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

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: PDF with suspicious link and action-oriented language	Sublime Security	2mo ago May 18th, 2026	Credential Phishing PDF Social engineering Evasion File analysis URL analysis Content analysis URL screenshot
Attachment: PDF with W-9 form indicators	Sublime Security	30d ago Jun 26th, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand YARA File analysis Content analysis
Attachment: RFP/RFQ impersonating government entities	Sublime Security	2y ago Jan 30th, 2024	BEC/Fraud Impersonation: Brand PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Attachment: Romance scam with image lure and advance-fee or suspicious link indicators	Sublime Security	25d ago Jul 1st, 2026	BEC/Fraud Spam Social engineering Image as content Free email provider Free file host Out of band pivot Natural Language Understanding Header analysis Sender analysis Content analysis URL analysis File analysis
Attachment: Self-sender PDF with minimal content and view prompt	Sublime Security	5mo ago Feb 12th, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Suspicious employee policy update document lure	Sublime Security	7mo ago Dec 26th, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Suspicious PDF created with headless browser	Sublime Security	25d ago Jul 1st, 2026	Credential Phishing Evasion PDF Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: SVG file execution	Sublime Security	11mo ago Aug 8th, 2025	Malware/Ransomware Scripting Archive analysis Content analysis File analysis
Attachment: SVG file with HTML entity encoded href attributes	Sublime Security	2mo ago May 20th, 2026	Malware/Ransomware Credential Phishing Evasion HTML smuggling File analysis Content analysis
Attachment: SVG file with hyperlinks and cursor styling	Sublime Security	2mo ago May 20th, 2026	Credential Phishing Evasion Image as content File analysis XML analysis Content analysis
Attachment: USDA bid invitation impersonation	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Brand PDF Macros Social engineering Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Attachment: Web files with suspicious comments	Sublime Security	11mo ago Aug 8th, 2025	Credential Phishing Malware/Ransomware HTML smuggling Evasion File analysis HTML analysis Content analysis
BEC: Employee impersonation with subject manipulation	Sublime Security	6mo ago Jan 16th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Natural Language Understanding Sender analysis
BEC: Executive coaching vendor impersonation	Sublime Security	25d ago Jul 1st, 2026	BEC/Fraud Impersonation: Brand Social engineering Content analysis HTML analysis Natural Language Understanding
BEC: Financial fraud from newly registered sender domain	Sublime Security	1mo ago Jun 25th, 2026	BEC/Fraud Social engineering Spoofing Natural Language Understanding Whois Content analysis Sender analysis Header analysis
BEC/Fraud: Fake investment outreach from suspicious TLD	Sublime Security	1mo ago Jun 15th, 2026	BEC/Fraud Social engineering Header analysis Sender analysis Content analysis
BEC/Fraud: Generic scam attempt to undisclosed recipients	Sublime Security	2mo ago Apr 30th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
BEC/Fraud: Job scam fake thread or plaintext pivot to freemail	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Free email provider Out of band pivot Content analysis File analysis Natural Language Understanding
BEC/Fraud: Penpal scam	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply	Sublime Security	4mo ago Mar 11th, 2026	BEC/Fraud Social engineering Evasion Content analysis Header analysis Sender analysis
BEC/Fraud: Romance scam	Sublime Security	4mo ago Mar 9th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis
BEC/Fraud: Scam lure with freemail pivot	Sublime Security	2mo ago Apr 30th, 2026	BEC/Fraud Free email provider Out of band pivot Content analysis Header analysis Sender analysis
BEC/Fraud: Student loan callback phishing	Sublime Security	2mo ago May 4th, 2026	BEC/Fraud Free email provider Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
BEC/Fraud: Unsolicited business acquisition offer	Sublime Security	20d ago Jul 6th, 2026	BEC/Fraud Social engineering Content analysis
BEC/Fraud: Urgent language and suspicious sending/infrastructure patterns	Sublime Security	3mo ago Apr 17th, 2026	BEC/Fraud Callback Phishing Spam Impersonation: Brand Social engineering Free email provider Content analysis Header analysis Sender analysis Whois
BEC with unusual reply-to or return-path mismatch	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Evasion Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Benefits enrollment impersonation	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Body: Embedded email headers indicative of thread hijacking/abuse	Sublime Security	7mo ago Dec 1st, 2025	Credential Phishing BEC/Fraud Spam Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis
Body: Fake secure email portal with HTML obfuscation	Sublime Security	1mo ago Jun 18th, 2026	Credential Phishing Evasion Social engineering Spoofing Content analysis HTML analysis URL analysis Sender analysis Threat intelligence
Body HTML: Comment with 24-character hex token	Sublime Security	4mo ago Mar 17th, 2026	Spam Evasion Content analysis HTML analysis
Body: HTML whitespace stuffing with short initial message	Sublime Security	1mo ago May 29th, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Body: Invisible Unicode obfuscation student loan callback phishing	Sublime Security	1mo ago Jun 25th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering HTML analysis Content analysis
Body: PayApp transaction reference pattern	Sublime Security	3mo ago Apr 7th, 2026	Callback Phishing BEC/Fraud Impersonation: Brand Social engineering Content analysis
Body: Suspicious date format	Sublime Security	3mo ago Apr 22nd, 2026	Credential Phishing Evasion Spoofing Social engineering Content analysis
Body: Suspicious table template fingerprint	Sublime Security	1mo ago Jun 25th, 2026	Credential Phishing Social engineering Evasion HTML analysis Content analysis
Body: Yellow highlighted text markers	Sublime Security	1mo ago Jun 16th, 2026	Credential Phishing BEC/Fraud Evasion HTML analysis Content analysis
Brand impersonation: AARP	Sublime Security	17d ago Jul 9th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Brand impersonation: Adobe Sign with suspicious indicators	Sublime Security	1mo ago Jun 10th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis HTML analysis Sender analysis
Brand impersonation: Adobe with suspicious language and link	Sublime Security	20d ago Jul 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Sender analysis
Brand impersonation: AliExpress	Sublime Security	11mo ago Aug 5th, 2025	Callback Phishing Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis URL analysis
Brand impersonation: Amazon Web Services (AWS)	Sublime Security	20d ago Jul 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Optical Character Recognition Sender analysis Natural Language Understanding
Brand impersonation: Anthropic/Claude with newly registered domain	Sublime Security	2d ago Jul 24th, 2026	BEC/Fraud Spam Lookalike domain Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
Brand impersonation: Aquent	Sublime Security	9mo ago Oct 9th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Brand impersonation: Aramco	Sublime Security	5mo ago Jan 28th, 2026	BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis
Brand impersonation: AuthentiSign	Sublime Security	6mo ago Jan 21st, 2026	Credential Phishing BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis Sender analysis
Brand impersonation: Automobile assistance associations	Sublime Security	5d ago Jul 21st, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Header analysis Sender analysis
Brand impersonation: Bids & Tenders	Sublime Security	5d ago Jul 21st, 2026	Credential Phishing Impersonation: Brand Spoofing Social engineering Sender analysis URL analysis Content analysis
Brand impersonation: Binance	Sublime Security	10mo ago Sep 3rd, 2025	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis
Brand impersonation: Box file sharing service	Sublime Security	1mo ago Jun 5th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Sender analysis
Brand impersonation: Canada Revenue Agency	Sublime Security	1mo ago Jun 8th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis

620 Rules

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