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 Jul 25th, 2026

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GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Credential phishing: Email delivery failure impersonation	Sublime Security	1y ago Jul 16th, 2025	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis
Credential phishing: Engaging language and other indicators (untrusted sender)	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Credential phishing: Fake card notification with tracking lure	Sublime Security	4mo ago Mar 24th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding URL analysis Sender analysis
Credential phishing: Fake password expiration from new and unsolicited sender	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis
Credential phishing: Fake storage alerts (unsolicited)	Sublime Security	1mo ago Jun 18th, 2026	Credential Phishing Social engineering Content analysis Sender analysis
Credential phishing: Financial lure via ActiveCampaign infrastructure	Sublime Security	4mo ago Mar 27th, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Credential phishing: Generic document share with unicode and proceedural greeting template	Sublime Security	12d ago Jul 14th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Natural Language Understanding
Credential phishing: Generic document sharing	Sublime Security	1mo ago Jun 15th, 2026	Credential Phishing BEC/Fraud Social engineering Evasion Impersonation: Employee Content analysis Natural Language Understanding URL analysis Sender analysis
Credential phishing: Hyper-linked image leading to free file host	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Evasion Free file host Image as content Social engineering Content analysis Header analysis Sender analysis URL analysis
Credential phishing language and suspicious indicators (unknown sender)	Sublime Security	1y ago Jul 16th, 2025	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Credential phishing link (unknown sender)	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Social engineering Computer Vision Sender analysis URL analysis URL screenshot
Credential phishing: Onedrive impersonation	Sublime Security	10d ago Jul 16th, 2026	Credential Phishing Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Credential phishing: Re-Authentication lure	Sublime Security	9mo ago Oct 17th, 2025	Credential Phishing Social engineering Impersonation: Brand Natural Language Understanding Content analysis URL analysis Header analysis Sender analysis
Credential phishing: 'Secure message' and engaging language	Sublime Security	9d ago Jul 17th, 2026	Credential Phishing Social engineering Natural Language Understanding Sender analysis
Credential phishing: Suspicious e-sign agreement document notification	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Social engineering Content analysis Header analysis HTML analysis URL analysis Sender analysis
Credential phishing: Suspicious subject with urgent financial request and link	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Credential phishing: Tax form impersonation with payment request	Sublime Security	5mo ago Feb 13th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering PDF Content analysis Header analysis Sender analysis URL analysis
Credential Phishing via Dropbox comment abuse	Sublime Security	10mo ago Sep 22nd, 2025	Credential Phishing Evasion Out of band pivot Social engineering Content analysis Computer Vision Sender analysis
Credential Phishing: W-2 lure with inline SVG Windows logo	Sublime Security	3mo ago Apr 8th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis
Credential theft: JavaScript date manipulation in HTML body	Sublime Security	27d ago Jun 29th, 2026	Credential Phishing Evasion Scripting Social engineering HTML analysis Javascript analysis Natural Language Understanding
Credential theft with 'safe content' deception and social engineering topics	Sublime Security	5mo ago Feb 25th, 2026	Credential Phishing Social engineering Evasion Content analysis Natural Language Understanding
Cyrillic vowel substitution in subject or display name from unknown sender	Sublime Security	1y ago Jul 16th, 2025	Credential Phishing Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis
Cyrillic vowel substitutions with suspicious subject from unknown sender	Sublime Security	9d ago Jul 17th, 2026	Credential Phishing Evasion Impersonation: Brand Social engineering Content analysis Sender analysis
Deceptive Dropbox mention	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Free file host Free subdomain host Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis URL analysis
Display name and subject impersonation using recipient SLD (new sender)	Sublime Security	1y ago Jul 16th, 2025	Credential Phishing Social engineering Header analysis Sender analysis
Display Name Emoji with Financial Symbols	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Social engineering Evasion Content analysis Header analysis Sender analysis
Display name impersonation using recipient SLD	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Sender analysis
Domain impersonation: Freemail reply-to local lookalike with financial request	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
EML attachment with credential theft language (unknown sender)	Sublime Security	4mo ago Mar 17th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding Sender analysis Content analysis Header analysis
Employee impersonation: Payroll fraud	Sublime Security	1mo ago Jun 18th, 2026	BEC/Fraud Impersonation: Employee Free email provider Social engineering Content analysis Sender analysis
Employee impersonation with urgent request (untrusted sender)	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Extortion / sextortion in attachment from untrusted sender	Sublime Security	11mo ago Aug 5th, 2025	Extortion Social engineering Spoofing Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Extortion / Sextortion - PDF attachment leveraging breach data from freemail sender	Sublime Security	1y ago Feb 3rd, 2025	BEC/Fraud Free email provider PDF Social engineering QR code Content analysis File analysis QR code analysis
Extortion / sextortion (untrusted sender)	Sublime Security	2mo ago May 20th, 2026	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Fake email quarantine notification	Sublime Security	2d ago Jul 24th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis
Fake message thread - Untrusted sender with a mismatched freemail reply-to address	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
Fake message thread with a suspicious link and engaging language from an unknown sender	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Fake request for tax preparation	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Malware/Ransomware Social engineering Content analysis Natural Language Understanding Sender analysis
Fake scan-to-email message	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Free file host Social engineering Content analysis Optical Character Recognition Sender analysis URL analysis
Fake shipping notification with link to free file hosting	Sublime Security	2y ago Jul 10th, 2024	Spam Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Fake thread with suspicious indicators	Sublime Security	1mo ago Jun 17th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Fake voicemail notification (untrusted sender)	Sublime Security	1mo ago Jun 25th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Fake warning banner using confusable characters	Sublime Security	4mo ago Mar 2nd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis
Fake Zoho Sign template abuse	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Social engineering Content analysis HTML analysis URL analysis
Fake Zoom meeting invite with suspicious link	Sublime Security	1mo ago Jun 16th, 2026	Credential Phishing Impersonation: Brand Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
File sharing link with a suspicious subject	Sublime Security	5mo ago Feb 17th, 2026	BEC/Fraud Free file host Social engineering Header analysis Sender analysis URL analysis
Fraudulent e-commerce operators	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis Sender analysis
Fraudulent order confirmation/shipping notification from Chinese sender domain	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis Whois
Free email provider sender with mismatched provider reply-to	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Free email provider Social engineering Header analysis Sender analysis
Free subdomain link with login or captcha (untrusted sender)	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Free subdomain host Social engineering Computer Vision File analysis Sender analysis URL screenshot

678 Rules

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