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 Jun 8th, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Headers: iOS/iPadOS mailer with invalid build number	Sublime Security	3y ago Aug 17th, 2023	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Header analysis
Headers: Outlook Express mailer	Sublime Security	7mo ago Nov 6th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Spoofing Header analysis
Headers: risky-recover-production message ID	Sublime Security	3mo ago Feb 26th, 2026	Spam Evasion Header analysis
Headers: Self-sender using Microsoft CompAuth bypass with credential theft content	Sublime Security	1mo ago Apr 27th, 2026	Credential Phishing Spoofing Evasion Natural Language Understanding Header analysis Sender analysis
HR impersonation via e-sign agreement comment	Sublime Security	4d 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	7mo ago Oct 17th, 2025	BEC/Fraud Credential Phishing Evasion Social engineering Scripting Content analysis HTML analysis
HTML smuggling containing recipient email address	Sublime Security	7mo ago Nov 4th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis File analysis Sender analysis
Image as content with a link to an open redirect	Sublime Security	14d ago May 26th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Open redirect Social engineering Content analysis HTML analysis URL analysis
Impersonation: SharePoint reply header anomaly	Sublime Security	4mo 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	1mo 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
Inbound message from popular service via newly observed distribution list	Sublime Security	10mo ago Aug 5th, 2025	Callback Phishing Evasion Social engineering Header analysis Sender analysis
Inline image as message with attachment or link	Sublime Security	10mo ago Jul 16th, 2025	Credential Phishing Evasion Image as content Content analysis HTML analysis URL analysis
Issuu document with suspicious embedded link	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing Social engineering Free file host Evasion URL analysis URL screenshot Natural Language Understanding Optical Character Recognition
Link: 9WOLF phishkit initial landing URI	Sublime Security	4mo ago Jan 30th, 2026	Malware/Ransomware Evasion URL analysis Threat intelligence
Link: Abused Adobe Express	Sublime Security	10mo ago Jul 23rd, 2025	Credential Phishing Evasion Free subdomain host Free file host Content analysis Sender analysis URL analysis Whois HTML analysis
Link: Adobe share from unsolicited sender	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing Free file host Evasion Content analysis Sender analysis
Link: Adobe share with suspicious indicators	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Content analysis URL screenshot Sender analysis Natural Language Understanding URL analysis
Link: Apple App Store malicious ad manager themed apps from free email provider	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Malware/Ransomware Free email provider Social engineering Evasion Content analysis Sender analysis URL analysis
Link: Apple TestFlight from suspicious sender	Sublime Security	2mo ago Apr 1st, 2026	Credential Phishing Free email provider Evasion Sender analysis URL analysis
Link: Base64 encoded recipient address in URL fragment with hex subdomain	Sublime Security	4mo ago Jan 29th, 2026	Credential Phishing Evasion URL analysis Content analysis
Link: Base64 encoded recipient address in URL fragment with subject hash	Sublime Security	4mo 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	1mo ago May 1st, 2026	BEC/Fraud Social engineering Evasion Spoofing Header analysis Sender analysis URL analysis
Link: Common hidden directory observed	Sublime Security	4mo ago Feb 3rd, 2026	Credential Phishing Evasion URL analysis HTML analysis
Link: Commonly Abused Web Service redirecting to ZIP file	Sublime Security	3mo ago Mar 10th, 2026	Malware/Ransomware Free file host Free subdomain host Open redirect Evasion URL analysis Whois Archive analysis
Link: Credential harvesting with excess padding evasion	Sublime Security	1mo ago May 4th, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Exif analysis URL screenshot
Link: Credential phishing link with undisclosed recipients	Sublime Security	10mo ago Aug 5th, 2025	Credential Phishing Evasion Computer Vision Header analysis URL screenshot
Link: Credential theft with invisible Unicode character in page title from unsolicited sender	Sublime Security	3mo 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	6mo 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: CVE-2024-21413 Microsoft Outlook Remote Code Execution Vulnerability	Sublime Security	2y ago Feb 15th, 2024	Malware/Ransomware Evasion Exploit URL analysis
Link: Direct download of executable file	Sublime Security	3mo ago Mar 2nd, 2026	Malware/Ransomware Evasion Sender analysis URL analysis
Link: Direct link to gamma.app document with mode parameter	Sublime Security	10mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free file host Evasion URL analysis
Link: Direct link to keap.app contact-us page	Sublime Security	10mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free file host Evasion URL analysis
Link: Direct MSI download from low reputation domain	Sublime Security	3mo ago Feb 19th, 2026	Malware/Ransomware Evasion Sender analysis URL analysis
Link: Display text matches subject line	Sublime Security	6mo ago Nov 14th, 2025	BEC/Fraud Credential Phishing Social engineering Evasion Header analysis Content analysis Natural Language Understanding URL analysis
Link: Display text with excessive right-to-left mark characters	Sublime Security	4mo ago Jan 21st, 2026	Credential Phishing Evasion Content analysis URL analysis
Link: Excessive URL rewrite encoders	Sublime Security	4mo ago Jan 21st, 2026	Credential Phishing Malware/Ransomware Encryption Evasion URL analysis Content analysis
Link: Executable file download with suspicious message content	Sublime Security	7mo 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	3mo 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 pretext with suspicious body and link	Sublime Security	8mo ago Oct 10th, 2025	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis HTML analysis
Link: Flagged bit.ly link	Sublime Security	10mo ago Jul 16th, 2025	Credential Phishing Evasion URL analysis
Link: Free file hosting with undisclosed recipients	Sublime Security	2mo 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: Google Cloud Storage with suspicious URL pattern	Sublime Security	14d ago May 26th, 2026	Credential Phishing Free file host Evasion URL analysis
Link: Google Firebase dynamic link that redirects to new domain (<7 days old)	@ajpc500	4mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion URL analysis Whois
Link: GoPhish query param values	Sublime Security	5mo ago Jan 5th, 2026	Credential Phishing Malware/Ransomware Evasion URL analysis
Link: Hotel booking spoofed display URL	Sublime Security	3mo ago Feb 17th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering URL analysis Sender analysis
Link: HTML file with suspicious binary fragment ending pattern	Sublime Security	4mo ago Jan 29th, 2026	Credential Phishing Evasion URL analysis
Link: IPv4-mapped IPv6 address obfuscation	Sublime Security	2mo ago Mar 17th, 2026	Credential Phishing Malware/Ransomware Evasion Content analysis URL analysis
Link: JavaScript obfuscation with Telegram bot integration	Sublime Security	3mo ago Feb 25th, 2026	Credential Phishing Evasion Scripting Content analysis Javascript analysis URL analysis
Link: Landing page with search-ms protocol redirect	Sublime Security	2mo ago Apr 7th, 2026	Malware/Ransomware Evasion Scripting URL analysis Threat intelligence
Link: Mamba 2FA phishing kit	Sublime Security	4mo ago Jan 28th, 2026	Credential Phishing Evasion Social engineering URL analysis

414 Rules

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