Sublime Security

Sublime Core Feed
Content 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: Content analysis
Content analysis looks at the language and structure of a message to identify signs of phishing, social engineering, and other malicious intent. Instead of scanning for keywords, this method uses natural language understanding (NLU) to detect meaning, intent, and tone across the message.
Content analysis helps detect:
BEC attempts with urgent messages from executive impersonators
Credential phishing disguised as login or document notifications
Callback scams posing as account renewals or fake support
Extortion threats or blackmail messages
Financial or personal data requests in suspicious contexts
Fake job offers targeting employees
Invoice fraud, payroll fraud, and more
For example, a phishing email may impersonate a CFO asking for a wire transfer. Content analysis can flag the urgent tone, financial context, and impersonation attempt.
Blog Posts
Hiding a $50,000 BEC financial fraud in a fake email thread · Blog · Sublime Security
Callback phishing via invoice abuse and distribution list relays · Blog · Sublime Security
Hidden credential phishing within EML attachments · Blog · Sublime Security
Living Off the Land: Credential Phishing via Docusign abuse · Blog · Sublime Security
Living Off the Land: Callback Phishing via Docusign comment · Blog · Sublime Security
Adversarial ML: Extortion via LLM Manipulation Tactics · Blog · Sublime Security
Fake invoice used to conduct $16,800 BEC attempt · Blog · Sublime Security
QR Code Phishing: Decoding Hidden Threats · Blog · Sublime Security
Call Me Maybe? The Rise of Callback Phishing Emails · Blog · Sublime Security
Detecting QakBot: WSF attachments, OneNote files, and generic attack surface reduction · Blog · Sublime Security
Attack Types (8):
Credential Phishing
Extortion
Spam
BEC/Fraud
Callback Phishing
Malware/Ransomware
ICS Phishing
Reconnaissance
Tactics & Techniques (26):
Evasion
Social engineering
Impersonation: Brand
Spoofing
Free email provider
Free file host
Out of band pivot
Impersonation: Employee
Lookalike domain
PDF
Free subdomain host
HTML smuggling
Open redirect
Encryption
Image as content
Impersonation: VIP
ICS Phishing
QR code
LNK
Scripting
Exploit
Service abuse
Macros
Credential Phishing
OneNote
HTML injection
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters
13h ago
Aug 6th, 2026
Credential Phishing
Evasion
Social engineering
Content analysis
URL analysis
Credential Phishing
Evasion
Social engineering
Content analysis
URL analysis
Brand impersonation: SoFi
13h ago
Aug 6th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Natural Language Understanding
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Natural Language Understanding
URL analysis
Brand impersonation: Punchbowl
14h ago
Aug 6th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Sender analysis
Extortion / sextortion in attachment from untrusted sender
22h ago
Aug 6th, 2026
Sublime Security
Extortion
Social engineering
Spoofing
Computer Vision
Content analysis
File analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
Extortion
Social engineering
Spoofing
Computer Vision
Content analysis
File analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
Spam: Fake photo share
22h ago
Aug 6th, 2026
Sublime Security
Spam
Evasion
Social engineering
Content analysis
Sender analysis
URL analysis
Whois
Spam
Evasion
Social engineering
Content analysis
Sender analysis
URL analysis
Whois
BEC: Tax document request
23h ago
Aug 6th, 2026
Sublime Security
BEC/Fraud
Social engineering
Spoofing
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Social engineering
Spoofing
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Brand impersonation: Cloud services with credential theft intent
23h ago
Aug 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
Credential Phishing
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
Callback phishing: Zero-width character obfuscation from freemail sender
2d ago
Aug 5th, 2026
Sublime Security
Callback Phishing
Free email provider
Evasion
Social engineering
HTML analysis
Content analysis
Sender analysis
Callback Phishing
Free email provider
Evasion
Social engineering
HTML analysis
Content analysis
Sender analysis
Body: CSS Hidden text via clip-path
2d ago
Aug 5th, 2026
Sublime Security
Spam
Credential Phishing
Evasion
HTML analysis
Content analysis
Spam
Credential Phishing
Evasion
HTML analysis
Content analysis
Service abuse: Wufoo credential theft
2d ago
Aug 5th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
HTML analysis
Natural Language Understanding
Sender analysis
Credential Phishing
Social engineering
Content analysis
HTML analysis
Natural Language Understanding
Sender analysis
Link: Mismatched free file host links with document lure
2d ago
Aug 5th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Free file host
Social engineering
Natural Language Understanding
URL analysis
Content analysis
BEC/Fraud
Credential Phishing
Free file host
Social engineering
Natural Language Understanding
URL analysis
Content analysis
Callback phishing in body or attachment (untrusted sender)
2d ago
Aug 5th, 2026
Sublime Security
Callback Phishing
Out of band pivot
Social engineering
Content analysis
File analysis
Optical Character Recognition
Natural Language Understanding
Sender analysis
Callback Phishing
Out of band pivot
Social engineering
Content analysis
File analysis
Optical Character Recognition
Natural Language Understanding
Sender analysis
Attachment: Callback phishing solicitation via text-based file
2d ago
Aug 5th, 2026
Sublime Security
Callback Phishing
Evasion
Out of band pivot
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
Callback Phishing
Evasion
Out of band pivot
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
HTML: Template placeholders or recipient email in element class attributes
2d ago
Aug 5th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Evasion
Social engineering
HTML analysis
Content analysis
Credential Phishing
BEC/Fraud
Evasion
Social engineering
HTML analysis
Content analysis
VIP Impersonation via Google Group relay with suspicious indicators
2d ago
Aug 5th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Malware/Ransomware
Evasion
Free email provider
Impersonation: Employee
Social engineering
Spoofing
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Credential Phishing
Malware/Ransomware
Evasion
Free email provider
Impersonation: Employee
Social engineering
Spoofing
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Spam: Cold outreach from Cloudflare-hosted newly registered domain
3d ago
Aug 4th, 2026
Sublime Security
Spam
Evasion
Social engineering
Whois
Natural Language Understanding
Content analysis
Spam
Evasion
Social engineering
Whois
Natural Language Understanding
Content analysis
Service abuse: Cognito Forms with short body from unknown sender
3d ago
Aug 4th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Sender analysis
URL analysis
Credential Phishing
Social engineering
Content analysis
Sender analysis
URL analysis
Brand impersonation: Okta
3d ago
Aug 4th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Computer Vision
Content analysis
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Computer Vision
Content analysis
Header analysis
Sender analysis
Brand impersonation: SiriusXM
3d ago
Aug 4th, 2026
Sublime Security
Callback Phishing
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Callback Phishing
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Attachment: Targeted DOCX with personalized recipient acknowledgement lure
3d ago
Aug 4th, 2026
Sublime Security
Credential Phishing
Social engineering
Archive analysis
Content analysis
File analysis
XML analysis
Credential Phishing
Social engineering
Archive analysis
Content analysis
File analysis
XML analysis
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters	13h ago Aug 6th, 2026	@delivr_to	Credential Phishing Evasion Social engineering Content analysis URL analysis
Brand impersonation: SoFi	13h ago Aug 6th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis Natural Language Understanding URL analysis
Brand impersonation: Punchbowl	14h ago Aug 6th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis
Extortion / sextortion in attachment from untrusted sender	22h ago Aug 6th, 2026	Sublime Security	Extortion Social engineering Spoofing Computer Vision Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Spam: Fake photo share	22h ago Aug 6th, 2026	Sublime Security	Spam Evasion Social engineering Content analysis Sender analysis URL analysis Whois
BEC: Tax document request	23h ago Aug 6th, 2026	Sublime Security	BEC/Fraud Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Brand impersonation: Cloud services with credential theft intent	23h ago Aug 6th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Callback phishing: Zero-width character obfuscation from freemail sender	2d ago Aug 5th, 2026	Sublime Security	Callback Phishing Free email provider Evasion Social engineering HTML analysis Content analysis Sender analysis
Body: CSS Hidden text via clip-path	2d ago Aug 5th, 2026	Sublime Security	Spam Credential Phishing Evasion HTML analysis Content analysis
Service abuse: Wufoo credential theft	2d ago Aug 5th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis
Link: Mismatched free file host links with document lure	2d ago Aug 5th, 2026	Sublime Security	BEC/Fraud Credential Phishing Free file host Social engineering Natural Language Understanding URL analysis Content analysis
Callback phishing in body or attachment (untrusted sender)	2d ago Aug 5th, 2026	Sublime Security	Callback Phishing Out of band pivot Social engineering Content analysis File analysis Optical Character Recognition Natural Language Understanding Sender analysis
Attachment: Callback phishing solicitation via text-based file	2d ago Aug 5th, 2026	Sublime Security	Callback Phishing Evasion Out of band pivot Social engineering Content analysis File analysis Header analysis Sender analysis
HTML: Template placeholders or recipient email in element class attributes	2d ago Aug 5th, 2026	Sublime Security	Credential Phishing BEC/Fraud Evasion Social engineering HTML analysis Content analysis
VIP Impersonation via Google Group relay with suspicious indicators	2d ago Aug 5th, 2026	Sublime Security	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Spam: Cold outreach from Cloudflare-hosted newly registered domain	3d ago Aug 4th, 2026	Sublime Security	Spam Evasion Social engineering Whois Natural Language Understanding Content analysis
Service abuse: Cognito Forms with short body from unknown sender	3d ago Aug 4th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Sender analysis URL analysis
Brand impersonation: Okta	3d ago Aug 4th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Computer Vision Content analysis Header analysis Sender analysis
Brand impersonation: SiriusXM	3d ago Aug 4th, 2026	Sublime Security	Callback Phishing Credential Phishing Spam Free email provider Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Attachment: Targeted DOCX with personalized recipient acknowledgement lure	3d ago Aug 4th, 2026	Sublime Security	Credential Phishing Social engineering Archive analysis Content analysis File analysis XML analysis