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 Jul 25th, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Display Name Emoji with Financial Symbols	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Social engineering Evasion Content analysis Header analysis Sender analysis
EML attachment with credential theft language (unknown sender)	Sublime Security	4mo ago Mar 17th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding Sender analysis Content analysis Header analysis
Encrypted Microsoft Office files from untrusted sender	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Encryption Evasion File analysis YARA Sender analysis
Evasion: Hidden content divs from freemail sender	Sublime Security	1mo ago Jun 17th, 2026	Credential Phishing Evasion Free email provider HTML analysis Content analysis Sender analysis
Fake shipping notification with suspicious language	Sublime Security	2y ago May 3rd, 2024	Credential Phishing Spam Evasion Content analysis Natural Language Understanding
Fake thread with suspicious indicators	Sublime Security	1mo ago Jun 17th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Fake warning banner using confusable characters	Sublime Security	4mo ago Mar 2nd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis
Fake Zoho Sign template abuse	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Social engineering Content analysis HTML analysis URL analysis
Fake Zoom meeting invite with suspicious link	Sublime Security	1mo ago Jun 16th, 2026	Credential Phishing Impersonation: Brand Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Generic service abuse from newly registered domain	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Evasion Social engineering Header analysis Sender analysis Whois
Google Drive direct download link from unsolicited sender	Sublime Security	1y ago Jul 16th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering Free file host URL analysis Sender analysis Content analysis
Google presentation open redirect phishing	Sublime Security	7mo ago Dec 11th, 2025	Credential Phishing Evasion Open redirect Social engineering URL analysis HTML analysis
Google services using g.co shortlinks	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion Free email provider Content analysis Header analysis Sender analysis URL analysis
Hardbacon infrastructure abuse	Sublime Security	2y ago Dec 20th, 2024	Credential Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis
Headers: Fake in-reply-to with wildcard sender and missing thread context	Sublime Security	6mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis Content analysis
Headers: Invalid recipient domain with mismatched reply-to from new sender	Sublime Security	8mo ago Nov 21st, 2025	BEC/Fraud Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis
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	8mo ago Nov 6th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Spoofing Header analysis
Headers: risky-recover-production message ID	Sublime Security	4mo ago Feb 26th, 2026	Spam Evasion Header analysis
Headers: Self-sender using Microsoft CompAuth bypass with credential theft content	Sublime Security	2mo ago Apr 27th, 2026	Credential Phishing Spoofing Evasion Natural Language Understanding Header analysis Sender analysis
HR impersonation via e-sign agreement comment	Sublime Security	1mo 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	9mo ago Oct 17th, 2025	BEC/Fraud Credential Phishing Evasion Social engineering Scripting Content analysis HTML analysis
HTML content with print styling and credential theft language	Sublime Security	1mo ago Jun 16th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis HTML analysis Natural Language Understanding
HTML smuggling containing recipient email address	Sublime Security	8mo ago Nov 4th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis File analysis Sender analysis
HTML: Template placeholders or recipient email in element class attributes	Sublime Security	26d ago Jun 30th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering HTML analysis Content analysis
Image as content with a link to an open redirect	Sublime Security	2mo 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	6mo 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	2mo 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	11mo ago Aug 5th, 2025	Callback Phishing Evasion Social engineering Header 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
Issuu document with suspicious embedded link	Sublime Security	6mo 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	5mo ago Jan 30th, 2026	Malware/Ransomware Evasion URL analysis Threat intelligence
Link: Abused Adobe Express	Sublime Security	1y 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	6mo ago Jan 12th, 2026	Credential Phishing Free file host Evasion Content analysis Sender analysis
Link: Adobe share with suspicious indicators	Sublime Security	6mo 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	6mo 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	3mo 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	5mo ago Jan 29th, 2026	Credential Phishing Evasion URL analysis Content analysis
Link: Base64 encoded recipient address in URL fragment with subject hash	Sublime Security	6mo 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	2mo ago May 1st, 2026	BEC/Fraud Social engineering Evasion Spoofing Header analysis Sender analysis URL analysis
Link: Common hidden directory observed	Sublime Security	5mo ago Feb 3rd, 2026	Credential Phishing Evasion URL analysis HTML analysis
Link: Commonly Abused Web Service redirecting to ZIP file	Sublime Security	4mo ago Mar 10th, 2026	Malware/Ransomware Free file host Free subdomain host Open redirect Evasion URL analysis Whois Archive analysis
Link: Concatenated display text concealing duplicate URLs with PDF reference	Sublime Security	1mo ago Jun 12th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis
Link: Credential harvesting with excess padding evasion	Sublime Security	5d ago Jul 21st, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Exif analysis URL screenshot
Link: Credential phishing link with undisclosed recipients	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Evasion Computer Vision Header analysis URL screenshot
Link: Credential theft with Cloudflare tunnel and recipient targeting	Sublime Security	1mo 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	5mo 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	7mo 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	4mo ago Mar 2nd, 2026	Malware/Ransomware Evasion Sender analysis URL analysis

456 Rules

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