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

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: Small text file with link containing recipient email address	Sublime Security	3mo ago May 14th, 2026	Credential Phishing Evasion Social engineering File analysis URL analysis
Attachment: Suspicious employee policy update document lure	Sublime Security	8mo ago Dec 26th, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Suspicious PDF created with headless browser	Sublime Security	2mo ago Jul 1st, 2026	Credential Phishing Evasion PDF Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: SVG files with evasion elements	Sublime Security	4mo ago May 8th, 2026	Malware/Ransomware Credential Phishing QR code Image as content Evasion File analysis XML analysis QR code analysis Sender analysis
Attachment: SVG file with HTML entity encoded href attributes	Sublime Security	3mo ago May 20th, 2026	Malware/Ransomware Credential Phishing Evasion HTML smuggling File analysis Content analysis
Attachment: SVG file with hyperlinks and cursor styling	Sublime Security	3mo ago May 20th, 2026	Credential Phishing Evasion Image as content File analysis XML analysis Content analysis
Attachment: TAR file with RAR type	Sublime Security	4mo ago Apr 24th, 2026	Malware/Ransomware Evasion Archive analysis File analysis
Attachment: Web files with suspicious comments	Sublime Security	1y ago Aug 8th, 2025	Credential Phishing Malware/Ransomware HTML smuggling Evasion File analysis HTML analysis Content analysis
Attachment: WinRAR CVE-2025-8088 exploitation	Sublime Security	8mo ago Jan 12th, 2026	Malware/Ransomware Exploit Evasion Archive analysis File analysis YARA
Attachment with encrypted zip (unsolicited)	Sublime Security	1y ago Jul 16th, 2025	Malware/Ransomware Evasion Encryption Archive analysis File analysis Sender analysis
Attachment with macro calling executable	Sublime Security	8mo ago Jan 12th, 2026	Malware/Ransomware Evasion Macros Archive analysis File analysis
Attachment with unscannable encrypted zip	Sublime Security	4mo ago Apr 30th, 2026	Malware/Ransomware Encryption Evasion Archive analysis File analysis YARA
Attachment: Word document with hyperlink and fraud language	Sublime Security	6d ago Sep 4th, 2026	Credential Phishing BEC/Fraud Free email provider Social engineering Evasion File analysis XML analysis HTML analysis URL analysis Natural Language Understanding Sender analysis
Attachment: XLSX file with suspicious print titles metadata	Sublime Security	11mo ago Sep 16th, 2025	Credential Phishing Evasion Macros File analysis Exif analysis
Attachment: ZIP containing Office binary with embedded DLL	Sublime Security	17d ago Aug 24th, 2026	Malware/Ransomware Evasion Archive analysis File analysis YARA
Attachment: ZIP filename mismatch	Sublime Security	10d ago Aug 31st, 2026	Malware/Ransomware Evasion Archive analysis YARA File analysis
Attachment: ZIP file with CVE-2026-0866 exploit	Sublime Security	5mo ago Mar 20th, 2026	Malware/Ransomware Exploit Evasion Archive analysis File analysis YARA
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply	Sublime Security	6mo ago Mar 11th, 2026	BEC/Fraud Social engineering Evasion Content analysis Header analysis Sender analysis
BEC with unusual reply-to or return-path mismatch	Sublime Security	3mo ago Jun 5th, 2026	BEC/Fraud Evasion Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Benefits enrollment impersonation	Sublime Security	3mo ago Jun 5th, 2026	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Body: CSS clamp() font obfuscation	Sublime Security	9d ago Sep 1st, 2026	Credential Phishing Evasion Social engineering HTML analysis URL analysis Content analysis
Body: CSS Hidden text via clip-path	Sublime Security	1mo ago Aug 5th, 2026	Spam Credential Phishing Evasion HTML analysis Content analysis
Body: CSS Hidden text via table-column	Sublime Security	7d ago Sep 3rd, 2026	Credential Phishing Spam Evasion HTML analysis Content analysis
Body: CSS zero-value calc() obfuscation	Sublime Security	1mo ago Aug 5th, 2026	Credential Phishing Spam Evasion HTML analysis
Body: CVE-2026-42897 Exchange OWA stored XSS	Sublime Security	13h ago Sep 9th, 2026	Malware/Ransomware Evasion Exploit Scripting Content analysis HTML analysis
Body: Embedded email headers indicative of thread hijacking/abuse	Sublime Security	9mo ago Dec 1st, 2025	Credential Phishing BEC/Fraud Spam Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis
Body: Fake secure email portal with HTML obfuscation	Sublime Security	2mo ago Jun 18th, 2026	Credential Phishing Evasion Social engineering Spoofing Content analysis HTML analysis URL analysis Sender analysis Threat intelligence
Body HTML: Comment with 24-character hex token	Sublime Security	9d ago Sep 1st, 2026	Spam Evasion Content analysis HTML analysis
Body HTML: Recipient SLD in HTML class	Sublime Security	11mo ago Sep 23rd, 2025	Credential Phishing Evasion Social engineering HTML analysis Header analysis Sender analysis
Body: HTML whitespace stuffing with short initial message	Sublime Security	13d ago Aug 28th, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Body: Invisible Unicode obfuscation student loan callback phishing	Sublime Security	2mo ago Jun 25th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering HTML analysis Content analysis
Body: Suspicious date format	Sublime Security	4mo ago Apr 22nd, 2026	Credential Phishing Evasion Spoofing Social engineering Content analysis
Body: Suspicious table template fingerprint	Sublime Security	2mo ago Jun 25th, 2026	Credential Phishing Social engineering Evasion HTML analysis Content analysis
Body: Yellow highlighted text markers	Sublime Security	1mo ago Jul 28th, 2026	Credential Phishing BEC/Fraud Evasion HTML analysis Content analysis
Brand impersonation: Coinbase with suspicious links	Sublime Security	11mo ago Sep 22nd, 2025	Credential Phishing Evasion Free subdomain host Image as content Impersonation: Brand Computer Vision Content analysis File analysis URL analysis
Brand impersonation: DocuSign with embedded QR code	Sublime Security	4mo ago May 4th, 2026	Credential Phishing Evasion Image as content Impersonation: Brand QR code Computer Vision Content analysis QR code analysis Sender analysis
Brand impersonation: File sharing notification with template artifacts	Sublime Security	7mo ago Jan 23rd, 2026	Credential Phishing Impersonation: Brand Social engineering Evasion HTML analysis Computer Vision Content analysis Header analysis
Brand impersonation: Microsoft logo in HTML with fake quarantine release notification	Sublime Security	9mo ago Dec 10th, 2025	Credential Phishing Evasion Impersonation: Brand Social engineering Content analysis HTML analysis Sender analysis
Brand impersonation: Microsoft Planner with suspicious link	Sublime Security	29d ago Aug 12th, 2026	Credential Phishing Evasion Image as content Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Brand impersonation: QuickBooks notification from Intuit themed company name	Sublime Security	8mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis
Brand Impersonation: ShareFile	Sublime Security	2d ago Sep 8th, 2026	Credential Phishing Impersonation: Brand Evasion Lookalike domain Header analysis Content analysis Sender analysis
Brand impersonation: SharePoint PDF attachment with credential theft language	Sublime Security	4mo ago May 4th, 2026	Credential Phishing Impersonation: Brand Social engineering PDF Evasion Computer Vision File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis Header analysis Whois
Brand impersonation: Stripe notification	Sublime Security	11mo ago Sep 26th, 2025	Credential Phishing Evasion Impersonation: Brand Social engineering Content analysis Header analysis URL analysis Whois
Brand impersonation: Zoom	Sublime Security	3mo ago Jun 5th, 2026	Credential Phishing Impersonation: Brand Social engineering Evasion Computer Vision Content analysis HTML analysis Natural Language Understanding URL analysis
Business Email Compromise (BEC) attempt with masked recipients and reply-to mismatch (unsolicited)	Sublime Security	1y ago Jul 16th, 2025	BEC/Fraud Evasion Free email provider Header analysis Sender analysis
Callback phishing: Social Security Administration fraud	Sublime Security	8mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis
Callback phishing: SumUp infrastructure abuse	Sublime Security	4mo ago May 4th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Callback phishing via Adobe Sign comment	Sublime Security	4mo ago May 4th, 2026	Callback Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Computer Vision Header analysis Sender analysis URL analysis
Callback phishing via calendar invite	Sublime Security	1mo ago Aug 7th, 2026	Callback Phishing Social engineering Evasion ICS Phishing File analysis Header analysis Natural Language Understanding Sender analysis
Callback phishing via DocuSign comment	Sublime Security	8mo ago Jan 12th, 2026	Callback Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Computer Vision Header analysis Sender analysis URL analysis

504 Rules

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