Sublime Core Feed

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 Jan 23rd, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Suspicious recipients pattern with NLU credential theft indicators	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/suspicious-recipients-pattern-with-nlu-credential-theft-indicators-8e121c3e
Suspicious sender display name with long procedurally generated text blob	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Sender analysis	/feeds/core/detection-rules/suspicious-sender-display-name-with-long-procedurally-generated-text-blob-2a40b043
Suspicious subject with long procedurally generated text blob	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Spam Evasion Content analysis Sender analysis	/feeds/core/detection-rules/suspicious-subject-with-long-procedurally-generated-text-blob-e819593d
Truth Social infrastructure abuse via link redirect	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/truth-social-infrastructure-abuse-via-link-redirect-aaaa30a8
Twitter infrastructure abuse via link shortener	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/twitter-infrastructure-abuse-via-link-shortener-99ca165e
Unicode QR code	Sublime Security	5mo ago Aug 25th, 2025	Credential Phishing Evasion Content analysis Sender analysis QR code analysis	/feeds/core/detection-rules/unicode-qr-code-1a0bdd25
Unusually long local part from untrusted sender address	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Spam Evasion Header analysis Sender analysis	/feeds/core/detection-rules/unusually-long-local-part-from-untrusted-sender-address-91a9cd45
URI protocol handler: search-ms	Sublime Security	12d ago Jan 12th, 2026	Malware/Ransomware Evasion File analysis HTML analysis	/feeds/core/detection-rules/uri-protocol-handler-search-ms-ee27d9c0
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters	@delivr_to	12d ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis	/feeds/core/detection-rules/url-with-unicode-u2044-or-u2215-characters-12069f5b
Vendor compromise: GovDelivery message with suspicious link	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free subdomain host IPFS Social engineering Evasion Impersonation: Brand Natural Language Understanding URL analysis Whois	/feeds/core/detection-rules/vendor-compromise-govdelivery-message-with-suspicious-link-0d2d5172
Venmo payment request abuse	Sublime Security	4mo ago Sep 5th, 2025	Callback Phishing BEC/Fraud Social engineering Impersonation: Brand Evasion Natural Language Understanding Content analysis Sender analysis HTML analysis	/feeds/core/detection-rules/venmo-payment-request-abuse-4450639a
VIP impersonation: Fake thread with display name match, email mismatch	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois	/feeds/core/detection-rules/vip-impersonation-fake-thread-with-display-name-match-email-mismatch-11cc3e28
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	2mo ago Nov 12th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/vip-impersonation-via-google-group-relay-with-suspicious-indicators-57f9cd3b
Xero infrastructure abuse	Sublime Security	2mo ago Nov 3rd, 2025	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/xero-infrastructure-abuse-918c4bd3

314 Rules

Page 7 of 7