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 Mar 9th, 2026

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Rule Name & Severity	Author	Last Updated	Labels
Link to auto-download of a suspicious file type (unsolicited)	Sublime Security	1mo ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion LNK Social engineering Archive analysis File analysis Sender analysis URL analysis YARA	/feeds/core/detection-rules/link-to-auto-download-of-a-suspicious-file-type-unsolicited-67ae2152
Link: Tycoon2FA phishing kit (non-exhaustive)	Sublime Security	1mo ago Jan 23rd, 2026	Credential Phishing Free subdomain host Evasion Credential Phishing URL analysis HTML analysis Content analysis	/feeds/core/detection-rules/link-tycoon2fa-phishing-kit-non-exhaustive-a070d4e2
Link: URL fragment with hexadecimal pattern obfuscation	Sublime Security	1mo ago Jan 29th, 2026	Credential Phishing Evasion Content analysis URL analysis	/feeds/core/detection-rules/link-url-fragment-with-hexadecimal-pattern-obfuscation-51f51aa0
Link: URL redirecting to blob URL	Sublime Security	14d ago Feb 24th, 2026	Credential Phishing Malware/Ransomware Evasion Free file host Open redirect Sender analysis URL analysis Threat intelligence	/feeds/core/detection-rules/link-url-redirecting-to-blob-url-1677135b
Link: URL scheme obfuscation via split HTML anchors	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Evasion HTML injection Social engineering Content analysis HTML analysis URL analysis	/feeds/core/detection-rules/link-url-scheme-obfuscation-via-split-html-anchors-10375948
Link: URL shortener with copy-paste instructions and credential theft language	Sublime Security	1mo ago Feb 6th, 2026	Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/link-url-shortener-with-copy-paste-instructions-and-credential-theft-language-a0a2c573
Low reputation link to auto-downloaded HTML file with smuggling indicators	Sublime Security	1mo 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	/feeds/core/detection-rules/low-reputation-link-to-auto-downloaded-html-file-with-smuggling-indicators-339676c6
macOS malware: Compiled AppleScript with document double-extension	Sublime Security	1mo ago Feb 5th, 2026	Malware/Ransomware Evasion Social engineering File analysis Header analysis	/feeds/core/detection-rules/macos-malware-compiled-applescript-with-document-double-extension-9669c169
Malformed URL prefix	Sublime Security	6mo ago Sep 4th, 2025	Credential Phishing Malware/Ransomware Evasion URL analysis	/feeds/core/detection-rules/malformed-url-prefix-4e659d28
MalwareBazaar: Malicious attachment hash in archive (trusted reporters)	Sublime Security	7mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis File analysis Sender analysis Threat intelligence	/feeds/core/detection-rules/malwarebazaar-malicious-attachment-hash-in-archive-trusted-reporters-9d734281
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	/feeds/core/detection-rules/malware-pikabot-delivery-via-url-auto-download-f4be4572
Message traversed multiple onmicrosoft.com tenants	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Free subdomain host Sender analysis Header analysis	/feeds/core/detection-rules/message-traversed-multiple-onmicrosoftcom-tenants-9cf01c0d
Microsoft infrastructure abuse with suspicious patterns	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/microsoft-infrastructure-abuse-with-suspicious-patterns-cfe8e804
Non-RFC compliant calendar files from unsolicited sender	Sublime Security	5mo ago Oct 1st, 2025	Evasion Social engineering Archive analysis Content analysis File analysis Sender analysis	/feeds/core/detection-rules/non-rfc-compliant-calendar-files-from-unsolicited-sender-9859f100
Notion suspicious file share	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Evasion Free file host Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/notion-suspicious-file-share-f7307929
Open redirect: Cartoon Network	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Spam Open redirect Evasion Content analysis URL analysis	/feeds/core/detection-rules/open-redirect-cartoon-network-7435e057
Open redirect: giving.lluh.org	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-givinglluhorg-a2bf1099
Open Redirect: Google domain with /url path and suspicious indicators	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-google-domain-with-url-path-and-suspicious-indicators-fc5adf74
Open redirect: Klaviyo	Sublime Security	2y ago May 14th, 2024	Credential Phishing Spam Evasion Impersonation: Brand Open redirect Social engineering Content analysis URL analysis	/feeds/core/detection-rules/open-redirect-klaviyo-ce5a370a
Open redirect: marketing.edinburghairport.com	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-marketingedinburghairportcom-33a47565
Open redirect: next2.io	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-next2io-5085c422
Open redirect: people.anuneo.com	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-peopleanuneocom-2ae83b73
Open redirect: Shibboleth SSO Logout Return Parameter	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Open redirect Evasion HTML analysis URL analysis Sender analysis	/feeds/core/detection-rules/open-redirect-shibboleth-sso-logout-return-parameter-374b7517
Open redirect: slubnaglowie.pl	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-slubnaglowiepl-2ec356d0
Open redirect: typedrawers.com	Sublime Security	9mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect QR code Social engineering Content analysis File analysis QR code analysis Sender analysis	/feeds/core/detection-rules/open-redirect-typedrawerscom-158d9e95
Open redirect: weblinkconnect.com	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Evasion Open redirect Sender analysis URL analysis	/feeds/core/detection-rules/open-redirect-weblinkconnectcom-967f7a11
Open redirect: Xfinity CMP Redirection to Google AMP	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/open-redirect-xfinity-cmp-redirection-to-google-amp-c0805b80
Outlook hyperlink bypass: left-to-right mark (LRM) in base HTML tag	Sublime Security	2mo ago Dec 10th, 2025	Credential Phishing Evasion Exploit Content analysis HTML analysis URL analysis	/feeds/core/detection-rules/outlook-hyperlink-bypass-left-to-right-mark-lrm-in-base-html-tag-160cc681
PayPal invoice abuse	Sublime Security	27d ago Feb 11th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/paypal-invoice-abuse-0ff7a0d4
PhaaS: Impact Solutions (Impact Vector Suite)	Sublime Security	1mo ago Jan 23rd, 2026	Credential Phishing Evasion Content analysis	/feeds/core/detection-rules/phaas-impact-solutions-impact-vector-suite-4d197faf
Potential prompt injection attack in body HTML	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis	/feeds/core/detection-rules/potential-prompt-injection-attack-in-body-html-5fb24736
Punycode sender domain	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion Lookalike domain Punycode Social engineering Sender analysis	/feeds/core/detection-rules/punycode-sender-domain-bc3d8db5
QR code to auto-download of a suspicious file type (unsolicited)	Sublime Security	4mo ago Oct 17th, 2025	Malware/Ransomware Evasion LNK Social engineering Archive analysis File analysis Sender analysis URL analysis QR code analysis	/feeds/core/detection-rules/qr-code-to-auto-download-of-a-suspicious-file-type-unsolicited-eed87ea2
Reconnaissance: Empty message from uncommon sender	Sublime Security	13d ago Feb 25th, 2026	Spam Evasion Social engineering Content analysis Header analysis	/feeds/core/detection-rules/reconnaissance-empty-message-from-uncommon-sender-b347cdbc
Reconnaissance: Empty subject with mismatched reply-to from new sender	Sublime Security	1mo ago Feb 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis	/feeds/core/detection-rules/reconnaissance-empty-subject-with-mismatched-reply-to-from-new-sender-12f4bd45
Request for Quote or Purchase (RFQ\|RFP) with HTML smuggling attachment	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Content analysis File analysis HTML analysis Javascript analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/request-for-quote-or-purchase-rfqorrfp-with-html-smuggling-attachment-a47a5755
Request for Quote or Purchase (RFQ\|RFP) with suspicious sender or recipient pattern	Sublime Security	19h ago Mar 9th, 2026	BEC/Fraud Evasion Free email provider Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/request-for-quote-or-purchase-rfqorrfp-with-suspicious-sender-or-recipient-pattern-2ac0d329
Salesforce infrastructure abuse	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/salesforce-infrastructure-abuse-78a77c70
Self-sent fake PDF attachment with misleading link	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis URL analysis Sender analysis	/feeds/core/detection-rules/self-sent-fake-pdf-attachment-with-misleading-link-8a285d2e
Sendgrid onmicrosoft.com domain phishing	@ajpc500	1mo ago Jan 12th, 2026	Credential Phishing Evasion Header analysis	/feeds/core/detection-rules/sendgrid-onmicrosoftcom-domain-phishing-271f4ae9
Service abuse: Adobe Creative Cloud share from an unsolicited sender address	Sublime Security	4mo ago Oct 22nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-adobe-creative-cloud-share-from-an-unsolicited-sender-address-47e42ca1
Service abuse: AppSheet infrastructure with suspicious indicators	Sublime Security	5mo ago Oct 6th, 2025	Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis Whois	/feeds/core/detection-rules/service-abuse-appsheet-infrastructure-with-suspicious-indicators-5937646a
Service Abuse: Box file sharing with credential phishing intent	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Callback Phishing Evasion Social engineering Impersonation: Employee Impersonation: VIP Content analysis Natural Language Understanding Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-box-file-sharing-with-credential-phishing-intent-5bd0cb25
Service abuse: Cisco secure email service with financial request	Sublime Security	5mo ago Oct 1st, 2025	BEC/Fraud Impersonation: Brand Social engineering Evasion Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-cisco-secure-email-service-with-financial-request-43a6daa8
Service abuse: DocSend share from an unsolicited reply-to address	Sublime Security	6d ago Mar 4th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docsend-share-from-an-unsolicited-reply-to-address-b377e64c
Service abuse: DocSend share from newly registered domain	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docsend-share-from-newly-registered-domain-3bc152f2
Service abuse: DocuSign notification with suspicious sender or document name	Sublime Security	7mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-docusign-notification-with-suspicious-sender-or-document-name-5e4707cd
Service abuse: DocuSign share from an unsolicited reply-to address	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docusign-share-from-an-unsolicited-reply-to-address-2f12d616
Service abuse: Dropbox share from an unsolicited reply-to address	Sublime Security	7mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-dropbox-share-from-an-unsolicited-reply-to-address-50a1499f
Service abuse: Dropbox share from new domain	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-dropbox-share-from-new-domain-0e664bd9

351 Rules

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