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

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: PDF including a Microsoft lure with specific signature	Sublime Security	24d ago Oct 1st, 2026	Credential Phishing PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: PDF proposal with credential theft indicators	Sublime Security	2mo ago Aug 24th, 2026	Credential Phishing PDF Social engineering Evasion File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: PDF RFP lure	Sublime Security	1mo ago Sep 3rd, 2026	Credential Phishing BEC/Fraud PDF Social engineering YARA File analysis
Attachment: PDF templated investment lure	Sublime Security	2mo ago Aug 19th, 2026	Malware/Ransomware Credential Phishing PDF Social engineering YARA File analysis
Attachment: PDF W9 signature reuse	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud PDF Social engineering File analysis YARA
Attachment: PDF with a suspicious string and single URL	Sublime Security	2d ago Oct 23rd, 2026	Credential Phishing PDF Social engineering Evasion Content analysis File analysis URL analysis Exif analysis
Attachment: PDF with bolded passcode	Sublime Security	1mo ago Sep 8th, 2026	Credential Phishing PDF Evasion Social engineering HTML analysis Content analysis File analysis
Attachment: PDF with credential theft language and invalid reply-to domain	Sublime Security	6mo 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	9mo 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 dub.sh shortened link	Sublime Security	1mo ago Sep 9th, 2026	Credential Phishing BEC/Fraud PDF Social engineering Evasion File analysis URL analysis
Attachment: PDF with embedded box-lure and javascript	Sublime Security	2mo ago Aug 19th, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion File analysis YARA
Attachment: PDF with fake invoice using suspicious font sizing	Sublime Security	4mo ago Jun 9th, 2026	BEC/Fraud Callback Phishing PDF Social engineering File analysis YARA Content analysis
Attachment: PDF with Microsoft compensation lure	Sublime Security	6d ago Oct 19th, 2026	BEC/Fraud Credential Phishing PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: PDF with Microsoft Purview message impersonation	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Impersonation: Brand PDF Social engineering File analysis Natural Language Understanding Content analysis
Attachment: PDF with multistage landing - ClickUp abuse	Sublime Security	7mo ago Feb 27th, 2026	Credential Phishing Evasion Free file host Free subdomain host PDF Social engineering File analysis URL analysis Whois
Attachment: PDF with personal Microsoft OneNote URL	Sublime Security	10mo ago Dec 4th, 2025	Credential Phishing PDF Social engineering File analysis Content analysis
Attachment: PDF with QR code containing recipient-specific credential theft content	Sublime Security	1mo ago Sep 22nd, 2026	Credential Phishing PDF QR code Social engineering File analysis Natural Language Understanding QR code analysis Content analysis
Attachment: PDF with quote lure	Sublime Security	3mo ago Jul 1st, 2026	Credential Phishing Malware/Ransomware PDF Social engineering File analysis YARA
Attachment: PDF with recipient email in link	Sublime Security	1mo ago Sep 22nd, 2026	Credential Phishing PDF QR code Encryption Social engineering File analysis QR code analysis URL analysis
Attachment: PDF with secure document acknowledgment prompt	Sublime Security	3mo ago Jul 17th, 2026	Credential Phishing Evasion PDF Social engineering Image as content Impersonation: Brand Content analysis File analysis YARA
Attachment: PDF with specific blurred lure	Sublime Security	24d ago Oct 1st, 2026	Credential Phishing PDF Social engineering File analysis YARA
Attachment: PDF with specific W-9 lure	Sublime Security	3mo ago Jul 1st, 2026	BEC/Fraud PDF Social engineering File analysis YARA
Attachment: PDF with suspicious document view lure	Sublime Security	3mo ago Jul 14th, 2026	Malware/Ransomware PDF Social engineering Content analysis File analysis YARA
Attachment: PDF with suspicious link and action-oriented language	Sublime Security	2mo ago Aug 18th, 2026	Credential Phishing PDF Social engineering Evasion File analysis URL analysis Content analysis URL screenshot
Attachment: PDF with suspicious view document characteristics	Sublime Security	6mo ago Apr 23rd, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion File analysis YARA
Attachment: PDF with version-only producer and default metadata	Sublime Security	30d ago Sep 25th, 2026	BEC/Fraud Credential Phishing Image as content Social engineering Evasion Exif analysis Optical Character Recognition Content analysis
Attachment: PDF with View RFP Document lure with external link	Sublime Security	1mo ago Aug 27th, 2026	Credential Phishing PDF Social engineering File analysis URL analysis Content analysis
Attachment: PDF with W-9 form indicators	Sublime Security	4mo ago Jun 26th, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand YARA File analysis Content analysis
Attachment: Personalized fake order/invoice file naming pattern	Sublime Security	27d ago Sep 28th, 2026	Callback Phishing Social engineering Free email provider Impersonation: Brand File analysis Content analysis Sender analysis
Attachment: QR code link with encoded recipient address	Sublime Security	1mo ago Sep 22nd, 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 Sep 23rd, 2026	Credential Phishing QR code Social engineering Computer Vision Header analysis Natural Language Understanding QR code analysis Sender analysis URL analysis URL screenshot
Attachment: QR code with recipient targeting and special characters	Sublime Security	8mo ago Feb 21st, 2026	Credential Phishing QR code Social engineering Evasion File analysis QR code analysis URL analysis Computer Vision
Attachment: QR code with suspicious URL patterns in EML file	Sublime Security	8mo ago Feb 21st, 2026	Credential Phishing QR code Evasion Social engineering Archive analysis File analysis QR code analysis URL analysis
Attachment: QuickBooks PDF lure	Sublime Security	2mo ago Aug 20th, 2026	BEC/Fraud Malware/Ransomware PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: Re-stamped invoice PDF with IRS references from external sender	Sublime Security	9d ago Oct 16th, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand Exif analysis File analysis Optical Character Recognition
Attachment: RFC822 containing suspicious file sharing language with links from untrusted sender	Sublime Security	26d ago Sep 29th, 2026	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: Risk assessment PDF with inline image	Sublime Security	2mo ago Aug 25th, 2026	Malware/Ransomware Spam Image as content PDF Social engineering File analysis HTML analysis Header analysis Sender analysis
Attachment: Romance scam with image lure and advance-fee or suspicious link indicators	Sublime Security	3mo 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	8mo ago Feb 12th, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Small text file with link containing recipient email address	Sublime Security	5mo ago May 14th, 2026	Credential Phishing Evasion Social engineering File analysis URL analysis
Attachment: Soda PDF producer with encryption themes	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing PDF Social engineering File analysis Optical Character Recognition
Attachment: Suspicious employee policy update document lure	Sublime Security	10mo ago Dec 26th, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Suspicious use of Unicode tag characters in ICS File	Sublime Security	21d ago Oct 4th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Attachment: Targeted DOCX with personalized recipient acknowledgement lure	Sublime Security	2mo ago Aug 4th, 2026	Credential Phishing Social engineering Archive analysis Content analysis File analysis XML 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 with VBA macros from employee impersonation (unsolicited)	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Impersonation: Employee Macros Social engineering Archive analysis File analysis Macro analysis Sender analysis
Attachment: Word document with hyperlink and fraud language	Sublime Security	1mo 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
Attachment: XLS with legal confidentiality disclaimer	Sublime Security	1mo ago Sep 10th, 2026	Malware/Ransomware BEC/Fraud Social engineering Macros File analysis Content analysis
BEC: Employee impersonation with subject manipulation	Sublime Security	9mo ago Jan 16th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Natural Language Understanding Sender analysis

850 Rules

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