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 Oct 23rd, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	8mo 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	7mo ago Mar 10th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Spam: Sexually explicit Google Drive share	Sublime Security	1y ago Aug 5th, 2025	Spam Social engineering Free email provider Content analysis Sender analysis
Spam: Sexually explicit Google group invitation	Sublime Security	11mo ago Nov 12th, 2025	Spam Free email provider Social engineering Content analysis Sender analysis
Spam: Sexually explicit Looker Studio report	Sublime Security	1y ago Oct 2nd, 2025	Spam Social engineering Free email provider Content analysis Sender analysis
Spam: Single recipient duplicated in cc	Sublime Security	4mo ago Jun 5th, 2026	Spam Impersonation: Brand Social engineering Header analysis Content analysis URL analysis Sender analysis
Spam: Spoofed Outlook mailer with unsubscribe and reference ID footer	Sublime Security	2mo ago Aug 21st, 2026	Spam Social engineering Spoofing Content analysis Header analysis
Spam: Suspicious toll-free phone number	Sublime Security	3mo ago Jul 27th, 2026	Spam Social engineering Content analysis
Spam: Unsolicited WordPress account creation or password reset request	Sublime Security	11mo ago Nov 24th, 2025	Spam Social engineering Header analysis Sender analysis URL analysis
Spoofable internal domain with suspicious signals	Sublime Security	1y ago Jul 23rd, 2025	Credential Phishing Free file host Free subdomain host Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Spoofing: Hidden Outlook headers in self-addressed forwards	Sublime Security	19d ago Oct 6th, 2026	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Social engineering Header analysis HTML analysis XML analysis Sender analysis Natural Language Understanding
Subject and sender display name contains matching long alphanumeric string	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Suspected lookalike domain with suspicious language	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Evasion Lookalike domain Social engineering Content analysis Natural Language Understanding Sender analysis Whois
Suspected WordPress abuse with cross-site scripting (XSS) indicators	Sublime Security	1y ago Aug 5th, 2025	Malware/Ransomware Credential Phishing Scripting Impersonation: Brand Social engineering Content analysis Sender analysis
Suspicious attachment with unscannable Cloudflare link	Sublime Security	1mo ago Sep 23rd, 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 display name: Gmail sender with engaging language	Sublime Security	7mo ago Mar 6th, 2026	BEC/Fraud Credential Phishing Social engineering Sender analysis
Suspicious DocuSign share from new domain	Sublime Security	1y ago Aug 5th, 2025	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Suspicious invoice reference with missing or image-only attachments	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Social engineering Content analysis Computer Vision File analysis Natural Language Understanding Sender analysis
Suspicious link to Looker Studio (lookerstudio.google.com) from a new and unsolicited sender	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Social engineering Content analysis Sender analysis URL analysis
Suspicious mailer received from Gmail servers	Sublime Security	1y ago Jul 16th, 2025	Callback Phishing Spam Free email provider Social engineering Header analysis
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	1mo ago Sep 23rd, 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	9mo 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 request for financial information	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis
Targeting: Specific AOL address	Sublime Security	6mo ago Mar 31st, 2026	Spam Social engineering Header analysis
Tax Form: W-8BEN solicitation	Sublime Security	8mo ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis URL analysis
Truth Social infrastructure abuse via link redirect	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis
Twitter infrastructure abuse via link shortener	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters	@delivr_to	2mo ago Aug 11th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis
Vendor compromise: GovDelivery message with suspicious link	Sublime Security	1y 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	9mo 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	5mo ago May 4th, 2026	Callback Phishing BEC/Fraud Social engineering Impersonation: Brand Evasion Natural Language Understanding Content analysis Sender analysis HTML analysis
VIP impersonation: Fabricated thread history with fake VIP recipients	Sublime Security	3mo ago Jul 8th, 2026	BEC/Fraud Impersonation: VIP Social engineering Evasion Spoofing Content analysis Header analysis Sender analysis
VIP impersonation: Fake forwarded indicator with VIP recipient impersonation	Sublime Security	3mo ago Jul 7th, 2026	BEC/Fraud Impersonation: VIP Social engineering Evasion Content analysis Sender analysis
VIP impersonation: Fake thread with display name match, email mismatch	Sublime Security	6mo ago Apr 3rd, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
VIP impersonation: Fake thread with name-in-brackets header artifact	Sublime Security	4d ago Oct 21st, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis
VIP impersonation: Fake thread with VIPs missing email metadata	Sublime Security	2mo ago Aug 11th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Natural Language Understanding Header analysis Content analysis Sender analysis
VIP impersonation: Invoice fraud with mobile device sign-off	Sublime Security	3d ago Oct 22nd, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Sender analysis
VIP impersonation: Payment handoff with VIP display name authored fake threads	Sublime Security	4d ago Oct 21st, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis Header analysis
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	2mo ago Aug 5th, 2026	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: VIP handoff with fake forwarded invoice thread	Sublime Security	2mo ago Aug 17th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Out of band pivot Header analysis Content analysis URL analysis Sender analysis
VIP impersonation: VIP name within a delimited subject with fake previous threads	Sublime Security	9d ago Oct 16th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Content analysis Sender analysis Header analysis
VIP impersonation: VIP payment redirect handoff via fake threads	Sublime Security	4d ago Oct 21st, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis Header analysis
VIP impersonation: VIP recipient of previous thread with HTML generator	Sublime Security	3mo ago Jul 7th, 2026	BEC/Fraud Impersonation: VIP Social engineering Evasion HTML analysis Content analysis Sender analysis
VIP impersonation with BEC language (near match, untrusted sender)	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis
VIP impersonation with charitable donation fraud	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with urgent request (strict match, untrusted sender)	Sublime Security	1mo ago Sep 23rd, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Content analysis Natural Language Understanding Sender analysis
Xero infrastructure abuse	Sublime Security	11mo ago Nov 3rd, 2025	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Xero invoice abuse	Sublime Security	10mo 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	5mo ago May 15th, 2026	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 Jul 8th, 2026	Credential Phishing Free file host Free subdomain host Social engineering Impersonation: Brand Header analysis HTML analysis Natural Language Understanding URL analysis

850 Rules

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