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

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: Roomsy with unrelated body content	Sublime Security	3mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis Natural Language Understanding	/feeds/core/detection-rules/service-abuse-roomsy-with-unrelated-body-content-18e08a5a
Service abuse: Sendgrid credential theft with personalized request targeting single recipient	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis Content analysis	/feeds/core/detection-rules/service-abuse-sendgrid-credential-theft-with-personalized-request-targeting-single-recipient-b9680da1
Service abuse: SendGrid-formatted link with actor-controlled fragment	Sublime Security	3mo ago Nov 24th, 2025	Credential Phishing Evasion Social engineering Content analysis URL analysis	/feeds/core/detection-rules/service-abuse-sendgrid-formatted-link-with-actor-controlled-fragment-cb511fe9
Service abuse: SendGrid impersonation via Sendgrid from new sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-sendgrid-impersonation-via-sendgrid-from-new-sender-aa5d18ca
Service abuse: SendThisFile with credential theft and financial language	Sublime Security	4mo ago Oct 27th, 2025	BEC/Fraud Credential Phishing Free file host Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-sendthisfile-with-credential-theft-and-financial-language-c1ebf25b
Service abuse: SurveyMonkey survey from newly registered domain	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-surveymonkey-survey-from-newly-registered-domain-50a85fa7
Service abuse: Suspicious Zoom Docs link	Sublime Security	3mo ago Dec 2nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-suspicious-zoom-docs-link-064b2594
Service abuse: Task management message sent via SendGrid	Sublime Security	5mo ago Oct 6th, 2025	Credential Phishing Impersonation: Brand Social engineering Evasion Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-task-management-message-sent-via-sendgrid-568a63f5
Service abuse: Trello board invitation with VIP impersonation	Sublime Security	1mo ago Feb 3rd, 2026	Credential Phishing Impersonation: VIP Social engineering Content analysis Header analysis HTML analysis Sender analysis	/feeds/core/detection-rules/service-abuse-trello-board-invitation-with-vip-impersonation-fedfc94b
Service abuse: Vimeo with external plain-text links in message	Sublime Security	4d ago Mar 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Sender analysis Content analysis URL analysis	/feeds/core/detection-rules/service-abuse-vimeo-with-external-plain-text-links-in-message-ba94ae6b
Service abuse: WeTransfer callback scam	Sublime Security	1mo ago Jan 30th, 2026	Callback Phishing Social engineering Out of band pivot Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-wetransfer-callback-scam-c60c8650
Sharepoint link likely unrelated to sender	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML analysis	/feeds/core/detection-rules/sharepoint-link-likely-unrelated-to-sender-6870f489
SharePoint OTP for filename matching org name	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis	/feeds/core/detection-rules/sharepoint-otp-for-filename-matching-org-name-89911cbd
Shopify infrastructure abuse	Sublime Security	2y ago Nov 13th, 2024	Credential Phishing Spam Evasion Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis URL analysis	/feeds/core/detection-rules/shopify-infrastructure-abuse-844ff164
Spam: BlackBaud infrastructure abuse	Sublime Security	2y ago Jan 17th, 2024	Spam Evasion Impersonation: Brand Image as content Social engineering Content analysis Header analysis	/feeds/core/detection-rules/spam-blackbaud-infrastructure-abuse-3db46591
Spam: Commonly observed formatting of unauthorized free giveaways	Sublime Security	1mo ago Jan 14th, 2026	Spam Impersonation: Brand Social engineering Content analysis HTML analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-commonly-observed-formatting-of-unauthorized-free-giveaways-8bc49fa3
Spam: Cryptocurrency airdrop/giveaway	Sublime Security	4mo ago Oct 16th, 2025	Spam Social engineering Impersonation: Brand Content analysis	/feeds/core/detection-rules/spam-cryptocurrency-airdropgiveaway-80a2e2fd
Spam: Default Microsoft Exchange Online sender domain (onmicrosoft.com)	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Spam Free email provider Impersonation: Brand Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/spam-default-microsoft-exchange-online-sender-domain-onmicrosoftcom-3f2a64ce
Spam: Fake dating profile notification	Sublime Security	3mo ago Dec 3rd, 2025	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/spam-fake-dating-profile-notification-0f33fea2
Spam: Fake photo share	Sublime Security	4mo ago Nov 8th, 2025	Spam Evasion Social engineering Content analysis Sender analysis URL analysis Whois	/feeds/core/detection-rules/spam-fake-photo-share-eb086f7d
Spam: Firebase password reset from suspicious sender	Sublime Security	3mo ago Dec 2nd, 2025	Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-firebase-password-reset-from-suspicious-sender-a2f673a9
Spam/fraud: Predatory journal/research paper request	Sublime Security	4mo ago Nov 3rd, 2025	BEC/Fraud Spam Social engineering Impersonation: Brand Lookalike domain Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Whois	/feeds/core/detection-rules/spamfraud-predatory-journalresearch-paper-request-263ca56b
Spam: Ghostwriting services scam with manipulative language	Sublime Security	4mo ago Oct 17th, 2025	Spam Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/spam-ghostwriting-services-scam-with-manipulative-language-b747c3ea
Spam: Mastercard promotional content with image-based body	Sublime Security	4mo ago Nov 5th, 2025	Credential Phishing Spam Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/spam-mastercard-promotional-content-with-image-based-body-5f2cb559
Spam: Personalized subject and greetings via Salesforce Marketing Cloud	Sublime Security	4mo ago Nov 3rd, 2025	Spam Social engineering Content analysis Header analysis	/feeds/core/detection-rules/spam-personalized-subject-and-greetings-via-salesforce-marketing-cloud-c77f127f
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	14d ago Feb 24th, 2026	Spam Evasion Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/spam-sendersrvcom-with-financial-communications-and-unsubscribe-language-69570820
Spam: Sexually explicit Google Drive share	Sublime Security	7mo ago Aug 5th, 2025	Spam Social engineering Free email provider Content analysis Sender analysis	/feeds/core/detection-rules/spam-sexually-explicit-google-drive-share-3f951c06
Spam: Sexually explicit Google group invitation	Sublime Security	3mo ago Nov 12th, 2025	Spam Free email provider Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/spam-sexually-explicit-google-group-invitation-4e0bec29
Spam: Sexually explicit Looker Studio report	Sublime Security	5mo ago Oct 2nd, 2025	Spam Social engineering Free email provider Content analysis Sender analysis	/feeds/core/detection-rules/spam-sexually-explicit-looker-studio-report-f1e649cd
Spam: Single recipient duplicated in cc	Sublime Security	1mo ago Jan 12th, 2026	Spam Impersonation: Brand Social engineering Header analysis Content analysis URL analysis Sender analysis	/feeds/core/detection-rules/spam-single-recipient-duplicated-in-cc-387cacc9
Spam: Unsolicited WordPress account creation or password reset request	Sublime Security	3mo ago Nov 24th, 2025	Spam Social engineering Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-unsolicited-wordpress-account-creation-or-password-reset-request-e182b6b2
Spoofable internal domain with suspicious signals	Sublime Security	7mo ago Jul 23rd, 2025	Credential Phishing Free file host Free subdomain host Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/spoofable-internal-domain-with-suspicious-signals-40089d69
Subject and sender display name contains matching long alphanumeric string	Sublime Security	1mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/subject-and-sender-display-name-contains-matching-long-alphanumeric-string-a8a0c831
Suspected lookalike domain with suspicious language	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Evasion Lookalike domain Social engineering Content analysis Natural Language Understanding Sender analysis Whois	/feeds/core/detection-rules/suspected-lookalike-domain-with-suspicious-language-3674ced0
Suspected WordPress abuse with cross-site scripting (XSS) indicators	Sublime Security	7mo ago Aug 5th, 2025	Malware/Ransomware Credential Phishing Scripting Impersonation: Brand Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/suspected-wordpress-abuse-with-cross-site-scripting-xss-indicators-9c21225b
Suspicious attachment with unscannable Cloudflare link	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion PDF Social engineering Impersonation: Employee Impersonation: VIP File analysis URL analysis Sender analysis Content analysis Header analysis Natural Language Understanding	/feeds/core/detection-rules/suspicious-attachment-with-unscannable-cloudflare-link-00f92b6f
Suspicious display name: Gmail sender with engaging language	Sublime Security	4d ago Mar 6th, 2026	BEC/Fraud Credential Phishing Social engineering Sender analysis	/feeds/core/detection-rules/suspicious-display-name-gmail-sender-with-engaging-language-82ca0ff1
Suspicious DocuSign share from new domain	Sublime Security	7mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/suspicious-docusign-share-from-new-domain-d430a1f3
Suspicious invoice reference with missing or image-only attachments	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Computer Vision File analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/suspicious-invoice-reference-with-missing-or-image-only-attachments-466c1680
Suspicious link to Looker Studio (lookerstudio.google.com) from a new and unsolicited sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/suspicious-link-to-looker-studio-lookerstudiogooglecom-from-a-new-and-unsolicited-sender-dbb50cb4
Suspicious mailer received from Gmail servers	Sublime Security	7mo ago Jul 16th, 2025	Callback Phishing Spam Free email provider Social engineering Header analysis	/feeds/core/detection-rules/suspicious-mailer-received-from-gmail-servers-f05f04ee
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois	/feeds/core/detection-rules/suspicious-newly-registered-reply-to-domain-with-engaging-financial-or-urgent-language-db4d9bb3
Suspicious recipient pattern and language with low reputation link to login	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/suspicious-recipient-pattern-and-language-with-low-reputation-link-to-login-a8ea0402
Suspicious request for financial information	Sublime Security	3mo ago Dec 6th, 2025	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/suspicious-request-for-financial-information-4ebdaa4d
Tax Form: W-8BEN solicitation	Sublime Security	15d ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis URL analysis	/feeds/core/detection-rules/tax-form-w-8ben-solicitation-a64edb69
Truth Social infrastructure abuse via link redirect	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/truth-social-infrastructure-abuse-via-link-redirect-aaaa30a8
Twitter infrastructure abuse via link shortener	Sublime Security	7mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis	/feeds/core/detection-rules/twitter-infrastructure-abuse-via-link-shortener-99ca165e
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters	@delivr_to	1mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis	/feeds/core/detection-rules/url-with-unicode-u2044-or-u2215-characters-12069f5b
Vendor compromise: GovDelivery message with suspicious link	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free subdomain host IPFS Social engineering Evasion Impersonation: Brand Natural Language Understanding URL analysis Whois	/feeds/core/detection-rules/vendor-compromise-govdelivery-message-with-suspicious-link-0d2d5172
Vendor impersonation: Thread hijacking with typosquat domain	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Lookalike domain Social engineering Spoofing Content analysis Natural Language Understanding Sender analysis Whois	/feeds/core/detection-rules/vendor-impersonation-thread-hijacking-with-typosquat-domain-9c2f38ed

510 Rules

Page 10 of 11