Monthly summary for 2025-10: Delivered a comprehensive set of security rule updates in sublime-rules, focusing on expanding impersonation coverage, strengthening account spoofing and service abuse detection, and improving fraud/ scam detection and reporting. Key outcomes include broader brand impersonation protection across Netflix, DHL, Amazon, FINRA, Robert Half, Microsoft, UHC, PNC Bank, Booking.com, Aquent, and TikTok; new detection capabilities for HTTP header-based spoofing and Cisco Secure Email abuse; enhanced monitoring for credential/phishing and scam scenarios; analytics and visibility improvements via Looker Studio; and metadata/brand consistency improvements to reduce false positives and improve maintainability. The work enhances risk reduction, accelerates triage, and demonstrates proficiency in YAML-based rule development, threat detection engineering, and cross-service collaboration.

September 2025 performance summary for sublime-security repositories (2025-09). Delivered a broad set of YAML-based detection rules and impersonation coverage updates across sublime-rules and static-files, driving stronger phishing detection, brand impersonation monitoring, and security hygiene. Key work included: new callback phishing in Yammer and fictitious invoice detection; comprehensive impersonation metadata updates and multi-brand/domain impersonation configurations; expanded brand impersonation coverage for Disney, Vanguard, Booking.com, Squarespace, Robert Half, and other platforms; QR code indicators and related components; enhancements to suspicious financial and credential phishing rules, including fake tax form documents and body extortion indicators; and email deliverability improvements via high-trust domain allowlists. These changes improve detection coverage, reduce false negatives, and strengthen monitoring for targeted attacks across multiple business units.

Month: 2025-08 — Focused on expanding threat coverage and strengthening phishing/imposter detection and brand impersonation workflows across Sublime Rules and Static Files. Delivered extensive YAML content updates, new templates, and domain/trust improvements; added support for self-service content creation and an organization brand names placeholder to enable future expansion. No major bugs fixed this month; efforts were dedicated to feature delivery, template enhancements, and process improvements that reduce detection gaps and accelerate incident response.

July 2025: Strengthened detection coverage for impersonation, phishing, and domain trust across Sublime Rules and static-files repositories. Delivered numerous YAML updates to indicators and metadata, enabling faster threat intel integration and more accurate detections. Implemented broad high-trust domain list expansions and multi-service impersonation configurations to reduce false positives and improve incident response readiness.

June 2025: Enhancements to impersonation detection with domain exclusions, credential phishing rule expansion for e-signature/doc sharing services, and Chrome PDF attachment detection refinements, all in the sublime-security/sublime-rules repo. These updates improve detection coverage, reduce false positives, and strengthen defense-in-depth.