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 Aug 24th, 2026

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GitHub

Rule Name & Severity	Author	Last Updated	Labels
HTML: Template placeholders or recipient email in element class attributes	Sublime Security	20d ago Aug 5th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering HTML analysis Content analysis
Image as content with a link to an open redirect	Sublime Security	3mo ago May 26th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Open redirect Social engineering Content analysis HTML analysis URL analysis
Impersonation: Chrome Web Store policy	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Free email provider Lookalike domain Content analysis Header analysis HTML analysis Sender analysis URL analysis
Impersonation: Fake Gmail attachment	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Content analysis File analysis Sender analysis
Impersonation: IT Department mailbox storage alert	Sublime Security	1mo ago Jul 7th, 2026	Credential Phishing Impersonation: Employee Social engineering Out of band pivot Content analysis
Impersonation: SAM/SBA federal registration	Sublime Security	13d ago Aug 12th, 2026	Credential Phishing BEC/Fraud Impersonation: Brand Social engineering Image as content Sender analysis Content analysis HTML analysis Header analysis
Impersonation: SharePoint reply header anomaly	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Social engineering Impersonation: Brand Evasion Spoofing Header analysis Content analysis Sender analysis
Inline image as message with attachment or link	Sublime Security	1y ago Jul 16th, 2025	Credential Phishing Evasion Image as content Content analysis HTML analysis URL analysis
Link: Adobe share with suspicious indicators	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Content analysis URL screenshot Sender analysis Natural Language Understanding URL analysis
Link: Credential harvesting with excess padding evasion	Sublime Security	1mo ago Jul 21st, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Exif analysis URL screenshot
Link: Display text with excessive right-to-left mark characters	Sublime Security	7mo ago Jan 21st, 2026	Credential Phishing Evasion Content analysis URL analysis
Link: Fake forwarded message with suspicious URL in plain text	Sublime Security	1mo ago Jul 20th, 2026	Credential Phishing BEC/Fraud Social engineering Evasion Content analysis Sender analysis URL analysis
Link: Fake secure message notification template	Sublime Security	2mo ago Jun 25th, 2026	Credential Phishing Evasion Social engineering HTML analysis Content analysis URL analysis
Link: File sharing pretext with suspicious body and link	Sublime Security	10mo ago Oct 10th, 2025	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis HTML analysis
Link: Microsoft impersonation using hosted png with suspicious link	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Link: Mismatched Shopify template button href	Sublime Security	5d ago Aug 20th, 2026	Credential Phishing Evasion Social engineering HTML analysis URL analysis Header analysis Sender analysis
Link: PDF and financial display text to free file host	Sublime Security	11mo ago Sep 24th, 2025	Credential Phishing Free file host Free email provider Social engineering Content analysis Sender analysis URL analysis
Link: PDF display text with fake copyright claim template	Sublime Security	5mo ago Mar 18th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content PDF Content analysis HTML analysis
Link: RTL text reversal with recipient email in URL	Sublime Security	5d ago Aug 20th, 2026	Credential Phishing Evasion Social engineering HTML analysis URL analysis
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Self-sent PDF lure with subject correlation	Sublime Security	2mo ago Jun 4th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Header analysis HTML analysis Sender analysis Content analysis
Link: SharePoint OneNote or PDF link with self sender behavior	Sublime Security	5mo ago Feb 27th, 2026	Credential Phishing Evasion Free file host OneNote PDF Header analysis URL analysis Sender analysis
Link: Suspicious HTML structure with subject mirrored in body and single link	Sublime Security	29d ago Jul 27th, 2026	Credential Phishing Social engineering Impersonation: Brand Content analysis HTML analysis
Link: Suspicious SharePoint document name	Sublime Security	5mo ago Mar 17th, 2026	Credential Phishing Free file host Evasion Content analysis
Link: Suspicious single-domain link with suspicious path and financial lure indicators	Sublime Security	1mo ago Jun 26th, 2026	Spam Social engineering Content analysis HTML analysis URL analysis
Link: Uncommon SharePoint document type with sender's display name	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Social engineering OneNote PDF Content analysis Header analysis HTML analysis URL analysis
Link: URL fragmented by hidden spans	Sublime Security	12d ago Aug 13th, 2026	Credential Phishing Evasion Social engineering HTML analysis Content analysis URL analysis
Link: URL scheme obfuscation via split HTML anchors	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Evasion HTML injection Social engineering Content analysis HTML analysis URL analysis
Link: Zoho form link from unsolicited sender	Sublime Security	1y ago Aug 5th, 2025	Callback Phishing Free file host Content analysis URL analysis Sender analysis
Microsoft device code phishing	@ajpc500	7mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis
Open redirect (go2.aspx) leading to Microsoft credential phishing	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Open redirect Content analysis Header analysis URL analysis
Open Redirect: Google domain with /url path and suspicious indicators	Sublime Security	2mo ago Jun 5th, 2026	Credential Phishing Evasion Open redirect Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Outlook hyperlink bypass: left-to-right mark (LRM) in base HTML tag	Sublime Security	8mo ago Dec 10th, 2025	Credential Phishing Evasion Exploit Content analysis HTML analysis URL analysis
PayPal invoice abuse	Sublime Security	2mo ago Jun 4th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Potential prompt injection attack in body HTML	Sublime Security	7mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis
QR Code with suspicious indicators	Sublime Security	4mo ago Apr 22nd, 2026	Credential Phishing QR code Social engineering Content analysis Header analysis Computer Vision Natural Language Understanding QR code analysis Sender analysis URL analysis
Reconnaissance: All recipients cc/bcc'd or undisclosed	Sublime Security	6mo ago Feb 5th, 2026	Reconnaissance Content analysis Header analysis Sender analysis
Reconnaissance: Empty message from uncommon sender	Sublime Security	6mo ago Feb 25th, 2026	Spam Evasion Social engineering Content analysis Header analysis
Reconnaissance: Fake real estate inquiry with empty body	Sublime Security	1mo ago Jul 8th, 2026	BEC/Fraud Social engineering Content analysis Sender analysis
Request for Quote or Purchase (RFQ\|RFP) with suspicious sender or recipient pattern	Sublime Security	11d ago Aug 14th, 2026	BEC/Fraud Evasion Free email provider Content analysis Natural Language Understanding URL analysis
Self-impersonation: Sender matches recipient with bolded name and suspicious link	Sublime Security	2mo ago Jun 16th, 2026	Credential Phishing Evasion Social engineering Header analysis HTML analysis Sender analysis
Self-sent fake PDF attachment with misleading link	Sublime Security	7mo ago Jan 12th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis URL analysis Sender analysis
Service abuse: Adobe Creative Cloud share from an unsolicited sender address	Sublime Security	10mo ago Oct 22nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis
Service abuse: Amazon invitation with suspected callback phishing	Sublime Security	3mo ago May 22nd, 2026	Callback Phishing Out of band pivot Social engineering Content analysis HTML analysis Sender analysis
Service abuse: Apple TestFlight with suspicious developer reference	Sublime Security	6mo ago Feb 6th, 2026	Spam Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis URL analysis
Service abuse: Cognito Forms with short body from unknown sender	Sublime Security	21d ago Aug 4th, 2026	Credential Phishing Social engineering Content analysis Sender analysis URL analysis
Service abuse: Google classroom solicitation	Sublime Security	7mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Service abuse: Google Firebase sender address with suspicious content	Sublime Security	2mo ago Jun 18th, 2026	Spam Credential Phishing Free subdomain host Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis URL analysis Whois
Service abuse: HelloSign from an unsolicited sender address	Sublime Security	1y ago Aug 5th, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis
Service Abuse: HelloSign share with suspicious sender or document name	Sublime Security	2mo ago May 28th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis

182 Rules

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