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 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
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
Benefits enrollment impersonation	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Canva infrastructure abuse	Sublime Security	5mo ago May 4th, 2026	BEC/Fraud Callback Phishing Social engineering Impersonation: Brand Impersonation: Employee Free email provider Natural Language Understanding Sender analysis Content analysis
Credential phishing: Generic document sharing	Sublime Security	21d ago Oct 4th, 2026	Credential Phishing BEC/Fraud Social engineering Evasion Impersonation: Employee Content analysis Natural Language Understanding URL analysis Sender analysis
Employee impersonation: Payroll fraud	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud Impersonation: Employee Free email provider Social engineering Content analysis Sender analysis
Employee impersonation with urgent request (untrusted sender)	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Headers: System account impersonation with empty sender address	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Social engineering Spoofing Header analysis Sender analysis Natural Language Understanding
Impersonation: Employee name in subject with suspicious sender	Sublime Security	3mo ago Jul 10th, 2026	BEC/Fraud Impersonation: Employee Impersonation: VIP Free email provider Social engineering Spoofing Sender analysis Content analysis
Impersonation: Employee using fabricated identity in initial contact	Sublime Security	4mo ago May 28th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Sender analysis
Impersonation: Human Resources with link or attachment and engaging language	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Internal corporate services	Sublime Security	3mo ago Jul 22nd, 2026	Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: IT Department mailbox storage alert	Sublime Security	3mo ago Jul 7th, 2026	Credential Phishing Impersonation: Employee Social engineering Out of band pivot Content analysis
Link: HR impersonation with suspicious domain indicators and credential theft	Sublime Security	10mo ago Dec 3rd, 2025	Credential Phishing Impersonation: Employee Social engineering Lookalike domain Content analysis Natural Language Understanding Computer Vision URL analysis URL screenshot
Link: Malformed subdomain ending in hyphen	Sublime Security	19d ago Oct 6th, 2026	Credential Phishing Social engineering Lookalike domain Impersonation: Brand Impersonation: Employee URL analysis Content analysis
Link: SharePoint filename matches org name	Sublime Security	8mo ago Feb 6th, 2026	Credential Phishing Impersonation: Employee Social engineering Content analysis URL analysis
Sender: Local part built from recipient domain and mailbox	Sublime Security	2mo ago Aug 20th, 2026	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Header analysis Sender analysis
Service Abuse: Box file sharing with credential phishing intent	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Callback Phishing Evasion Social engineering Impersonation: Employee Impersonation: VIP Content analysis Natural Language Understanding Sender analysis Header analysis
Sharepoint link likely unrelated to sender	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML analysis
Spoofing: Hidden Outlook headers in self-addressed forwards	Sublime Security	19d ago Oct 6th, 2026	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Social engineering Header analysis HTML analysis XML analysis Sender analysis Natural Language Understanding
Suspicious attachment with unscannable Cloudflare link	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion PDF Social engineering Impersonation: Employee Impersonation: VIP File analysis URL analysis Sender analysis Content analysis Header analysis Natural Language Understanding
Suspicious request for financial information	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	2mo ago Aug 5th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with charitable donation fraud	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Xero invoice abuse	Sublime Security	10mo ago Dec 17th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Impersonation: Employee Social engineering Natural Language Understanding Content analysis Sender analysis

25 Rules