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
Spam: Mastercard promotional content with image-based body	Sublime Security	5mo 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
Spam: New job cold outreach from unsolicited sender	Sublime Security	6mo ago Sep 29th, 2025	Spam Content analysis Natural Language Understanding Sender analysis URL analysis
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	1mo ago Feb 24th, 2026	Spam Evasion Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis
Spam: Sexually explicit content with emoji in subject from freemail provider	Sublime Security	1mo ago Mar 10th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Spam: Website errors solicitation	Sublime Security	11d ago Apr 14th, 2026	Spam Content analysis Sender analysis Natural Language Understanding
Spoofable internal domain with suspicious signals	Sublime Security	9mo ago Jul 23rd, 2025	Credential Phishing Free file host Free subdomain host Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Suspected lookalike domain with suspicious language	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Evasion Lookalike domain Social engineering Content analysis Natural Language Understanding Sender analysis Whois
Suspicious attachment with unscannable Cloudflare link	Sublime Security	3mo 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
Suspicious invoice reference with missing or image-only attachments	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Computer Vision File analysis Natural Language Understanding Sender analysis
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois
Suspicious recipient pattern and language with low reputation link to login	Sublime Security	3mo 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
Suspicious recipients pattern with NLU credential theft indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding URL analysis
Suspicious recipients pattern with no Compauth pass and suspicious content	Sublime Security	3mo ago Jan 12th, 2026	Content analysis Computer Vision Header analysis Natural Language Understanding URL analysis URL screenshot
Vendor compromise: GovDelivery message with suspicious link	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free subdomain host IPFS Social engineering Evasion Impersonation: Brand Natural Language Understanding URL analysis Whois
Vendor impersonation: Thread hijacking with typosquat domain	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Lookalike domain Social engineering Spoofing Content analysis Natural Language Understanding Sender analysis Whois
Venmo payment request abuse	Sublime Security	7mo ago Sep 5th, 2025	Callback Phishing BEC/Fraud Social engineering Impersonation: Brand Evasion Natural Language Understanding Content analysis Sender analysis HTML analysis
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	5mo ago Nov 12th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with BEC language (near match, untrusted sender)	Sublime Security	1mo ago Mar 25th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis
VIP impersonation with charitable donation fraud	Sublime Security	5mo ago Nov 12th, 2025	BEC/Fraud Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with invoicing request	Sublime Security	2y ago Apr 23rd, 2024	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
VIP impersonation with urgent request (strict match, untrusted sender)	Sublime Security	1mo ago Mar 25th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Content analysis Natural Language Understanding Sender analysis
VIP impersonation with w2 request with reply-to mismatch	Sublime Security	1mo ago Mar 12th, 2026	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
Xero infrastructure abuse	Sublime Security	5mo ago Nov 3rd, 2025	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Xero invoice abuse	Sublime Security	4mo ago Dec 17th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Impersonation: Employee Social engineering Natural Language Understanding Content analysis Sender analysis
X (Twitter) impersonation with credential phishing motives	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Header analysis Optical Character Recognition Natural Language Understanding Sender analysis
Zoom Events newsletter abuse	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free file host Free subdomain host Social engineering Impersonation: Brand Header analysis HTML analysis Natural Language Understanding URL analysis

226 Rules

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