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 20th, 2026

Feed Source

GitHub

Attack Type is

Rule Name & Severity	Author	Last Updated	Labels
Advance Fee Fraud (AFF) from freemail provider or suspicious TLD	Sublime Security	1mo ago Jun 15th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
AnonymousFox indicators	Sublime Security	13d ago Jul 8th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Header analysis Sender analysis
Attachment: Calendar file with invisible Unicode characters	Sublime Security	2mo ago Apr 28th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Evasion ICS Phishing File analysis Content analysis
Attachment: Calendar invite with Google redirect and invoice request	Sublime Security	2mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud ICS Phishing Open redirect Social engineering File analysis Natural Language Understanding URL analysis
Attachment: Canva PDF with susupicious author metadata	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Credential Phishing Free email provider PDF Exif analysis File analysis
Attachment: Credit card application with WhatsApp contact	Sublime Security	8mo ago Nov 20th, 2025	BEC/Fraud Social engineering Out of band pivot Content analysis File analysis Natural Language Understanding QR code analysis
Attachment: Duplicated header pages in fraudulent multi-page PDF Request for Quotation	Sublime Security	26d ago Jun 25th, 2026	BEC/Fraud PDF Social engineering Optical Character Recognition Content analysis File analysis
Attachment: EML with Sharepoint link likely unrelated to sender	Sublime Security	10mo ago Sep 23rd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Evasion File analysis URL analysis Header analysis Sender analysis
Attachment: Encrypted zip file with payment-related lure	Sublime Security	7mo ago Nov 25th, 2025	BEC/Fraud Malware/Ransomware Encryption Evasion Social engineering Archive analysis Content analysis File analysis
Attachment: Fake lawyer & sports agent identities	Sublime Security	5mo ago Jan 26th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: Fictitious invoice using LinkedIn's address	Sublime Security	10mo ago Sep 3rd, 2025	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis
Attachment: ICS calendar file with suspicious UID domain	Sublime Security	19d ago Jul 2nd, 2026	ICS Phishing Credential Phishing BEC/Fraud Social engineering File analysis Content analysis
Attachment: ICS file with meeting prefix	Sublime Security	2mo ago Apr 28th, 2026	BEC/Fraud Credential Phishing ICS Phishing Social engineering File analysis Header analysis
Attachment: ICS with employee policy review lure	Sublime Security	2mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud Evasion ICS Phishing Social engineering File analysis Content analysis
Attachment: Invoice and W-9 PDFs with suspicious creators	Sublime Security	25d ago Jun 26th, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand File analysis Optical Character Recognition Exif analysis Content analysis
Attachment: Legal themed message or PDF with suspicious indicators	Sublime Security	3mo ago Apr 3rd, 2026	Credential Phishing Extortion BEC/Fraud Evasion PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition URL analysis Whois Header analysis Exif analysis
Attachment: Link to Doubleclick.net open redirect	Sublime Security	2mo ago Apr 29th, 2026	BEC/Fraud Credential Phishing Evasion Open redirect Social engineering Content analysis File analysis URL analysis
Attachment: PDF bid/proposal lure with credential theft indicators	Sublime Security	3mo ago Mar 27th, 2026	BEC/Fraud Credential Phishing PDF Social engineering Free file host Free subdomain host File analysis Content analysis Optical Character Recognition Natural Language Understanding URL analysis Exif analysis
Attachment: PDF contains W9 or invoice YARA signatures	Sublime Security	4mo ago Mar 18th, 2026	BEC/Fraud Credential Phishing PDF Social engineering File analysis YARA
Attachment: PDF file with link to fake Bitcoin exchange	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Free email provider Impersonation: Brand PDF Social engineering Exif analysis File analysis Sender analysis URL analysis
Attachment: PDF file with recipient domain and ATT eCheckRun pattern	Sublime Security	1mo ago Jun 16th, 2026	BEC/Fraud PDF Social engineering File analysis Content analysis
Attachment: PDF generated with wkhtmltopdf tool and default title	Sublime Security	7mo ago Dec 19th, 2025	BEC/Fraud Callback Phishing Credential Phishing Malware/Ransomware PDF Evasion File analysis Exif analysis
Attachment: PDF Object Hash associated with a fake invoice and a W-9	Sublime Security	19d ago Jul 2nd, 2026	BEC/Fraud PDF Evasion File analysis Threat Intelligence
Attachment: PDF with fake invoice using suspicious font sizing	Sublime Security	1mo ago Jun 9th, 2026	BEC/Fraud Callback Phishing PDF Social engineering File analysis YARA Content analysis
Attachment: PDF with self-service platform links with self sender or blank recipients	Sublime Security	1mo ago Jun 10th, 2026	BEC/Fraud Credential Phishing PDF Evasion Free file host File analysis Exif analysis URL analysis Sender analysis
Attachment: PDF with specific W-9 lure	Sublime Security	20d ago Jul 1st, 2026	BEC/Fraud PDF Social engineering File analysis YARA
Attachment: PDF with suspicious internal object reference identifier	Sublime Security	22d ago Jun 29th, 2026	BEC/Fraud PDF Content analysis File analysis
Attachment: PDF with W-9 form indicators	Sublime Security	25d 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	20d 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: 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
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	20d 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	26d 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	15d 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
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: Invisible Unicode obfuscation student loan callback phishing	Sublime Security	26d 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: 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	12d ago Jul 9th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis

223 Rules

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