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 Jan 23rd, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Business Email Compromise (BEC) attempt from untrusted sender	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/business-email-compromise-bec-attempt-from-untrusted-sender-96d4c35a
Business Email Compromise (BEC) attempt from untrusted sender (French/Français)	Sublime Security	6mo ago Jul 16th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/business-email-compromise-bec-attempt-from-untrusted-sender-frenchfrancais-b7d1e096
Business Email Compromise (BEC) attempt with masked recipients and reply-to mismatch (unsolicited)	Sublime Security	6mo ago Jul 16th, 2025	BEC/Fraud Evasion Free email provider Header analysis Sender analysis	/feeds/core/detection-rules/business-email-compromise-bec-attempt-with-masked-recipients-and-reply-to-mismatch-unsolicited-682191bf
Business Email Compromise (BEC) with request for mobile number	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/business-email-compromise-bec-with-request-for-mobile-number-514ffd68
Business Email Compromise: Request for mobile number via reply thread hijacking	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/business-email-compromise-request-for-mobile-number-via-reply-thread-hijacking-0282f346
Callback phishing: AOL senders with suspicious HTML template or PDF attachment	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Free email provider Social engineering Content analysis Header analysis File analysis HTML analysis Exif analysis Sender analysis	/feeds/core/detection-rules/callback-phishing-aol-senders-with-suspicious-html-template-or-pdf-attachment-f6044eed
Callback phishing in body or attachment (untrusted sender)	Sublime Security	2d ago Jan 22nd, 2026	Callback Phishing Out of band pivot Social engineering Content analysis File analysis Optical Character Recognition Natural Language Understanding Sender analysis	/feeds/core/detection-rules/callback-phishing-in-body-or-attachment-untrusted-sender-b93c6f94
Callback phishing: Social Security Administration fraud	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis	/feeds/core/detection-rules/callback-phishing-social-security-administration-fraud-a9049d52
Callback phishing solicitation in message body	Sublime Security	3mo ago Oct 17th, 2025	Callback Phishing Free email provider Impersonation: Brand Out of band pivot Social engineering File analysis Sender analysis	/feeds/core/detection-rules/callback-phishing-solicitation-in-message-body-10a3a446
Callback phishing: SumUp infrastructure abuse	Sublime Security	4mo ago Sep 5th, 2025	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/callback-phishing-sumup-infrastructure-abuse-1c41649e
Callback phishing via Adobe Sign comment	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Computer Vision Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/callback-phishing-via-adobe-sign-comment-7eb4516d
Callback phishing via calendar invite	Sublime Security	2d ago Jan 22nd, 2026	Callback Phishing Social engineering Evasion File analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/callback-phishing-via-calendar-invite-95c84360
Callback phishing via DocuSign comment	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Evasion Impersonation: Brand Out of band pivot Social engineering Content analysis Computer Vision Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/callback-phishing-via-docusign-comment-48aec918
Callback phishing via extensionless rfc822 attachment	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Impersonation: Brand Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/callback-phishing-via-extensionless-rfc822-attachment-197722c4
Callback phishing via Google Group abuse	Sublime Security	6mo ago Jul 16th, 2025	Callback Phishing Free email provider Impersonation: Brand Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/callback-phishing-via-google-group-abuse-199d873b
Callback phishing via Microsoft comment	Sublime Security	1mo ago Dec 16th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/callback-phishing-via-microsoft-comment-8346c7b9
Callback Phishing via Signable E-Signature Request	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Exploit Impersonation: Brand Out of band pivot Social engineering Computer Vision Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/callback-phishing-via-signable-e-signature-request-4599575d
Callback phishing via SignFree e-signature request	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Exploit Impersonation: Brand Out of band pivot Social engineering Computer Vision Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/callback-phishing-via-signfree-e-signature-request-21381c37
Callback phishing via Xodo Sign comment	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Exploit Impersonation: Brand Out of band pivot Social engineering Computer Vision Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/callback-phishing-via-xodo-sign-comment-6f722c5d
Callback phishing via Zelle Service Abuse	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/callback-phishing-via-zelle-service-abuse-08727484
Callback Phishing via Zoom comment	Sublime Security	4mo ago Sep 22nd, 2025	Callback Phishing Out of band pivot Social engineering Impersonation: Brand Computer Vision Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/callback-phishing-via-zoom-comment-8ec30881
Callback scam: Impersonation via TimeTrade infrastructure	Sublime Security	5mo ago Aug 20th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Sender analysis Header analysis	/feeds/core/detection-rules/callback-scam-impersonation-via-timetrade-infrastructure-0c0b3664
Canva design with suspicious embedded link	Sublime Security	3mo ago Sep 29th, 2025	Credential Phishing Evasion Social engineering Free file host HTML analysis URL analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/canva-design-with-suspicious-embedded-link-02959e22
Canva infrastructure abuse	Sublime Security	4mo ago Sep 5th, 2025	BEC/Fraud Callback Phishing Social engineering Impersonation: Brand Impersonation: Employee Free email provider Natural Language Understanding Sender analysis Content analysis	/feeds/core/detection-rules/canva-infrastructure-abuse-b69fdb5c
Catbox.moe link from untrusted source	Sublime Security	5mo ago Aug 5th, 2025	Malware/Ransomware Free file host Social engineering Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/catboxmoe-link-from-untrusted-source-d6041a8b
ClickFunnels link infrastructure abuse	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Free email provider Free subdomain host Social engineering Content analysis Header analysis QR code analysis Sender analysis URL analysis	/feeds/core/detection-rules/clickfunnels-link-infrastructure-abuse-9192fbe9
Cloud storage impersonation with credential theft indicators	Sublime Security	4mo ago Sep 22nd, 2025	Credential Phishing Free file host Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis	/feeds/core/detection-rules/cloud-storage-impersonation-with-credential-theft-indicators-4c20f72c
Commonly abused sender TLD with engaging language	Sublime Security	5mo ago Aug 7th, 2025	Credential Phishing Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis	/feeds/core/detection-rules/commonly-abused-sender-tld-with-engaging-language-447386dc
Constant Contact link infrastructure abuse	Sublime Security	3mo ago Oct 17th, 2025	Credential Phishing Free email provider Open redirect Social engineering Content analysis Header analysis QR code analysis Sender analysis	/feeds/core/detection-rules/constant-contact-link-infrastructure-abuse-8c5e8e4c
COVID-19 themed fraud with sender and reply-to mismatch or compensation award	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/covid-19-themed-fraud-with-sender-and-reply-to-mismatch-or-compensation-award-a16480ef
Credential phishing content and link (untrusted sender)	Sublime Security	1mo ago Dec 17th, 2025	Credential Phishing Social engineering Computer Vision Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/credential-phishing-content-and-link-untrusted-sender-f0c95bb7
Credential phishing: DocuSign embedded image lure with no DocuSign domains in links	Sublime Security	12d 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	6mo 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	12d 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: Fake password expiration from new and unsolicited sender	Sublime Security	12d 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	12d 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	1mo ago Dec 8th, 2025	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	5mo 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 language and suspicious indicators (unknown sender)	Sublime Security	6mo 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 link (unknown sender)	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Social engineering Computer Vision Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/credential-phishing-link-unknown-sender-a278012b
Credential phishing: Re-Authentication lure	Sublime Security	3mo 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: 'Secure message' and engaging language	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Natural Language Understanding Sender analysis	/feeds/core/detection-rules/credential-phishing-secure-message-and-engaging-language-bd95a7b1
Credential phishing: Suspicious e-sign agreement document notification	Sublime Security	12d 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	6mo 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	12d 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	4mo ago Sep 10th, 2025	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	4mo 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
CVE-2023-5631 - Roundcube Webmail XSS via crafted SVG	Sublime Security	12d 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	6mo 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	12d 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

594 Rules

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