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
Impersonation: Human Resources with link or attachment and engaging language	Sublime Security	6mo ago Jul 16th, 2025	BEC/Fraud Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/impersonation-human-resources-with-link-or-attachment-and-engaging-language-8c95a6a8
Impersonation: Internal corporate services	Sublime Security	4d ago Jan 20th, 2026	Credential Phishing Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/impersonation-internal-corporate-services-3cd04f33
Impersonation: SharePoint reply header anomaly	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Impersonation: Brand Evasion Spoofing Header analysis Content analysis Sender analysis	/feeds/core/detection-rules/impersonation-sharepoint-reply-header-anomaly-78875848
Impersonation: Suspected supplier impersonation with suspicious content	Sublime Security	11mo ago Feb 3rd, 2025	BEC/Fraud Evasion Free email provider Lookalike domain Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois	/feeds/core/detection-rules/impersonation-suspected-supplier-impersonation-with-suspicious-content-63d8b1ce
Impersonation using recipient domain (untrusted sender)	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/impersonation-using-recipient-domain-untrusted-sender-63e5808a
Inbound message from popular service via newly observed distribution list	Sublime Security	5mo ago Aug 5th, 2025	Callback Phishing Evasion Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/inbound-message-from-popular-service-via-newly-observed-distribution-list-8f4bc148
Invoicera infrastructure abuse	Sublime Security	2y ago Mar 7th, 2024	Credential Phishing Spam Free file host Free subdomain host Image as content Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/invoicera-infrastructure-abuse-1e56f310
Job scam (unsolicited sender)	Sublime Security	2mo ago Nov 3rd, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/job-scam-unsolicited-sender-a37dc32d
Job scam with specific salary pattern	Sublime Security	3d ago Jan 21st, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding Header analysis Sender analysis	/feeds/core/detection-rules/job-scam-with-specific-salary-pattern-af7f9e21
Link abuse: Self-service creation platform link with suspicious recipient behavior	Sublime Security	1mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Spam Free email provider Social engineering Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/link-abuse-self-service-creation-platform-link-with-suspicious-recipient-behavior-384ad135
Link: Base64 encoded recipient address in URL fragment with subject hash	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Encryption Evasion Social engineering Content analysis URL analysis Header analysis	/feeds/core/detection-rules/link-base64-encoded-recipient-address-in-url-fragment-with-subject-hash-eb9694b8
Link: Credential phishing link with undisclosed recipients	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Evasion Computer Vision Header analysis URL screenshot	/feeds/core/detection-rules/link-credential-phishing-link-with-undisclosed-recipients-06fc155e
Link: Credential phishing traversing Russian infrastructure	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/link-credential-phishing-traversing-russian-infrastructure-a5203e3b
Link: Credential phishing via WordPress	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Social engineering Free subdomain host URL analysis Header analysis Computer Vision	/feeds/core/detection-rules/link-credential-phishing-via-wordpress-db696058
Link: Cryptocurrency fraud with suspicious links	Sublime Security	1mo ago Dec 1st, 2025	BEC/Fraud Social engineering Evasion Free subdomain host Scripting Content analysis Header analysis Javascript analysis Natural Language Understanding Sender analysis URL analysis URL screenshot Whois	/feeds/core/detection-rules/link-cryptocurrency-fraud-with-suspicious-links-d0da37ce
Link: Direct link to riddle.com hosted showcase	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Free file host Sender analysis URL analysis Header analysis	/feeds/core/detection-rules/link-direct-link-to-riddlecom-hosted-showcase-cca7d2f5
Link: Direct link to Zoom Docs from non-Zoom sender	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Social engineering Impersonation: Brand Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/link-direct-link-to-zoom-docs-from-non-zoom-sender-5c6362db
Link: Display text matches subject line	Sublime Security	2mo ago Nov 14th, 2025	BEC/Fraud Credential Phishing Social engineering Evasion Header analysis Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/link-display-text-matches-subject-line-ba722cf0
Link: Executable file download with suspicious message content	Sublime Security	3mo ago Oct 16th, 2025	Credential Phishing Malware/Ransomware Evasion Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis Header analysis	/feeds/core/detection-rules/link-executable-file-download-with-suspicious-message-content-ce9a4926
Link: File sharing impersonation with suspicious language and sending patterns	Sublime Security	2mo ago Oct 31st, 2025	BEC/Fraud Credential Phishing Social engineering Free subdomain host Impersonation: Brand Natural Language Understanding URL analysis Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/link-file-sharing-impersonation-with-suspicious-language-and-sending-patterns-d3363041
Link: Free file hosting with undisclosed recipients	Sublime Security	4mo ago Sep 11th, 2025	Credential Phishing Malware/Ransomware Free file host Free subdomain host Evasion Header analysis URL analysis Sender analysis Natural Language Understanding	/feeds/core/detection-rules/link-free-file-hosting-with-undisclosed-recipients-b6281306
Link: Free subdomain host with undisclosed recipients	Sublime Security	12d ago Jan 12th, 2026	Free subdomain host Header analysis URL analysis	/feeds/core/detection-rules/link-free-subdomain-host-with-undisclosed-recipients-c23d979d
Link: Intuit link abuse with file share context	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering URL analysis Natural Language Understanding Content analysis Header analysis	/feeds/core/detection-rules/link-intuit-link-abuse-with-file-share-context-cd15cc34
Link: Microsoft protected message with matching sender and recipient addresses	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis File analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/link-microsoft-protected-message-with-matching-sender-and-recipient-addresses-a5a2f75d
Link: Multistage landing - Abused Adobe Acrobat hosted PDF	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Optical Character Recognition URL analysis Header analysis Sender analysis	/feeds/core/detection-rules/link-multistage-landing-abused-adobe-acrobat-hosted-pdf-609081ef
Link: Multistage landing - Ludus presentation	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Evasion Social engineering Impersonation: Brand Header analysis URL analysis Computer Vision URL screenshot Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/link-multistage-landing-ludus-presentation-a8b3c311
Link: .onion From Unsolicited Sender	Sublime Security	5mo ago Jul 30th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering URL analysis Header analysis Sender analysis	/feeds/core/detection-rules/link-onion-from-unsolicited-sender-9ac0fc83
Link: Personal SharePoint with invalid recipients and credential theft language	Sublime Security	8h ago Jan 23rd, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/link-personal-sharepoint-with-invalid-recipients-and-credential-theft-language-79d5403d
Link: Recipient domain in URL path	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Lookalike domain Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/link-recipient-domain-in-url-path-de08731f
Link: Referrer anonymization service from untrusted sender	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/link-referrer-anonymization-service-from-untrusted-sender-9fab2e1e
Link: Romance/Sexual Language With Suspicious Link	Sublime Security	5mo ago Aug 22nd, 2025	Spam Social engineering Content analysis Header analysis URL analysis Whois	/feeds/core/detection-rules/link-romancesexual-language-with-suspicious-link-d5694cae
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis	/feeds/core/detection-rules/link-self-sender-with-sender-org-in-subject-and-credential-theft-indicator-bfa9aa08
Link: Self-sent message with quarterly document review request	Sublime Security	3d ago Jan 21st, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/link-self-sent-message-with-quarterly-document-review-request-3c42cec6
Link: Squarespace infrastructure abuse	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Spam Impersonation: Brand Social engineering Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/link-squarespace-infrastructure-abuse-a8fe9d30
Link: Suspicious Sharepoint folder share	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Free file host Evasion HTML analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/link-suspicious-sharepoint-folder-share-6168a08c
Link: Uncommon SharePoint document type with sender's display name	Sublime Security	5mo ago Aug 5th, 2025	Credential Phishing Social engineering OneNote PDF Content analysis Header analysis HTML analysis URL analysis	/feeds/core/detection-rules/link-uncommon-sharepoint-document-type-with-senders-display-name-02d290b2
Mass campaign: Cross Site Scripting (XSS) attempt	Sublime Security	6mo ago Jul 16th, 2025	Malware/Ransomware Spam Exploit Free email provider Scripting Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/mass-campaign-cross-site-scripting-xss-attempt-6cbb7124
Mass campaign: recipient address in subject, body, and link (untrusted sender)	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/mass-campaign-recipient-address-in-subject-body-and-link-untrusted-sender-599dabf5
Message traversed multiple onmicrosoft.com tenants	Sublime Security	12d 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	12d 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
Newly registered sender or reply-to domain with newly registered linked domain	Sublime Security	5mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Social engineering Header analysis URL analysis Whois	/feeds/core/detection-rules/newly-registered-sender-or-reply-to-domain-with-newly-registered-linked-domain-e5b6a81f
Open redirect: giving.lluh.org	Sublime Security	8mo 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 (go2.aspx) leading to Microsoft credential phishing	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Open redirect Content analysis Header analysis URL analysis	/feeds/core/detection-rules/open-redirect-go2aspx-leading-to-microsoft-credential-phishing-51667096
Open Redirect: Google domain with /url path and suspicious indicators	Sublime Security	12d 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: marketing.edinburghairport.com	Sublime Security	8mo 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	8mo 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	8mo 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: queue.swytchbike.com	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Open redirect Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/open-redirect-queueswytchbikecom-916003d1
Open redirect: slubnaglowie.pl	Sublime Security	8mo 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: Xfinity CMP Redirection to Google AMP	Sublime Security	5mo 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

337 Rules

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