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
Headers: System account impersonation with empty sender address	Sublime Security	8mo 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	3mo 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	1mo ago Jul 27th, 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	3mo 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 content with print styling and credential theft language	Sublime Security	2mo ago Jun 16th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis Natural Language Understanding
Impersonation: Australian Federal Police with criminal case language	Sublime Security	3mo ago Jun 4th, 2026	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Human Resources with link or attachment and engaging language	Sublime Security	3mo 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	1mo ago Jul 22nd, 2026	Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Impersonation: Recipient organization in sender display name with credential theft image	Sublime Security	6mo 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	8mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Impersonation: Suspected supplier impersonation with suspicious content	Sublime Security	1mo ago Jul 27th, 2026	BEC/Fraud Evasion Free email provider Lookalike domain Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois
Issuu document with suspicious embedded link	Sublime Security	8mo 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	10mo 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	21d ago Aug 20th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Header analysis Sender analysis
Link: Adobe share with suspicious indicators	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Content analysis URL screenshot Sender analysis Natural Language Understanding URL analysis
Link: Blogspot hosting explicit romance content	Sublime Security	6mo ago Mar 9th, 2026	Spam Free subdomain host Social engineering Natural Language Understanding URL analysis
Link: chatbot.page platform abuse	Sublime Security	1y 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: Credential phishing traversing Russian infrastructure	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Link: Credential phishing with obfuscated JavaScript redirect	Sublime Security	20d ago Aug 21st, 2026	Credential Phishing Open redirect Evasion Scripting Social engineering Natural Language Understanding URL analysis Javascript analysis
Link: Credential theft with Cloudflare tunnel and recipient targeting	Sublime Security	3mo 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	6mo 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	9mo 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: Display text matches subject line	Sublime Security	9mo ago Nov 14th, 2025	BEC/Fraud Credential Phishing Social engineering Evasion Header analysis Content analysis Natural Language Understanding URL analysis
Link: Executable file download with suspicious message content	Sublime Security	10mo ago Oct 16th, 2025	Credential Phishing Malware/Ransomware Evasion Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis Header analysis
Link: Figma design deck with credential theft language	Sublime Security	6mo ago Mar 4th, 2026	Credential Phishing Evasion Free file host Social engineering Natural Language Understanding Computer Vision Optical Character Recognition URL analysis URL screenshot Sender analysis
Link: File sharing impersonation with suspicious language and sending patterns	Sublime Security	4mo ago Apr 30th, 2026	BEC/Fraud Credential Phishing Social engineering Free subdomain host Impersonation: Brand Natural Language Understanding URL analysis Sender analysis Header analysis Content analysis
Link: File sharing pretext with suspicious body and link	Sublime Security	11mo ago Oct 10th, 2025	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis HTML analysis
Link: Financial account issue with suspicious indicators	Sublime Security	5mo ago Mar 24th, 2026	Credential Phishing Free file host Free subdomain host Social engineering Content analysis Natural Language Understanding URL analysis Whois
Link: Fraudulent state business filing notice	Sublime Security	1mo ago Jul 14th, 2026	Credential Phishing Free subdomain host Social engineering Impersonation: Brand Content analysis Natural Language Understanding URL analysis
Link: Free file hosting with undisclosed recipients	Sublime Security	5mo ago Mar 19th, 2026	Credential Phishing Malware/Ransomware Free file host Free subdomain host Evasion Header analysis URL analysis Sender analysis Natural Language Understanding
Link: Free file host links from suspicious support sender with credential theft language	Sublime Security	2mo ago Jun 25th, 2026	Credential Phishing Free file host Social engineering Sender analysis URL analysis Natural Language Understanding
Link: Generic financial document with proceedural timeline template	Sublime Security	2mo ago Jul 10th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Natural Language Understanding Header analysis Sender analysis
Link: Google Forms link with credential theft language	Sublime Security	4mo ago May 11th, 2026	Credential Phishing Social engineering Natural Language Understanding Sender analysis URL analysis
Link: HR impersonation with suspicious domain indicators and credential theft	Sublime Security	9mo ago Dec 3rd, 2025	Credential Phishing Impersonation: Employee Social engineering Lookalike domain Content analysis Natural Language Understanding Computer Vision URL analysis URL screenshot
Link: Intuit link abuse with file share context	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering URL analysis Natural Language Understanding Content analysis Header analysis
Link: Microsoft Dynamics 365 form phishing	Sublime Security	7mo ago Jan 27th, 2026	Credential Phishing Evasion Content analysis File analysis Optical Character Recognition Natural Language Understanding URL analysis URL screenshot
Link: Microsoft impersonation using hosted png with suspicious link	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Link: Mismatched free file host links with document lure	Sublime Security	1mo ago Aug 5th, 2026	BEC/Fraud Credential Phishing Free file host Social engineering Natural Language Understanding URL analysis Content analysis
Link: Multistage Landing - Abused Buildin.ai	Sublime Security	1y ago Sep 5th, 2025	Credential Phishing Free file host Social engineering URL analysis Natural Language Understanding
Link: Multistage landing - FreshDesk knowledge base abuse	Sublime Security	1y ago Aug 21st, 2025	Credential Phishing Open redirect Impersonation: Brand Social engineering Content analysis Natural Language Understanding URL analysis URL screenshot
Link: Multistage landing - Ludus presentation	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Evasion Social engineering Impersonation: Brand Header analysis URL analysis Computer Vision URL screenshot Natural Language Understanding Optical Character Recognition Sender analysis
Link: Multistage landing - Published Google Doc	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Free file host Social engineering Natural Language Understanding URL analysis Whois
Link: Multistage landing - Scribd document	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Impersonation: Brand Free file host URL analysis HTML analysis Natural Language Understanding Computer Vision Optical Character Recognition URL screenshot
Link: MyActiveCampaign Link Abuse	Sublime Security	1y ago Aug 20th, 2025	Credential Phishing Social engineering Natural Language Understanding URL analysis Sender analysis
Link: PDF filename impersonation with credential theft language	Sublime Security	6mo ago Feb 12th, 2026	Credential Phishing Social engineering Evasion PDF Content analysis Natural Language Understanding Header analysis Sender analysis URL analysis
Link: Personal SharePoint with invalid recipients and credential theft language	Sublime Security	7mo ago Jan 23rd, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Link: QR Code with suspicious language (untrusted sender)	Sublime Security	1y ago Jul 30th, 2025	Credential Phishing Impersonation: Brand QR code Social engineering Content analysis Computer Vision Natural Language Understanding QR code analysis Sender analysis URL analysis
Link: Self-sender credential theft with configuration placeholder	Sublime Security	3mo ago May 27th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis Header analysis
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	16d ago Aug 25th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Single character path with credential theft body and self sender behavior or invalid recipient	Sublime Security	4mo ago Apr 24th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis Sender analysis Header analysis

283 Rules

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