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This repo contains open-source Rules for Sublime, a free and open platform for detecting and preventing email attacks like BEC, malware, and credential phishing.

Sublime Security

Last updated Jul 17th, 2025

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Rule Name & Severity	Author	Last Updated	Labels
Brand Impersonation: Vanguard	Sublime Security	3mo ago Apr 11th, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Impersonation: Brand Natural Language Understanding Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-vanguard-3bd048fe
Brand Impersonation: WeTransfer	Sublime Security	4d ago Jul 16th, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Impersonation: Brand Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-wetransfer-e37885ad
Encrypted Microsoft Office Files From Untrusted Senders	Sublime Security	17d ago Jul 3rd, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Encryption Evasion File analysis YARA Sender analysis	/feeds/core/detection-rules/encrypted-microsoft-office-files-from-untrusted-senders-eb7b26e7
Extortion / Sextortion in Attachment From Untrusted Sender	Sublime Security	4d ago Jul 16th, 2025	Extortion Social engineering Spoofing Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/extortion-sextortion-in-attachment-from-untrusted-sender-3cb8d32c
Extortion / sextortion (untrusted sender)	Sublime Security	4d ago Jul 16th, 2025	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/extortion-sextortion-untrusted-sender-265913eb
Mismatched Links: Free File Share With Urgent Language	Sublime Security	24d ago Jun 26th, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Free file host Social engineering Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/mismatched-links-free-file-share-with-urgent-language-478334c8