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

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Rule Name & Severity	Author	Last Updated	Labels
Adobe branded PDF file linking to a password-protected file from untrusted sender	Sublime Security	6mo ago Jul 16th, 2025	Malware/Ransomware Encryption Evasion Impersonation: Brand PDF Archive analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/adobe-branded-pdf-file-linking-to-a-password-protected-file-from-untrusted-sender-5ea75469
Attachment: 7z Archive Containing RAR File	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-7z-archive-containing-rar-file-1a629bb4
Attachment: Any HTML file within archive (unsolicited)	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Archive analysis File analysis	/feeds/core/detection-rules/attachment-any-html-file-within-archive-unsolicited-6a67c02c
Attachment: Any .sap file (unsolicited)	Sublime Security	2mo ago Oct 27th, 2025	Malware/Ransomware Evasion Scripting File analysis Header analysis Sender analysis	/feeds/core/detection-rules/attachment-any-sap-file-unsolicited-220ed3de
Attachment: Archive containing disallowed file type	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-archive-containing-disallowed-file-type-3859e3e7
Attachment: Archive containing HTML file with file scheme link	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Evasion Exploit HTML smuggling Social engineering Archive analysis File analysis HTML analysis	/feeds/core/detection-rules/attachment-archive-containing-html-file-with-file-scheme-link-edf6d0d9
Attachment: Archive with embedded CHM file	Sublime Security	3y ago Aug 21st, 2023	Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-archive-with-embedded-chm-file-5280e94d
Attachment: Archive with embedded EXE file	Sublime Security	2y ago Feb 27th, 2024	Malware/Ransomware Evasion Archive analysis File analysis YARA	/feeds/core/detection-rules/attachment-archive-with-embedded-exe-file-e2b0ad86
Attachment: Archive with pdf, txt and wsf files	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion PDF Archive analysis File analysis	/feeds/core/detection-rules/attachment-archive-with-pdf-txt-and-wsf-files-16b2e239
Attachment: Base64 encoded bash command in filename	@vector_sec	4mo ago Sep 5th, 2025	Malware/Ransomware Encryption Evasion Archive analysis File analysis Content analysis	/feeds/core/detection-rules/attachment-base64-encoded-bash-command-in-filename-819f69c8
Attachment: Calendar file with invisible Unicode characters	Sublime Security	11d ago Jan 12th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Evasion File analysis Content analysis	/feeds/core/detection-rules/attachment-calendar-file-with-invisible-unicode-characters-050fceac
Attachment: Calendar invite from recently registered domain	Sublime Security	4mo ago Sep 25th, 2025	Callback Phishing Evasion Social engineering File analysis Whois	/feeds/core/detection-rules/attachment-calendar-invite-from-recently-registered-domain-d801521c
Attachment: Callback phishing solicitation via image file	@vector_sec	11d ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Out of band pivot Social engineering Image as content Content analysis Optical Character Recognition Sender analysis URL analysis Computer Vision	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-image-file-60acbb36
Attachment: Callback phishing solicitation via pdf file	Sublime Security	5mo ago Aug 5th, 2025	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-pdf-file-ac33f097
Attachment: Callback phishing solicitation via text-based file	Sublime Security	4mo ago Sep 22nd, 2025	Callback Phishing Evasion Out of band pivot Social engineering Content analysis File analysis Header analysis Sender analysis	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-text-based-file-ca39c83a
Attachment: .csproj with suspicious commands	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting File analysis	/feeds/core/detection-rules/attachment-csproj-with-suspicious-commands-fe45b81d
Attachment: DocX embedded binary	Sublime Security	5mo ago Aug 5th, 2025	Malware/Ransomware Evasion Archive analysis Content analysis YARA	/feeds/core/detection-rules/attachment-docx-embedded-binary-feff0241
Attachment: DOCX with hyperlink targeting recipient address	Sublime Security	1mo ago Dec 17th, 2025	Credential Phishing Malware/Ransomware Evasion Social engineering File analysis Archive analysis XML analysis	/feeds/core/detection-rules/attachment-docx-with-hyperlink-targeting-recipient-address-9ec8fa49
Attachment: Double base64-encoded zip file in HTML smuggling attachment	@ajpc500	5mo ago Aug 5th, 2025	Malware/Ransomware Credential Phishing Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Sender analysis	/feeds/core/detection-rules/attachment-double-base64-encoded-zip-file-in-html-smuggling-attachment-61ebb07b
Attachment: Embedded VBScript in MHT file (unsolicited)	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting Archive analysis File analysis HTML analysis Sender analysis	/feeds/core/detection-rules/attachment-embedded-vbscript-in-mht-file-unsolicited-b30353a6
Attachment: EML containing a base64 encoded script	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Evasion HTML smuggling Scripting Social engineering File analysis HTML analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-containing-a-base64-encoded-script-fc3d9445
Attachment: EML file contains HTML attachment with login portal indicators	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Evasion HTML smuggling Content analysis File analysis Header analysis HTML analysis Javascript analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-file-contains-html-attachment-with-login-portal-indicators-6e4df158
Attachment: EML file with HTML attachment (unsolicited)	Sublime Security	5mo ago Aug 20th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Content analysis File analysis Header analysis HTML analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-file-with-html-attachment-unsolicited-c24fd191
Attachment: EML file with IPFS links	Sublime Security	2mo ago Nov 4th, 2025	Credential Phishing Evasion Free file host Free subdomain host IPFS File analysis URL analysis	/feeds/core/detection-rules/attachment-eml-file-with-ipfs-links-1fe9d7e7
Attachment: EML with embedded Javascript in SVG file	Sublime Security	5mo ago Aug 8th, 2025	Credential Phishing Malware/Ransomware Scripting Evasion File analysis Javascript analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-with-embedded-javascript-in-svg-file-dfafb78f
Attachment: EML with Encrypted ZIP	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion Archive analysis File analysis YARA	/feeds/core/detection-rules/attachment-eml-with-encrypted-zip-6897a8f7
Attachment: EML with link to credential phishing page	Sublime Security	6mo ago Jul 16th, 2025	Credential Phishing Evasion Free file host Free subdomain host Social engineering Computer Vision Content analysis File analysis Header analysis HTML analysis Natural Language Understanding Optical Character Recognition URL analysis URL screenshot	/feeds/core/detection-rules/attachment-eml-with-link-to-credential-phishing-page-1df41cca
Attachment: EML with SharePoint files shared from GoDaddy federated tenants	Sublime Security	4mo ago Sep 23rd, 2025	Credential Phishing Evasion Impersonation: Brand Social engineering File analysis URL analysis Content analysis	/feeds/core/detection-rules/attachment-eml-with-sharepoint-files-shared-from-godaddy-federated-tenants-02c1f590
Attachment: EML with Sharepoint link likely unrelated to sender	Sublime Security	4mo ago Sep 23rd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Evasion File analysis URL analysis Header analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-with-sharepoint-link-likely-unrelated-to-sender-0a4fd31b
Attachment: EML with suspicious indicators	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis File analysis	/feeds/core/detection-rules/attachment-eml-with-suspicious-indicators-deb5d08d
Attachment: Emotet heavily padded doc in zip file	Sublime Security	6mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis Content analysis Exif analysis File analysis Sender analysis	/feeds/core/detection-rules/attachment-emotet-heavily-padded-doc-in-zip-file-9a5332ed
Attachment: Encrypted PDF with credential theft body	Sublime Security	1mo ago Dec 1st, 2025	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/attachment-encrypted-pdf-with-credential-theft-body-c9596c9a
Attachment: Encrypted zip file with payment-related lure	Sublime Security	1mo ago Nov 25th, 2025	BEC/Fraud Malware/Ransomware Encryption Evasion Social engineering Archive analysis Content analysis File analysis	/feeds/core/detection-rules/attachment-encrypted-zip-file-with-payment-related-lure-5d1eb7af
Attachment: Excel file with suspicious template identifier	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Evasion Macros Exif analysis File analysis	/feeds/core/detection-rules/attachment-excel-file-with-suspicious-template-identifier-40f84b4b
Attachment: Excel Web Query File (IQY)	@jkcoote	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-excel-web-query-file-iqy-510412b5
Attachment: Fake attachment image lure	Sublime Security	4mo ago Sep 22nd, 2025	Credential Phishing Malware/Ransomware Evasion Image as content Social engineering File analysis Natural Language Understanding Optical Character Recognition	/feeds/core/detection-rules/attachment-fake-attachment-image-lure-96b8b285
Attachment: Fake Slack installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/attachment-fake-slack-installer-cded2d2f
Attachment: Fake Zoom installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/attachment-fake-zoom-installer-840a12a6
Attachment: File execution via Javascript	Sublime Security	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting Archive analysis File analysis Javascript analysis Sender analysis	/feeds/core/detection-rules/attachment-file-execution-via-javascript-627ae0b1
Attachment: Filename containing Unicode braille pattern blank character	@vector_sec	5mo ago Aug 5th, 2025	Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-filename-containing-unicode-braille-pattern-blank-character-c230ca86
Attachment: Filename containing Unicode right-to-left override character	@vector_sec	11d ago Jan 12th, 2026	Malware/Ransomware Evasion Archive analysis File analysis	/feeds/core/detection-rules/attachment-filename-containing-unicode-right-to-left-override-character-357c57a1
Attachment: HTML attachment with Javascript location	@vector_sec	5mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis Javascript analysis HTML analysis	/feeds/core/detection-rules/attachment-html-attachment-with-javascript-location-e0611295
Attachment: HTML file contains exclusively Javascript	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis File analysis	/feeds/core/detection-rules/attachment-html-file-contains-exclusively-javascript-b6d38168
Attachment: HTML file with excessive 'const' declarations and abnormally long timeouts	Sublime Security	2mo ago Nov 3rd, 2025	Malware/Ransomware Credential Phishing HTML smuggling Scripting Evasion HTML analysis File analysis Content analysis	/feeds/core/detection-rules/attachment-html-file-with-excessive-const-declarations-and-abnormally-long-timeouts-66f8a07a
Attachment: HTML file with excessive padding and suspicious patterns	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling File analysis HTML analysis YARA	/feeds/core/detection-rules/attachment-html-file-with-excessive-padding-and-suspicious-patterns-0a6aee1e
Attachment: HTML smuggling 'body onload' linking to suspicious destination	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis URL analysis	/feeds/core/detection-rules/attachment-html-smuggling-body-onload-linking-to-suspicious-destination-c1e2beed
Attachment: HTML smuggling 'body onload' with high entropy and suspicious text	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis	/feeds/core/detection-rules/attachment-html-smuggling-body-onload-with-high-entropy-and-suspicious-text-329ac12d
Attachment: HTML smuggling with atob and high entropy via calendar invite	Sublime Security	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting File analysis HTML analysis Javascript analysis Sender analysis	/feeds/core/detection-rules/attachment-html-smuggling-with-atob-and-high-entropy-via-calendar-invite-94d84614
Attachment: HTML smuggling with base64 encoded ZIP file	Sublime Security	2mo ago Nov 20th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis	/feeds/core/detection-rules/attachment-html-smuggling-with-base64-encoded-zip-file-47e388de
Attachment: HTML smuggling with concatenation obfuscation	@vector_sec	11d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis	/feeds/core/detection-rules/attachment-html-smuggling-with-concatenation-obfuscation-108ab346

313 Rules

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