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 21st, 2026

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GitHub

Rule Name & Severity	Author	Last Updated	Labels
Extortion / sextortion in attachment from untrusted sender	Sublime Security	2mo ago Aug 6th, 2026	Extortion Social engineering Spoofing Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Extortion / sextortion (untrusted sender)	Sublime Security	28d ago Sep 23rd, 2026	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Fake message thread - Untrusted sender with a mismatched freemail reply-to address	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
Fake shipping notification with link to free file hosting	Sublime Security	2y ago Jul 10th, 2024	Spam Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Fake thread with suspicious indicators	Sublime Security	28d ago Sep 23rd, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Fake voicemail notification (untrusted sender)	Sublime Security	15d ago Oct 6th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Fake Zoho Sign template abuse	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Social engineering Content analysis HTML analysis URL analysis
Google share notification with suspicious comments	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Impersonation: VIP Free file host HTML analysis Header analysis Sender analysis Content analysis
HTML: Bidirectional (BIDI) HTML override with right to left obfuscation	Sublime Security	1mo ago Aug 31st, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Scripting Content analysis HTML analysis
HTML content with print styling and credential theft language	Sublime Security	4mo ago Jun 16th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis Natural Language Understanding
HTML smuggling with atob in message body	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware HTML smuggling Content analysis HTML analysis
HTML: Template placeholders or recipient email in element class attributes	Sublime Security	2mo 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	28d ago Sep 23rd, 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	28d ago Sep 23rd, 2026	Credential Phishing Impersonation: Brand Content analysis File analysis 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
Impersonation: SAM/SBA federal registration	Sublime Security	1mo ago Sep 11th, 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	9mo 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: Abused Trac-link URL	Sublime Security	1mo ago Sep 14th, 2026	Credential Phishing Open redirect Evasion PDF URL analysis File analysis Content analysis
Link: Adobe share with suspicious indicators	Sublime Security	9mo 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 Aug 28th, 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	9mo ago Jan 21st, 2026	Credential Phishing Evasion Content analysis URL analysis
Link: Fake forwarded message with suspicious URL in plain text	Sublime Security	3mo 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	3mo ago Jun 25th, 2026	Credential Phishing Evasion Social engineering HTML analysis Content analysis URL analysis
Link: Fake webmail hosting	Sublime Security	1mo ago Sep 9th, 2026	Credential Phishing Social engineering HTML analysis URL analysis
Link: File sharing pretext with suspicious body and link	Sublime Security	1y 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	9mo 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	2mo 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	1y 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	7mo 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	2mo 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	1mo ago Aug 25th, 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	4mo 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	7mo 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	2mo ago Jul 27th, 2026	Credential Phishing Social engineering Impersonation: Brand Content analysis HTML analysis
Link: Suspicious SharePoint document name	Sublime Security	23d ago Sep 28th, 2026	Credential Phishing Free file host Evasion Content analysis
Link: Suspicious single-domain link with suspicious path and financial lure indicators	Sublime Security	3mo 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	2mo 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	9mo 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	28d ago Sep 23rd, 2026	Callback Phishing Free file host Content analysis URL analysis Sender analysis
Microsoft device code phishing	@ajpc500	9mo 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	9mo 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	7d ago Oct 14th, 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	10mo ago Dec 10th, 2025	Credential Phishing Evasion Exploit Content analysis HTML analysis URL analysis
PayPal invoice abuse	Sublime Security	23d ago Sep 28th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Potential prompt injection attack in body HTML	Sublime Security	28d ago Sep 23rd, 2026	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis
Prompt injection: Hidden instructions to an AI in body HTML	Sublime Security	2h ago Oct 21st, 2026	BEC/Fraud Evasion Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis
QR Code with suspicious indicators	Sublime Security	6mo 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

198 Rules

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