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 25th, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Generic service abuse from newly registered domain	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Evasion Social engineering Header analysis Sender analysis Whois
Google Drive direct download link from unsolicited sender	Sublime Security	1y ago Jul 16th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering Free file host URL analysis Sender analysis Content analysis
Google Notification alert link from non-Google sender	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis Sender analysis URL analysis
Google presentation open redirect phishing	Sublime Security	7mo ago Dec 11th, 2025	Credential Phishing Evasion Open redirect Social engineering URL analysis HTML analysis
Hardbacon infrastructure abuse	Sublime Security	2y ago Dec 20th, 2024	Credential Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis
Headers: Fake in-reply-to with wildcard sender and missing thread context	Sublime Security	6mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis Content analysis
Headers: Invalid recipient domain with mismatched reply-to from new sender	Sublime Security	8mo ago Nov 21st, 2025	BEC/Fraud Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis
Headers: System account impersonation with empty sender address	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Social engineering Spoofing Header analysis Sender analysis Natural Language Understanding
Headers: X-Source-Auth mismatch with mismatched reply-to domain	Sublime Security	2mo ago May 21st, 2026	BEC/Fraud Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Honorific greeting BEC attempt with sender and reply-to mismatch	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
HR impersonation via e-sign agreement comment	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Credential Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
HTML: Bidirectional (BIDI) HTML override with right to left obfuscation	Sublime Security	9mo ago Oct 17th, 2025	BEC/Fraud Credential Phishing Evasion Social engineering Scripting Content analysis HTML analysis
HTML content with print styling and credential theft language	Sublime Security	1mo ago Jun 16th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis Natural Language Understanding
HTML: Template placeholders or recipient email in element class attributes	Sublime Security	26d ago Jun 30th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering HTML analysis Content analysis
Image as content with a link to an open redirect	Sublime Security	2mo ago May 26th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Open redirect Social engineering Content analysis HTML analysis URL analysis
Impersonation: Australian Federal Police with criminal case language	Sublime Security	1mo ago Jun 4th, 2026	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Employee name in subject with suspicious sender	Sublime Security	16d 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	1mo ago May 28th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Sender analysis
Impersonation: Executive using numbered local part	Sublime Security	5mo ago Jan 30th, 2026	BEC/Fraud Free email provider Impersonation: VIP Social engineering Header analysis Sender analysis
Impersonation: Fake product discount promotion	Sublime Security	1mo ago Jun 16th, 2026	BEC/Fraud Social engineering Free file host Content analysis HTML analysis URL analysis
Impersonation: Human Resources with link or attachment and engaging language	Sublime Security	1mo 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	4d 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	19d ago Jul 7th, 2026	Credential Phishing Impersonation: Employee Social engineering Out of band pivot Content analysis
Impersonation: Legal firm with copyright infringement notice	Sublime Security	1mo ago Jun 24th, 2026	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Impersonation: Recipient organization in sender display name with credential theft image	Sublime Security	5mo ago Feb 17th, 2026	Credential Phishing Image as content Impersonation: Brand Social engineering Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Impersonation: Salesforce fake campaign failure notification	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Impersonation: SharePoint reply header anomaly	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Impersonation: Brand Evasion Spoofing Header analysis Content analysis Sender analysis
Impersonation: Suspected supplier impersonation with suspicious content	Sublime Security	2mo ago May 4th, 2026	BEC/Fraud Evasion Free email provider Lookalike domain Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois
Impersonation using recipient domain (untrusted sender)	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Sender analysis
Inbound message from popular service via newly observed distribution list	Sublime Security	11mo ago Aug 5th, 2025	Callback Phishing Evasion Social engineering Header analysis Sender analysis
Investor solicitation with organization targeting	Sublime Security	2mo ago May 8th, 2026	BEC/Fraud Social engineering Content analysis
Invoicera infrastructure abuse	Sublime Security	2y ago Mar 7th, 2024	Credential Phishing Spam Free file host Free subdomain host Image as content Social engineering Content analysis Header analysis Sender analysis
Issuu document with suspicious embedded link	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Free file host Evasion URL analysis URL screenshot Natural Language Understanding Optical Character Recognition
Job scam (unsolicited sender)	Sublime Security	8mo ago Nov 3rd, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Job scam with specific salary pattern	Sublime Security	6mo ago Jan 21st, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Header analysis Sender analysis
Link abuse: Self-service creation platform link with suspicious recipient behavior	Sublime Security	7mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Spam Free email provider Social engineering Header analysis Sender analysis URL analysis
Link: Apple App Store malicious ad manager themed apps from free email provider	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Malware/Ransomware Free email provider Social engineering Evasion Content analysis Sender analysis URL analysis
Link: Base64 encoded recipient address in URL fragment with subject hash	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Encryption Evasion Social engineering Content analysis URL analysis Header analysis
Link: BEC with newly registered domains and financial keywords	Sublime Security	2mo ago May 1st, 2026	BEC/Fraud Social engineering Evasion Spoofing Header analysis Sender analysis URL analysis
Link: Blogspot hosting explicit romance content	Sublime Security	4mo ago Mar 9th, 2026	Spam Free subdomain host Social engineering Natural Language Understanding URL analysis
Link: Breely link masquerading as PDF	Sublime Security	6mo ago Jan 16th, 2026	BEC/Fraud Credential Phishing Free subdomain host Social engineering Content analysis URL analysis
Link: chatbot.page platform abuse	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Social engineering Out of band pivot URL analysis Natural Language Understanding Content analysis HTML analysis Javascript analysis URL screenshot
Link: Concatenated display text concealing duplicate URLs with PDF reference	Sublime Security	1mo ago Jun 12th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis
Link: Credential harvesting with excess padding evasion	Sublime Security	5d ago Jul 21st, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Exif analysis URL screenshot
Link: Credential phishing traversing Russian infrastructure	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Link: Credential phishing via WordPress	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Social engineering Free subdomain host URL analysis Header analysis Computer Vision
Link: Credential theft with Cloudflare tunnel and recipient targeting	Sublime Security	1mo ago Jun 10th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis
Link: Credential theft with invisible Unicode character in page title from unsolicited sender	Sublime Security	5mo ago Feb 13th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding Content analysis HTML analysis URL analysis URL screenshot
Link: Cryptocurrency fraud with suspicious links	Sublime Security	7mo ago Dec 1st, 2025	BEC/Fraud Social engineering Evasion Free subdomain host Scripting Content analysis Header analysis Javascript analysis Natural Language Understanding Sender analysis URL analysis URL screenshot Whois
Link: Direct link to Zoom Docs from non-Zoom sender	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Social engineering Impersonation: Brand Header analysis URL analysis Sender analysis

678 Rules

Page 8 of 14