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

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: QuickBooks PDF lure	Sublime Security	21d ago Aug 20th, 2026	BEC/Fraud Malware/Ransomware PDF Impersonation: Brand Social engineering YARA File analysis
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: Risk assessment PDF with inline image	Sublime Security	16d 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	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: Self-sender PDF with minimal content and view prompt	Sublime Security	6mo 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	3mo 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	8mo ago Dec 26th, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Targeted DOCX with personalized recipient acknowledgement lure	Sublime Security	1mo 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	8mo 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	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: Penpal scam	Sublime Security	1mo ago Jul 27th, 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	6mo ago Mar 11th, 2026	BEC/Fraud Social engineering Evasion Content analysis Header analysis Sender analysis
BEC/Fraud: Romance scam	Sublime Security	6mo ago Mar 9th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis
BEC/Fraud: Self-addressed reply with unrelated link in ongoing thread	Sublime Security	15d ago Aug 26th, 2026	BEC/Fraud Credential Phishing Social engineering Out of band pivot URL analysis Header analysis Sender analysis Content analysis
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/Fraud: Unsolicited business acquisition offer	Sublime Security	2mo ago Jul 6th, 2026	BEC/Fraud Social engineering Content analysis
BEC/Fraud: Urgent language and suspicious sending/infrastructure patterns	Sublime Security	4mo ago Apr 17th, 2026	BEC/Fraud Callback Phishing Spam Impersonation: Brand Social engineering Free email provider Content analysis Header analysis Sender analysis Whois
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
Benefits enrollment impersonation	Sublime Security	3mo ago Jun 5th, 2026	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis 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
Body: CSS clamp() font obfuscation	Sublime Security	9d ago Sep 1st, 2026	Credential Phishing Evasion Social engineering HTML analysis URL analysis Content analysis
Body: Embedded email headers indicative of thread hijacking/abuse	Sublime Security	9mo 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	2mo ago Jun 18th, 2026	Credential Phishing Evasion Social engineering Spoofing Content analysis HTML analysis URL analysis Sender analysis Threat intelligence
Body HTML: Recipient SLD in HTML class	Sublime Security	11mo ago Sep 23rd, 2025	Credential Phishing Evasion Social engineering HTML analysis Header analysis Sender analysis
Body: HTML whitespace stuffing with short initial message	Sublime Security	13d ago Aug 28th, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Body: Invisible Unicode obfuscation student loan callback phishing	Sublime Security	2mo ago Jun 25th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering HTML analysis Content analysis
Body: PayApp transaction reference pattern	Sublime Security	5mo ago Apr 7th, 2026	Callback Phishing BEC/Fraud Impersonation: Brand Social engineering Content analysis
Body: Suspicious date format	Sublime Security	4mo ago Apr 22nd, 2026	Credential Phishing Evasion Spoofing Social engineering Content analysis
Body: Suspicious table template fingerprint	Sublime Security	2mo ago Jun 25th, 2026	Credential Phishing Social engineering Evasion HTML analysis Content analysis
Brand impersonation: AARP	Sublime Security	6d ago Sep 4th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Brand impersonation: Adobe Sign with suspicious indicators	Sublime Security	3mo 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	2mo ago Jul 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Sender analysis
Brand impersonation: ADP	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis
Brand impersonation: AliExpress	Sublime Security	1y ago Aug 5th, 2025	Callback Phishing Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis URL analysis
Brand impersonation: Amazon	Sublime Security	1mo ago Aug 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis
Brand impersonation: Amazon Web Services (AWS)	Sublime Security	1mo ago Jul 27th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Optical Character Recognition Sender analysis Natural Language Understanding
Brand impersonation: Amazon with suspicious attachment	Sublime Security	4mo ago Apr 14th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: American Express (AMEX)	Sublime Security	6mo ago Feb 17th, 2026	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Header analysis Sender analysis
Brand impersonation: Anthropic/Claude with newly registered domain	Sublime Security	1mo ago Jul 24th, 2026	BEC/Fraud Spam Lookalike domain Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
Brand impersonation: Apple	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis

764 Rules

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