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 Apr 24th, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Link: Non-standard port 8443 in display URL	Sublime Security	29d ago Mar 26th, 2026	Credential Phishing Malware/Ransomware Evasion URL analysis
Link: Obfuscation via userinfo with excessive URL padding	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Impersonation: Brand URL analysis
Link: Obfuscation via userinfo with suspicious indicators	Sublime Security	1mo ago Mar 13th, 2026	Credential Phishing Malware/Ransomware Evasion URL analysis Content analysis
Link: .onion From Unsolicited Sender	Sublime Security	8mo ago Jul 30th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering URL analysis Header analysis Sender analysis
Link: PDF display text with fake copyright claim template	Sublime Security	1mo ago Mar 18th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content PDF Content analysis HTML analysis
Link: PDF filename impersonation with credential theft language	Sublime Security	2mo ago Feb 12th, 2026	Credential Phishing Social engineering Evasion PDF Content analysis Natural Language Understanding Header analysis Sender analysis URL analysis
Link: QR code in EML attachment with credential phishing indicators	Sublime Security	4mo ago Dec 2nd, 2025	Credential Phishing Evasion Open redirect QR code Computer Vision Content analysis File analysis QR code analysis
Link: Recipient email address in 'eta' parameter	Sublime Security	2mo ago Jan 27th, 2026	Credential Phishing Social engineering Evasion URL analysis Content analysis
Link: Referrer anonymization service from untrusted sender	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis
Link: ScreenConnect installer with suspicious relay domain	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Evasion Out of band pivot Social engineering URL analysis File analysis Content analysis
Link: Scribd fullscreen link from suspicious sender	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free file host Social engineering Evasion URL analysis Sender analysis
Link: Secure SharePoint file share from new or unusual sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free file host Evasion Content analysis Sender analysis
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Self-sent message with quarterly document review request	Sublime Security	3mo ago Jan 21st, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Header analysis Sender analysis URL analysis
Link: SharePoint files shared from GoDaddy federated tenants	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Sender analysis URL analysis
Link: SharePoint OneNote or PDF link with self sender behavior	Sublime Security	1mo ago Feb 27th, 2026	Credential Phishing Evasion Free file host OneNote PDF Header analysis URL analysis Sender analysis
Link: Shortened URL with fragment matching subject	Sublime Security	15d ago Apr 9th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering Content analysis URL analysis Header analysis
Link: Single character path with credential theft body and self sender behavior or invalid recipient	Sublime Security	6h ago Apr 24th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis Sender analysis Header analysis
Link: Spam website with evasion indicators	Sublime Security	5mo ago Nov 25th, 2025	Spam Evasion URL analysis URL screenshot Content analysis
Link: Suspicious go.php redirect with document lure	Sublime Security	2mo ago Feb 6th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis
Link: Suspicious SharePoint document name	Sublime Security	1mo ago Mar 17th, 2026	Credential Phishing Free file host Evasion Content analysis
Link: Suspicious Sharepoint folder share	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free file host Evasion HTML analysis Header analysis Sender analysis URL analysis
Link: Suspicious URL with recipient targeting and special characters	Sublime Security	2mo ago Feb 21st, 2026	Credential Phishing Social engineering Evasion URL analysis Content analysis
Link to a domain with punycode characters	@ajpc500	5mo ago Nov 12th, 2025	Credential Phishing Evasion Lookalike domain Punycode Sender analysis URL analysis
Link to auto-downloaded disk image in encrypted zip	@ajpc500	3mo ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link to auto-downloaded DMG in archive	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis File analysis Sender analysis URL analysis
Link to auto-downloaded DMG in encrypted zip	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Encryption Evasion Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link to auto-download of a suspicious file type (unsolicited)	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion LNK Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link: Tycoon2FA phishing kit (non-exhaustive)	Sublime Security	3mo ago Jan 23rd, 2026	Credential Phishing Free subdomain host Evasion Credential Phishing URL analysis HTML analysis Content analysis
Link: Unsolicited email contains link leading to Tycoon URL structure	Sublime Security	1mo ago Mar 10th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis
Link: Unsolicited email contains link to page containing Tycoon URI structure	Sublime Security	1mo ago Mar 10th, 2026	Credential Phishing Evasion Social engineering Sender analysis URL analysis URL screenshot
Link: URL fragment with hexadecimal pattern obfuscation	Sublime Security	2mo ago Jan 29th, 2026	Credential Phishing Evasion Content analysis URL analysis
Link: URL path containing /moni/index	Sublime Security	7h ago Apr 24th, 2026	Credential Phishing Open redirect Evasion URL analysis
Link: URL redirecting to blob URL	Sublime Security	1mo ago Feb 24th, 2026	Credential Phishing Malware/Ransomware Evasion Free file host Open redirect Sender analysis URL analysis Threat intelligence
Link: URL scheme obfuscation via split HTML anchors	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Evasion HTML injection Social engineering Content analysis HTML analysis URL analysis
Link: URL shortener with copy-paste instructions and credential theft language	Sublime Security	2mo ago Feb 6th, 2026	Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis
Link: WordPress admin targeting with recipient identifier in URL fragment	Sublime Security	8d ago Apr 16th, 2026	Credential Phishing Evasion Social engineering URL analysis Content analysis
Low reputation link to auto-downloaded HTML file with smuggling indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Free subdomain host HTML smuggling Impersonation: Brand Open redirect Social engineering Content analysis File analysis HTML analysis Javascript analysis Sender analysis URL analysis
macOS malware: Compiled AppleScript with document double-extension	Sublime Security	2mo ago Feb 5th, 2026	Malware/Ransomware Evasion Social engineering File analysis Header analysis
Malformed URL prefix	Sublime Security	7mo ago Sep 4th, 2025	Credential Phishing Malware/Ransomware Evasion URL analysis
MalwareBazaar: Malicious attachment hash in archive (trusted reporters)	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis File analysis Sender analysis Threat intelligence
Malware: Pikabot delivery via URL auto-download	Sublime Security	2y ago Apr 25th, 2024	Malware/Ransomware Evasion Archive analysis File analysis Threat intelligence URL analysis
Message traversed multiple onmicrosoft.com tenants	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Free subdomain host Sender analysis Header analysis
Microsoft infrastructure abuse with suspicious patterns	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis
Non-RFC compliant calendar files from unsolicited sender	Sublime Security	6mo ago Oct 1st, 2025	Evasion Social engineering Archive analysis Content analysis File analysis Sender analysis
Notion suspicious file share	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Evasion Free file host Content analysis Sender analysis URL analysis
Observed IOC: Malicious domains in body links	Sublime Security	5h ago Apr 24th, 2026	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Observed IOC: Malicious root domains in body links	Sublime Security	5h ago Apr 24th, 2026	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Observed IOC: Malicious URLs in body links	Sublime Security	5h ago Apr 24th, 2026	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Open redirect: Cartoon Network	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Spam Open redirect Evasion Content analysis URL analysis

392 Rules

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