Sublime Security

Sublime Core Feed
HTML analysis
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Attack Types
BEC/Fraud
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Reconnaissance
Spam
Tactics and Techniques
Encryption
Evasion
Exploit
Free email provider
Free file host
Free subdomain host
HTML smuggling
ICS Phishing
Image as content
Impersonation: Brand
Impersonation: Employee
Impersonation: VIP
IPFS
ISO
LNK
Lookalike domain
Macros
OneNote
Open redirect
Out of band pivot
PDF
Punycode
QR code
Scripting
Social engineering
Spoofing
Detection Methods
Archive analysis
Content analysis
Computer Vision
Exif analysis
File analysis
Header analysis
HTML analysis
Javascript analysis
Macro analysis
Natural Language Understanding
Optical Character Recognition
OLE analysis
PDF analysis
QR code analysis
Sender analysis
Threat intelligence
URL analysis
URL screenshot
Whois
XML analysis
YARA
Detection Method: HTML analysis
HTML analysis looks at the HTML code in emails, web pages, or attachments to spot potentially malicious elements or deceptive structures. It examines both what’s visible and hidden in the HTML to uncover tactics often used in phishing or malware attacks.
HTML analysis can help you detect:
Hidden scripts or iframes that might run harmful code
Obfuscated JavaScript designed to avoid detection
Misleading hyperlinks where the displayed text doesn’t match the real URL
Forms made to steal credentials or sensitive data
Suspicious HTML comments with hidden instructions
CSS tricks used to hide malicious content
For example, phishing emails often use HTML to replicate trusted login pages. HTML analysis can catch the hidden forms and scripts trying to steal your credentials.
Blog Posts
Talking phish over turkey · Blog · Sublime Security
Living Off the Land: Credential Phishing via Docusign abuse · Blog · Sublime Security
Call Me Maybe? The Rise of Callback Phishing Emails · Blog · Sublime Security
Attack Types (6):
BEC/Fraud
Credential Phishing
Malware/Ransomware
Callback Phishing
Extortion
Spam
Tactics & Techniques (23):
Spoofing
Evasion
Impersonation: Employee
Social engineering
Open redirect
Free subdomain host
Image as content
Out of band pivot
HTML smuggling
Impersonation: Brand
Scripting
Lookalike domain
OneNote
PDF
ICS Phishing
Free file host
Exploit
Free email provider
Impersonation: VIP
Credential Phishing
Encryption
HTML injection
ISO
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Spoofing: Hidden Outlook headers in self-addressed forwards
4h ago
Oct 6th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Spoofing
Evasion
Impersonation: Employee
Social engineering
Header analysis
HTML analysis
XML analysis
Sender analysis
Natural Language Understanding
BEC/Fraud
Credential Phishing
Spoofing
Evasion
Impersonation: Employee
Social engineering
Header analysis
HTML analysis
XML analysis
Sender analysis
Natural Language Understanding
Service abuse: Lovable-hosted redirect to external phishing page
6h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Open redirect
Free subdomain host
URL analysis
HTML analysis
Content analysis
Credential Phishing
Social engineering
Open redirect
Free subdomain host
URL analysis
HTML analysis
Content analysis
Attachment: Fake email body embedded in inline image
1d ago
Oct 5th, 2026
Sublime Security
Credential Phishing
Image as content
Social engineering
Evasion
Optical Character Recognition
Natural Language Understanding
HTML analysis
Header analysis
Sender analysis
Credential Phishing
Image as content
Social engineering
Evasion
Optical Character Recognition
Natural Language Understanding
HTML analysis
Header analysis
Sender analysis
Attachment: Suspicious use of Unicode tag characters in ICS File
2d ago
Oct 4th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Evasion: Suspicious use of Unicode tag characters
2d ago
Oct 4th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Body: Bid solicitation PDF lure
4d ago
Oct 2nd, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
HTML analysis
BEC/Fraud
Social engineering
Content analysis
HTML analysis
Service abuse: Self-service platform redirecting to newly registered suspicious domain
5d ago
Oct 1st, 2026
Sublime Security
Credential Phishing
Out of band pivot
Evasion
URL analysis
Whois
HTML analysis
Credential Phishing
Out of band pivot
Evasion
URL analysis
Whois
HTML analysis
Attachment: HTML smuggling with dynamically constructed redirect URL
7d ago
Sep 29th, 2026
Sublime Security
Credential Phishing
HTML smuggling
Evasion
Impersonation: Brand
Social engineering
Scripting
HTML analysis
Javascript analysis
File analysis
Credential Phishing
HTML smuggling
Evasion
Impersonation: Brand
Social engineering
Scripting
HTML analysis
Javascript analysis
File analysis
Credential phishing: Suspicious e-sign agreement document notification
8d ago
Sep 28th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Header analysis
HTML analysis
URL analysis
Sender analysis
Credential Phishing
Social engineering
Content analysis
Header analysis
HTML analysis
URL analysis
Sender analysis
Brand impersonation: Microsoft logo in HTML with fake quarantine release notification
8d ago
Sep 28th, 2026
Sublime Security
Credential Phishing
Evasion
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
Sender analysis
Credential Phishing
Evasion
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
Sender analysis
Brand impersonation: Fake DocuSign HTML table not linking to DocuSign domains
8d ago
Sep 28th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
Header analysis
Sender analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
Header analysis
Sender analysis
URL analysis
Link: Credential phishing with visit-tracking script
11d ago
Sep 25th, 2026
Sublime Security
Credential Phishing
Scripting
Evasion
Natural Language Understanding
URL analysis
HTML analysis
Javascript analysis
Credential Phishing
Scripting
Evasion
Natural Language Understanding
URL analysis
HTML analysis
Javascript analysis
Sharepoint link likely unrelated to sender
13d ago
Sep 23rd, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Impersonation: Employee
Lookalike domain
OneNote
PDF
Social engineering
URL analysis
Sender analysis
Header analysis
HTML analysis
BEC/Fraud
Credential Phishing
Impersonation: Employee
Lookalike domain
OneNote
PDF
Social engineering
URL analysis
Sender analysis
Header analysis
HTML analysis
Link: Common hidden directory observed
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Evasion
URL analysis
HTML analysis
Credential Phishing
Evasion
URL analysis
HTML analysis
Brand impersonation: Microsoft Teams invitation
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
HTML analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
HTML analysis
URL analysis
Attachment: HTML smuggling with atob and high entropy via calendar invite
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
ICS Phishing
Scripting
File analysis
HTML analysis
Javascript analysis
Sender analysis
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
ICS Phishing
Scripting
File analysis
HTML analysis
Javascript analysis
Sender analysis
Attachment: HTML smuggling with atob and high entropy
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
HTML smuggling
Scripting
Archive analysis
Content analysis
File analysis
HTML analysis
Javascript analysis
Sender analysis
URL analysis
Credential Phishing
Malware/Ransomware
HTML smuggling
Scripting
Archive analysis
Content analysis
File analysis
HTML analysis
Javascript analysis
Sender analysis
URL analysis
Potential prompt injection attack in body HTML
13d ago
Sep 23rd, 2026
Sublime Security
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Spam
BEC/Fraud
Evasion
Social engineering
Header analysis
HTML analysis
Content analysis
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Spam
BEC/Fraud
Evasion
Social engineering
Header analysis
HTML analysis
Content analysis
Image as content with a link to an open redirect
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Image as content
Open redirect
Social engineering
Content analysis
HTML analysis
URL analysis
Credential Phishing
Malware/Ransomware
Evasion
Image as content
Open redirect
Social engineering
Content analysis
HTML analysis
URL analysis
Link: Multistage landing - Scribd document
13d ago
Sep 23rd, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
Impersonation: Brand
Free file host
URL analysis
HTML analysis
Natural Language Understanding
Computer Vision
Optical Character Recognition
URL screenshot
Credential Phishing
Evasion
Social engineering
Impersonation: Brand
Free file host
URL analysis
HTML analysis
Natural Language Understanding
Computer Vision
Optical Character Recognition
URL screenshot
Page 1 of 9

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Spoofing: Hidden Outlook headers in self-addressed forwards	4h ago Oct 6th, 2026	Sublime Security	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Social engineering Header analysis HTML analysis XML analysis Sender analysis Natural Language Understanding
Service abuse: Lovable-hosted redirect to external phishing page	6h ago Oct 6th, 2026	Sublime Security	Credential Phishing Social engineering Open redirect Free subdomain host URL analysis HTML analysis Content analysis
Attachment: Fake email body embedded in inline image	1d ago Oct 5th, 2026	Sublime Security	Credential Phishing Image as content Social engineering Evasion Optical Character Recognition Natural Language Understanding HTML analysis Header analysis Sender analysis
Attachment: Suspicious use of Unicode tag characters in ICS File	2d ago Oct 4th, 2026	Sublime Security	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Evasion: Suspicious use of Unicode tag characters	2d ago Oct 4th, 2026	Sublime Security	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Body: Bid solicitation PDF lure	4d ago Oct 2nd, 2026	Sublime Security	BEC/Fraud Social engineering Content analysis HTML analysis
Service abuse: Self-service platform redirecting to newly registered suspicious domain	5d ago Oct 1st, 2026	Sublime Security	Credential Phishing Out of band pivot Evasion URL analysis Whois HTML analysis
Attachment: HTML smuggling with dynamically constructed redirect URL	7d ago Sep 29th, 2026	Sublime Security	Credential Phishing HTML smuggling Evasion Impersonation: Brand Social engineering Scripting HTML analysis Javascript analysis File analysis
Credential phishing: Suspicious e-sign agreement document notification	8d ago Sep 28th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Header analysis HTML analysis URL analysis Sender analysis
Brand impersonation: Microsoft logo in HTML with fake quarantine release notification	8d ago Sep 28th, 2026	Sublime Security	Credential Phishing Evasion Impersonation: Brand Social engineering Content analysis HTML analysis Sender analysis
Brand impersonation: Fake DocuSign HTML table not linking to DocuSign domains	8d ago Sep 28th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis HTML analysis Header analysis Sender analysis URL analysis
Link: Credential phishing with visit-tracking script	11d ago Sep 25th, 2026	Sublime Security	Credential Phishing Scripting Evasion Natural Language Understanding URL analysis HTML analysis Javascript analysis
Sharepoint link likely unrelated to sender	13d ago Sep 23rd, 2026	Sublime Security	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML analysis
Link: Common hidden directory observed	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Evasion URL analysis HTML analysis
Brand impersonation: Microsoft Teams invitation	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis HTML analysis URL analysis
Attachment: HTML smuggling with atob and high entropy via calendar invite	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion HTML smuggling ICS Phishing Scripting File analysis HTML analysis Javascript analysis Sender analysis
Attachment: HTML smuggling with atob and high entropy	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Malware/Ransomware HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis Sender analysis URL analysis
Potential prompt injection attack in body HTML	13d ago Sep 23rd, 2026	Sublime Security	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis
Image as content with a link to an open redirect	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Image as content Open redirect Social engineering Content analysis HTML analysis URL analysis
Link: Multistage landing - Scribd document	13d ago Sep 23rd, 2026	Sublime Security	Credential Phishing Evasion Social engineering Impersonation: Brand Free file host URL analysis HTML analysis Natural Language Understanding Computer Vision Optical Character Recognition URL screenshot