Create: brand_impersonation_sofi - SoFi financial brand impersonation detection#4924
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Create: brand_impersonation_sofi - SoFi financial brand impersonation detection#4924missingn0pe wants to merge 1 commit into
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Detects phishing messages impersonating SoFi financial services through: - Brand-specific disclaimer patterns (SoFi Bank/Invest/Securities/Team/Tech/Wealth) - Copyright notices with company name - Official phone numbers (855-456-7634, 844-908-7634) - Corporate address (2750 E Cottonwood Pkwy, Salt Lake City, UT) - Observed TTPs (trade confirmation, self-directed investing account) FP reduction: - Excludes legitimate SoFi domains with DMARC pass (sofi.com, sofi.org) - Excludes Samsung.com (financial partnership) and investordelivery.com (delivery platform) - Excludes high-trust domains with passing authentication - Excludes newsletters and legitimate email threads - Uses word boundaries to prevent "Sofia" name and "SOFIDEL" company FPs Pattern modeled after brand_impersonation_robinhood.yml (Mark Morris). Hunt validation: 33 messages L90D, 14 net new detections. Ticket: ESC-18720 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Description
New detection rule targeting SoFi financial services brand impersonation. Catches phishing attempts using official company branding, corporate addresses, phone numbers, and observed credential theft tactics (trade confirmation lures).
Impact: 14 net new detections
Changes
Disclaimer Detection
Address Detection
TTP Detection (Observed Credential Theft)
FP Reduction
Associated samples
Associated hunts