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

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Spam: URL shortener with short body content and emojis	Sublime Security	12d ago Jan 12th, 2026	Spam Free email provider Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-url-shortener-with-short-body-content-and-emojis-b7797e4c
Suspicious attachment with unscannable Cloudflare link	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Evasion PDF Social engineering Impersonation: Employee Impersonation: VIP File analysis URL analysis Sender analysis Content analysis Header analysis Natural Language Understanding	/feeds/core/detection-rules/suspicious-attachment-with-unscannable-cloudflare-link-00f92b6f
Suspicious Links to Cloudflare R2 and Edge Services	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Free file host Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/suspicious-links-to-cloudflare-r2-and-edge-services-5dd3e5c8
Suspicious link to Looker Studio (lookerstudio.google.com) from a new and unsolicited sender	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/suspicious-link-to-looker-studio-lookerstudiogooglecom-from-a-new-and-unsolicited-sender-dbb50cb4
Suspicious message with unscannable Cloudflare link	Sublime Security	4mo ago Sep 22nd, 2025	Credential Phishing Content analysis Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/suspicious-message-with-unscannable-cloudflare-link-70ea21f9
Suspicious message with unscannable Vercel link	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/suspicious-message-with-unscannable-vercel-link-b5acffe7
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois	/feeds/core/detection-rules/suspicious-newly-registered-reply-to-domain-with-engaging-financial-or-urgent-language-db4d9bb3
Suspicious Office 365 app authorization (OAuth) link	Sublime Security	11mo ago Feb 4th, 2025	Credential Phishing URL analysis	/feeds/core/detection-rules/suspicious-office-365-app-authorization-oauth-link-13a8c430
Suspicious recipient pattern and language with low reputation link to login	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/suspicious-recipient-pattern-and-language-with-low-reputation-link-to-login-a8ea0402
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 recipients pattern with no Compauth pass and suspicious content	Sublime Security	12d ago Jan 12th, 2026	Content analysis Computer Vision Header analysis Natural Language Understanding URL analysis URL screenshot	/feeds/core/detection-rules/suspicious-recipients-pattern-with-no-compauth-pass-and-suspicious-content-34fb65f6
Suspicious SharePoint file sharing	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Free email provider Free file host OneNote PDF Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/suspicious-sharepoint-file-sharing-971c3d9c
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
URLhaus: Malicious domain in message body or pdf attachment (trusted reporters)	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware PDF File analysis Threat intelligence URL analysis	/feeds/core/detection-rules/urlhaus-malicious-domain-in-message-body-or-pdf-attachment-trusted-reporters-cfca2986
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
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
Zoom Events newsletter abuse	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Free file host Free subdomain host Social engineering Impersonation: Brand Header analysis HTML analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/zoom-events-newsletter-abuse-c8fce846

369 Rules

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