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 Oct 23rd, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Evasion: Suspicious use of Unicode tag characters	Sublime Security	21d ago Oct 4th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Evasion: Variation selectors in subject line	Sublime Security	1mo ago Aug 28th, 2026	Spam Credential Phishing BEC/Fraud Evasion Content analysis
Evasion: Zero-width character stuffing in subject or sender name	Sublime Security	16d ago Oct 9th, 2026	Credential Phishing Spam Evasion Content analysis Header analysis
Extortion / sextortion in attachment from untrusted sender	Sublime Security	2mo ago Aug 6th, 2026	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	1mo ago Sep 23rd, 2026	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Fake email quarantine notification	Sublime Security	1mo ago Sep 23rd, 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	9mo 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 Sep 23rd, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Fake request for tax preparation	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Malware/Ransomware Social engineering Content analysis Natural Language Understanding Sender analysis
Fake scan-to-email message	Sublime Security	9mo 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 shipping notification with suspicious language	Sublime Security	2y ago May 3rd, 2024	Credential Phishing Spam Evasion Content analysis Natural Language Understanding
Fake thread with suspicious indicators	Sublime Security	1mo ago Sep 23rd, 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	19d ago Oct 6th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Fake warning banner using confusable characters	Sublime Security	7mo ago Mar 2nd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis
Fake Zoho Sign template abuse	Sublime Security	9mo 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	4mo ago Jun 16th, 2026	Credential Phishing Impersonation: Brand Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Fraudulent e-commerce operators	Sublime Security	1y 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	9mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis Whois
Free subdomain link with credential theft indicators	Sublime Security	2y ago Dec 12th, 2024	Credential Phishing Free subdomain host Content analysis Header analysis Natural Language Understanding Optical Character Recognition URL analysis URL screenshot
Google Accelerated Mobile Pages (AMP) abuse	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Impersonation: Brand Open redirect Computer Vision Content analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot
Google Drive direct download link from unsolicited sender	Sublime Security	1mo ago Sep 23rd, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Free file host URL analysis Sender analysis Content analysis
Google Notification alert link from non-Google sender	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis Sender analysis URL analysis
Google services using g.co shortlinks	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Evasion Free email provider Content analysis Header analysis Sender analysis URL analysis
Google share notification with suspicious comments	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Impersonation: VIP Free file host HTML analysis Header analysis Sender analysis Content analysis
Headers: Fake in-reply-to with wildcard sender and missing thread context	Sublime Security	9mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis Content analysis
Headers: X-Source-Auth mismatch with mismatched reply-to domain	Sublime Security	5mo ago May 21st, 2026	BEC/Fraud Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Honorific greeting BEC attempt with sender and reply-to mismatch	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
HR impersonation via e-sign agreement comment	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Credential Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
HTML: Bidirectional (BIDI) HTML override with right to left obfuscation	Sublime Security	1mo ago Aug 31st, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Scripting Content analysis HTML analysis
HTML content with print styling and credential theft language	Sublime Security	4mo ago Jun 16th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis Natural Language Understanding
HTML smuggling with atob in message body	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware HTML smuggling Content analysis HTML analysis
HTML: Template placeholders or recipient email in element class attributes	Sublime Security	2mo ago Aug 5th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering HTML analysis Content analysis
Image as content with a link to an open redirect	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Open redirect Social engineering Content analysis HTML analysis URL analysis
Impersonation: Australian Federal Police with criminal case language	Sublime Security	4mo ago Jun 4th, 2026	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Chrome Web Store policy	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Free email provider Lookalike domain Content analysis Header analysis HTML analysis Sender analysis URL analysis
Impersonation: Employee name in subject with suspicious sender	Sublime Security	3mo ago Jul 10th, 2026	BEC/Fraud Impersonation: Employee Impersonation: VIP Free email provider Social engineering Spoofing Sender analysis Content analysis
Impersonation: Employee using fabricated identity in initial contact	Sublime Security	4mo ago May 28th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Sender analysis
Impersonation: Fake Gmail attachment	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Impersonation: Brand Content analysis File analysis Sender analysis
Impersonation: Fake product discount promotion	Sublime Security	4mo ago Jun 16th, 2026	BEC/Fraud Social engineering Free file host Content analysis HTML analysis URL analysis
Impersonation: HR administrative center PDF password lure	Sublime Security	1mo ago Aug 28th, 2026	Credential Phishing Impersonation: Brand PDF Social engineering Evasion Content analysis Header analysis Sender analysis
Impersonation: Human Resources with link or attachment and engaging language	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Internal corporate services	Sublime Security	3mo ago Jul 22nd, 2026	Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: IT Department mailbox storage alert	Sublime Security	3mo ago Jul 7th, 2026	Credential Phishing Impersonation: Employee Social engineering Out of band pivot Content analysis
Impersonation: Legal firm with copyright infringement notice	Sublime Security	4mo ago Jun 24th, 2026	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Impersonation: Recipient organization in sender display name with credential theft image	Sublime Security	8mo ago Feb 17th, 2026	Credential Phishing Image as content Impersonation: Brand Social engineering Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Impersonation: Salesforce fake campaign failure notification	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Impersonation: SAM/SBA federal registration	Sublime Security	1mo ago Sep 11th, 2026	Credential Phishing BEC/Fraud Impersonation: Brand Social engineering Image as content Sender analysis Content analysis HTML analysis Header analysis
Impersonation: SharePoint reply header anomaly	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Social engineering Impersonation: Brand Evasion Spoofing Header analysis Content analysis Sender analysis

731 Rules

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