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 Apr 24th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Callback phishing via Microsoft comment	Sublime Security	11d ago Apr 13th, 2026	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Callback Phishing via Signable E-Signature Request	Sublime Security	3mo 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
Callback phishing via SignFree e-signature request	Sublime Security	3mo 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
Callback phishing via Xodo Sign comment	Sublime Security	3mo 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
Callback phishing via Yammer comment	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Header analysis
Callback phishing via Zelle Service Abuse	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Callback phishing via Zoho service abuse	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Optical Character Recognition
Callback Phishing via Zoom comment	Sublime Security	2mo ago Feb 11th, 2026	Callback Phishing Out of band pivot Social engineering Impersonation: Brand Computer Vision Content analysis Header analysis Sender analysis
Callback scam: Impersonation via TimeTrade infrastructure	Sublime Security	8mo ago Aug 20th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Sender analysis Header analysis
Catbox.moe link from untrusted source	Sublime Security	8mo ago Aug 5th, 2025	Malware/Ransomware Free file host Social engineering Header analysis Sender analysis URL analysis
ClickFunnels link infrastructure abuse	Sublime Security	2mo ago Feb 5th, 2026	Credential Phishing Free email provider Free subdomain host Social engineering Content analysis Header analysis QR code analysis Sender analysis URL analysis
Cloud storage impersonation with credential theft indicators	Sublime Security	1d ago Apr 23rd, 2026	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
Constant Contact link infrastructure abuse	Sublime Security	6mo ago Oct 17th, 2025	Credential Phishing Free email provider Open redirect Social engineering Content analysis Header analysis QR code analysis Sender analysis
COVID-19 themed fraud with sender and reply-to mismatch or compensation award	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Credential phishing: DocuSign embedded image lure with no DocuSign domains in links	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Credential phishing: Engaging language and other indicators (untrusted sender)	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Credential phishing: Financial lure via ActiveCampaign infrastructure	Sublime Security	28d ago Mar 27th, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Credential phishing: Hyper-linked image leading to free file host	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Free file host Image as content Social engineering Content analysis Header analysis Sender analysis URL analysis
Credential phishing: Image as content, short or no body contents	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Image as content Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition
Credential phishing language and suspicious indicators (unknown sender)	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Credential phishing: Onedrive impersonation	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Credential phishing: Re-Authentication lure	Sublime Security	6mo ago Oct 17th, 2025	Credential Phishing Social engineering Impersonation: Brand Natural Language Understanding Content analysis URL analysis Header analysis Sender analysis
Credential phishing: Suspicious e-sign agreement document notification	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis HTML analysis URL analysis Sender analysis
Credential Phishing: Suspicious language, link, recipients and other indicators	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Credential phishing: Suspicious subject with urgent financial request and link	Sublime Security	4d ago Apr 20th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Credential phishing: Tax form impersonation with payment request	Sublime Security	2mo ago Feb 13th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering PDF Content analysis Header analysis Sender analysis URL analysis
Cyrillic vowel substitution in subject or display name from unknown sender	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis
Deceptive Dropbox mention	Sublime Security	3mo 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
Display name and subject impersonation using recipient SLD (new sender)	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Social engineering Header analysis Sender analysis
Display Name Emoji with Financial Symbols	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Social engineering Evasion Content analysis Header analysis Sender analysis
Display name impersonation using recipient SLD	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Sender analysis
DocuSign impersonation via CloudHQ links	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing BEC/Fraud Impersonation: Brand Free file host Header analysis URL analysis Content analysis Sender analysis
DocuSign impersonation via spoofed Intuit sender	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Spoofing Header analysis Sender analysis
Domain impersonation: Freemail reply-to local lookalike with financial request	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
EML attachment with credential theft language (unknown sender)	Sublime Security	1mo ago Mar 17th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding Sender analysis Content analysis Header analysis
Employee impersonation with urgent request (untrusted sender)	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Impersonation: Employee Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Extortion / sextortion (untrusted sender)	Sublime Security	3mo ago Jan 22nd, 2026	Extortion Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Fake message thread - Untrusted sender with a mismatched freemail reply-to address	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
Fake message thread with a suspicious link and engaging language from an unknown sender	Sublime Security	5mo ago Nov 12th, 2025	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
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
Fake thread with suspicious indicators	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Fake Zoom meeting invite with suspicious link	Sublime Security	4mo ago Dec 1st, 2025	Credential Phishing Impersonation: Brand Evasion Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
File sharing link with a suspicious subject	Sublime Security	2mo ago Feb 17th, 2026	BEC/Fraud Free file host Social engineering Header analysis Sender analysis URL analysis
Fraudulent e-commerce operators	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis Sender analysis
Free email provider sender with mismatched provider reply-to	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Free email provider Social engineering Header analysis Sender analysis
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
Generic service abuse from newly registered domain	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Evasion Social engineering Header analysis Sender analysis Whois
Google Notification alert link from non-Google sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Header analysis Sender analysis URL analysis
Google services using g.co shortlinks	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free email provider Content analysis Header analysis Sender analysis URL analysis
Google share notification with suspicious comments	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: VIP Free file host HTML analysis Header analysis Sender analysis Content analysis

371 Rules

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