changes
Feb 6, 2026
rules/macos/command_and_control_aws_s3_connection_via_script.toml
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rules/macos/command_and_control_aws_s3_connection_via_script.toml
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rules/macos/command_and_control_aws_s3_connection_via_script.toml
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rules/macos/command_and_control_suspicious_curl_to_google_app_script.toml
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rules/macos/persistence_suspicious_launch_agent_or_launch_daemon.toml
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rules/macos/persistence_suspicious_launch_agent_or_launch_daemon.toml
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Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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…on.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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…on.toml Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
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Remove trailing comma before BY clause in STATS command that caused a parsing_exception. Co-authored-by: Cursor <cursoragent@cursor.com>
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Pull Request
Issue link(s):
#4456
Summary
This PR introduces 35 new macOS detection rules migrated from endpoint to enable late-stage kill chain detection through SIEM alerting.
Strategic Rationale
This migration follows the Kill Chain & Confidence Model for macOS detection strategy:
Endpoint Rules (BLOCK): Focus on early kill chain stages (Initial Access, Execution, Defense Evasion) where immediate blocking prevents compromise
SIEM Rules (ALERT): Focus on late kill chain stages (Persistence, Discovery, Collection, C2, Lateral Movement) where alerting enables investigation of potentially compromised systems
Rules selected for SIEM migration represent behaviors that:
Occur after initial compromise and require investigation rather than blocking
Have higher false positive potential in endpoint blocking context
Provide threat hunting value through correlation with other signals
Detect post-exploitation activity where blocking would not prevent the initial compromise