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 Sep 9th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Adobe branded PDF file linking to a password-protected file from untrusted sender	Sublime Security	4mo ago Apr 29th, 2026	Malware/Ransomware Encryption Evasion Impersonation: Brand PDF Archive analysis File analysis Natural Language Understanding Optical Character Recognition
Advance Fee Fraud (AFF) from freemail provider or suspicious TLD	Sublime Security	2mo ago Jun 15th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Attachment: Calendar invite with Google redirect and invoice request	Sublime Security	4mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud ICS Phishing Open redirect Social engineering File analysis Natural Language Understanding URL analysis
Attachment: Cold outreach with invitation subject and not attachment	Sublime Security	5mo ago Apr 3rd, 2026	Spam Social engineering Image as content Content analysis Natural Language Understanding File analysis
Attachment: Compensation review lure with QR code	Sublime Security	4mo ago Apr 14th, 2026	Credential Phishing PDF QR code Social engineering File analysis Optical Character Recognition QR code analysis Natural Language Understanding Sender analysis Header analysis
Attachment: Compensation-themed DOCX with QR code credential theft	Sublime Security	3mo ago May 29th, 2026	Credential Phishing QR code Social engineering Impersonation: Brand File analysis Optical Character Recognition QR code analysis Natural Language Understanding Exif analysis Content analysis
Attachment: Credit card application with WhatsApp contact	Sublime Security	9mo ago Nov 20th, 2025	BEC/Fraud Social engineering Out of band pivot Content analysis File analysis Natural Language Understanding QR code analysis
Attachment: EML with link to credential phishing page	Sublime Security	1mo ago Jul 27th, 2026	Credential Phishing Evasion Free file host Free subdomain host Social engineering Computer Vision Content analysis File analysis Header analysis HTML analysis Natural Language Understanding Optical Character Recognition URL analysis URL screenshot
Attachment: Encrypted PDF with credential theft body	Sublime Security	6d ago Sep 4th, 2026	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Attachment: Encrypted PDF with credential theft language in EML	Sublime Security	6d ago Sep 4th, 2026	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Attachment: Fake attachment image lure	Sublime Security	3mo ago Jun 5th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Social engineering File analysis Natural Language Understanding Optical Character Recognition
Attachment: Fake scan-to-email	Sublime Security	11mo ago Sep 22nd, 2025	Credential Phishing Free file host Image as content PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Attachment: Fake secure message and suspicious indicators	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Image as content Impersonation: Brand Social engineering Content analysis File analysis Header analysis Natural Language Understanding Sender analysis
Attachment: Fake Slack installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis
Attachment: Fake Zoom installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis
Attachment: Fictitious invoice using LinkedIn's address	Sublime Security	1mo ago Jul 29th, 2026	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis
Attachment: GZ archive with credential theft content	Sublime Security	8d ago Sep 2nd, 2026	Credential Phishing Evasion Archive analysis File analysis YARA Natural Language Understanding HTML analysis URL analysis
Attachment: HTML smuggling - QR Code with suspicious links	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing QR code Computer Vision Header analysis Natural Language Understanding QR code analysis Sender analysis URL analysis URL screenshot
Attachment: ICS calendar invite with photo/file share lure	Sublime Security	6h ago Sep 9th, 2026	Credential Phishing Free email provider Social engineering Open redirect Image as content File analysis Natural Language Understanding Content analysis URL analysis Sender analysis Header analysis
Attachment: ICS file with credential theft indicators	Sublime Security	6d ago Sep 4th, 2026	ICS Phishing Credential Phishing Free file host Free subdomain host Social engineering File analysis Natural Language Understanding URL analysis Whois
Attachment: Legal themed message or PDF with suspicious indicators	Sublime Security	5mo 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: Microsoft impersonation via PDF with link and suspicious language	Sublime Security	3mo ago May 14th, 2026	Credential Phishing Malware/Ransomware Image as content Impersonation: Brand PDF Scripting Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Sender analysis
Attachment: Office file contains OLE relationship to credential phishing page	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering File analysis HTML analysis Natural Language Understanding OLE analysis URL analysis
Attachment: PDF bid/proposal lure with credential theft indicators	Sublime Security	5mo 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 credential phishing via wkhtmltopdf/Qt with suspicious link	Sublime Security	8d ago Sep 2nd, 2026	Credential Phishing PDF Open redirect Social engineering Exif analysis Optical Character Recognition Natural Language Understanding URL analysis File analysis
Attachment: PDF file with low reputation link to ZIP file (unsolicited)	Michael Tingle	8mo ago Jan 12th, 2026	Malware/Ransomware Evasion PDF Archive analysis File analysis Natural Language Understanding Sender analysis URL analysis
Attachment: PDF proposal with credential theft indicators	Sublime Security	17d ago Aug 24th, 2026	Credential Phishing PDF Social engineering Evasion File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: PDF with credential theft language and invalid reply-to domain	Sublime Security	5mo ago Apr 10th, 2026	Credential Phishing PDF Social engineering Spoofing File analysis Header analysis Natural Language Understanding Content analysis
Attachment: PDF with credential theft language and link to a free subdomain (unsolicited)	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Free subdomain host PDF Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Attachment: PDF with Microsoft Purview message impersonation	Sublime Security	10mo ago Nov 10th, 2025	Credential Phishing Impersonation: Brand PDF Social engineering File analysis Natural Language Understanding Content analysis
Attachment: PDF with QR code containing recipient-specific credential theft content	Sublime Security	3mo ago Jun 10th, 2026	Credential Phishing PDF QR code Social engineering File analysis Natural Language Understanding QR code analysis Content analysis
Attachment: PDF with suspicious language and redirect to suspicious file type	Sublime Security	8mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion PDF File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: QR code link with base64-encoded recipient address	Sublime Security	4mo ago Apr 29th, 2026	Credential Phishing QR code Image as content Social engineering Evasion PDF Macros Computer Vision File analysis Natural Language Understanding QR code analysis Sender analysis
Attachment: QR code with credential phishing indicators	Sublime Security	1mo ago Jul 27th, 2026	Credential Phishing QR code Social engineering Computer Vision Header analysis Natural Language Understanding QR code analysis Sender analysis URL analysis URL screenshot
Attachment: RFC822 containing suspicious file sharing language with links from untrusted sender	Sublime Security	10mo ago Nov 4th, 2025	Credential Phishing Evasion Social engineering File analysis Header analysis Natural Language Understanding Sender 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	2mo 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	1y 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: Word document with hyperlink and fraud language	Sublime Security	6d ago Sep 4th, 2026	Credential Phishing BEC/Fraud Free email provider Social engineering Evasion File analysis XML analysis HTML analysis URL analysis Natural Language Understanding Sender analysis
BEC: Employee impersonation with subject manipulation	Sublime Security	7mo ago Jan 16th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Natural Language Understanding Sender analysis
BEC: Executive coaching vendor impersonation	Sublime Security	2mo 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	2mo 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	30d ago Aug 11th, 2026	BEC/Fraud Social engineering Header analysis Sender analysis Content analysis Natural Language Understanding
BEC/Fraud: Generic scam attempt to undisclosed recipients	Sublime Security	1mo ago Jul 27th, 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	3mo ago Jun 5th, 2026	BEC/Fraud Free email provider Out of band pivot Content analysis File analysis Natural Language Understanding
BEC/Fraud: Student loan callback phishing	Sublime Security	4mo ago May 4th, 2026	BEC/Fraud Free email provider Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
BEC: Tax document request	Sublime Security	1mo ago Aug 6th, 2026	BEC/Fraud Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
BEC: Wealth management lure from newly registered domain	Sublime Security	2d ago Sep 8th, 2026	BEC/Fraud Social engineering Whois Content analysis Natural Language Understanding
BEC with unusual reply-to or return-path mismatch	Sublime Security	3mo ago Jun 5th, 2026	BEC/Fraud Evasion Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Body: AI-generated invoice template artifacts	Sublime Security	19d ago Aug 22nd, 2026	Credential Phishing BEC/Fraud Social engineering Spoofing Natural Language Understanding HTML analysis Header analysis Sender analysis

283 Rules

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