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

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Credential phishing: DocuSign embedded image lure with no DocuSign domains in links	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/credential-phishing-docusign-embedded-image-lure-with-no-docusign-domains-in-links-dfe8715e
Credential phishing: Email delivery failure impersonation	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/credential-phishing-email-delivery-failure-impersonation-ee318b89
Credential phishing: Engaging language and other indicators (untrusted sender)	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/credential-phishing-engaging-language-and-other-indicators-untrusted-sender-c2bc8ca2
Credential phishing: Engaging language with IPFS link	Sublime Security	2y ago May 3rd, 2024	Credential Phishing Free file host Free subdomain host IPFS Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/credential-phishing-engaging-language-with-ipfs-link-996c4d83
Credential phishing: Fake password expiration from new and unsolicited sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/credential-phishing-fake-password-expiration-from-new-and-unsolicited-sender-5d9c3a75
Credential phishing: Fake storage alerts (unsolicited)	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/credential-phishing-fake-storage-alerts-unsolicited-750f04d6
Credential phishing: Generic document sharing	Sublime Security	24d ago Feb 14th, 2026	Credential Phishing BEC/Fraud Social engineering Evasion Impersonation: Employee Content analysis Natural Language Understanding URL analysis Sender analysis	/feeds/core/detection-rules/credential-phishing-generic-document-sharing-9f0e1d2c
Credential phishing: Hyper-linked image leading to free file host	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Evasion Free file host Image as content Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/credential-phishing-hyper-linked-image-leading-to-free-file-host-f5cb1eca
Credential phishing: Image as content, short or no body contents	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Image as content Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition	/feeds/core/detection-rules/credential-phishing-image-as-content-short-or-no-body-contents-01313f38
Credential phishing language and suspicious indicators (unknown sender)	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/credential-phishing-language-and-suspicious-indicators-unknown-sender-89c186f7
Credential phishing: Onedrive impersonation	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/credential-phishing-onedrive-impersonation-1f990c92
Credential phishing: Re-Authentication lure	Sublime Security	4mo ago Oct 17th, 2025	Credential Phishing Social engineering Impersonation: Brand Natural Language Understanding Content analysis URL analysis Header analysis Sender analysis	/feeds/core/detection-rules/credential-phishing-re-authentication-lure-2e45d3de
Credential phishing: Suspicious e-sign agreement document notification	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis HTML analysis URL analysis Sender analysis	/feeds/core/detection-rules/credential-phishing-suspicious-e-sign-agreement-document-notification-9b68c2d8
Credential Phishing: Suspicious language, link, recipients and other indicators	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/credential-phishing-suspicious-language-link-recipients-and-other-indicators-dcb39190
Credential phishing: Suspicious subject with urgent financial request and link	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/credential-phishing-suspicious-subject-with-urgent-financial-request-and-link-056464f4
Credential phishing: Tax form impersonation with payment request	Sublime Security	25d ago Feb 13th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering PDF Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/credential-phishing-tax-form-impersonation-with-payment-request-717695cf
Credential Phishing via Dropbox comment abuse	Sublime Security	5mo ago Sep 22nd, 2025	Credential Phishing Evasion Out of band pivot Social engineering Content analysis Computer Vision Sender analysis	/feeds/core/detection-rules/credential-phishing-via-dropbox-comment-abuse-744d494d
Credential theft: Gophish abuse with hidden tracking image	Sublime Security	4mo ago Nov 5th, 2025	Spam Evasion Image as content Content analysis HTML analysis	/feeds/core/detection-rules/credential-theft-gophish-abuse-with-hidden-tracking-image-59915ceb
Credential theft with 'safe content' deception and social engineering topics	Sublime Security	13d ago Feb 25th, 2026	Credential Phishing Social engineering Evasion Content analysis Natural Language Understanding	/feeds/core/detection-rules/credential-theft-with-safe-content-deception-and-social-engineering-topics-22ceee0d
CVE-2023-5631 - Roundcube Webmail XSS via crafted SVG	Sublime Security	1mo ago Jan 12th, 2026	Malware/Ransomware Evasion Exploit HTML smuggling Scripting Content analysis HTML analysis Sender analysis	/feeds/core/detection-rules/cve-2023-5631-roundcube-webmail-xss-via-crafted-svg-8405d61b
Cyrillic vowel substitution in subject or display name from unknown sender	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/cyrillic-vowel-substitution-in-subject-or-display-name-from-unknown-sender-74bc0b0c
Cyrillic vowel substitutions with suspicious subject from unknown sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Impersonation: Brand Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/cyrillic-vowel-substitutions-with-suspicious-subject-from-unknown-sender-10251c3c
Deceptive Dropbox mention	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Free file host Free subdomain host Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/deceptive-dropbox-mention-58a107bc
Display Name Emoji with Financial Symbols	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Social engineering Evasion Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/display-name-emoji-with-financial-symbols-f316f335
DocuSign impersonation via CloudHQ links	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing BEC/Fraud Impersonation: Brand Free file host Header analysis URL analysis Content analysis Sender analysis	/feeds/core/detection-rules/docusign-impersonation-via-cloudhq-links-44ba2fee
Domain impersonation: Freemail reply-to local lookalike with financial request	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/domain-impersonation-freemail-reply-to-local-lookalike-with-financial-request-43026a40
EML attachment with credential theft language (unknown sender)	Sublime Security	5mo ago Oct 3rd, 2025	Credential Phishing Evasion Social engineering Natural Language Understanding Sender analysis Content analysis Header analysis	/feeds/core/detection-rules/eml-attachment-with-credential-theft-language-unknown-sender-00e06af1
Employee impersonation: Payroll fraud	Sublime Security	7mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Employee Free email provider Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/employee-impersonation-payroll-fraud-2beb7d85
Employee impersonation with urgent request (untrusted sender)	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/employee-impersonation-with-urgent-request-untrusted-sender-1ce9a146
Extortion / sextortion in attachment from untrusted sender	Sublime Security	7mo ago Aug 5th, 2025	Extortion Social engineering Spoofing Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/extortion-sextortion-in-attachment-from-untrusted-sender-3cb8d32c
Extortion / Sextortion - PDF attachment leveraging breach data from freemail sender	Sublime Security	1y ago Feb 3rd, 2025	BEC/Fraud Free email provider PDF Social engineering QR code Content analysis File analysis QR code analysis	/feeds/core/detection-rules/extortion-sextortion-pdf-attachment-leveraging-breach-data-from-freemail-sender-efb5a213
Extortion / sextortion (untrusted sender)	Sublime Security	1mo ago Jan 22nd, 2026	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/extortion-sextortion-untrusted-sender-265913eb
Fake email quarantine notification	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/fake-email-quarantine-notification-73f26a3d
Fake message thread - Untrusted sender with a mismatched freemail reply-to address	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/fake-message-thread-untrusted-sender-with-a-mismatched-freemail-reply-to-address-ca64e819
Fake message thread with a suspicious link and engaging language from an unknown sender	Sublime Security	3mo ago Nov 12th, 2025	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/fake-message-thread-with-a-suspicious-link-and-engaging-language-from-an-unknown-sender-8fd0e211
Fake request for tax preparation	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Malware/Ransomware Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/fake-request-for-tax-preparation-e36b85b3
Fake scan-to-email message	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Free file host Social engineering Content analysis Optical Character Recognition Sender analysis URL analysis	/feeds/core/detection-rules/fake-scan-to-email-message-78851fbe
Fake shipping notification with link to free file hosting	Sublime Security	2y ago Jul 10th, 2024	Spam Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/fake-shipping-notification-with-link-to-free-file-hosting-6d3fe05e
Fake shipping notification with suspicious language	Sublime Security	2y ago May 3rd, 2024	Credential Phishing Spam Evasion Content analysis Natural Language Understanding	/feeds/core/detection-rules/fake-shipping-notification-with-suspicious-language-67748b0a
Fake thread with suspicious indicators	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/fake-thread-with-suspicious-indicators-c2e18a57
Fake voicemail notification (untrusted sender)	Sublime Security	1mo ago Jan 22nd, 2026	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/fake-voicemail-notification-untrusted-sender-74ba7787
Fake warning banner using confusable characters	Sublime Security	8d ago Mar 2nd, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis	/feeds/core/detection-rules/fake-warning-banner-using-confusable-characters-179ee1ff
Fake Zoho Sign template abuse	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Social engineering Content analysis HTML analysis URL analysis	/feeds/core/detection-rules/fake-zoho-sign-template-abuse-785fd0d5
Fake Zoom meeting invite with suspicious link	Sublime Security	3mo ago Dec 1st, 2025	Credential Phishing Impersonation: Brand Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/fake-zoom-meeting-invite-with-suspicious-link-aba95f23
Fraudulent e-commerce operators	Sublime Security	7mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/fraudulent-e-commerce-operators-3776a6fc
Fraudulent order confirmation/shipping notification from Chinese sender domain	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis Whois	/feeds/core/detection-rules/fraudulent-order-confirmationshipping-notification-from-chinese-sender-domain-4392a14e
Free subdomain link with credential theft indicators	Sublime Security	2y ago Dec 12th, 2024	Credential Phishing Free subdomain host Content analysis Header analysis Natural Language Understanding Optical Character Recognition URL analysis URL screenshot	/feeds/core/detection-rules/free-subdomain-link-with-credential-theft-indicators-9187479c
Google Accelerated Mobile Pages (AMP) abuse	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Impersonation: Brand Open redirect Computer Vision Content analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/google-accelerated-mobile-pages-amp-abuse-46907029
Google Drive direct download link from unsolicited sender	Sublime Security	7mo ago Jul 16th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering Free file host URL analysis Sender analysis Content analysis	/feeds/core/detection-rules/google-drive-direct-download-link-from-unsolicited-sender-78a19343
Google Notification alert link from non-Google sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/google-notification-alert-link-from-non-google-sender-a1c1acfd

478 Rules

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