Sublime Security

Sublime Core Feed
Content analysis
Learn More
Login to Sublime
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):
ICS Phishing
Credential Phishing
BEC/Fraud
Malware/Ransomware
Spam
Callback Phishing
Extortion
Reconnaissance
Tactics & Techniques (26):
Social engineering
Evasion
ICS Phishing
Impersonation: Brand
Spoofing
Encryption
PDF
Free email provider
Image as content
Free file host
Free subdomain host
Lookalike domain
Open redirect
Out of band pivot
Scripting
Impersonation: VIP
Impersonation: Employee
HTML smuggling
QR code
LNK
Exploit
Service abuse
Macros
Credential Phishing
OneNote
HTML injection
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Attachment: ICS calendar file with suspicious UID domain
4d ago
Sep 4th, 2026
Sublime Security
ICS Phishing
Credential Phishing
BEC/Fraud
Social engineering
File analysis
Content analysis
ICS Phishing
Credential Phishing
BEC/Fraud
Social engineering
File analysis
Content analysis
Attachment: ICS file with excessive custom properties
4d ago
Sep 4th, 2026
Sublime Security
Malware/Ransomware
Evasion
ICS Phishing
File analysis
Content analysis
Malware/Ransomware
Evasion
ICS Phishing
File analysis
Content analysis
Attachment: ICS calendar file with recipient address in UID field
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Social engineering
File analysis
Content analysis
Credential Phishing
Social engineering
File analysis
Content analysis
Brand impersonation: MyChart
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Spoofing
Content analysis
Natural Language Understanding
Header analysis
Sender analysis
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Spoofing
Content analysis
Natural Language Understanding
Header analysis
Sender analysis
Attachment: Encrypted PDF with credential theft body
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Encryption
Evasion
PDF
Social engineering
Content analysis
Exif analysis
File analysis
Natural Language Understanding
Sender analysis
Credential Phishing
Encryption
Evasion
PDF
Social engineering
Content analysis
Exif analysis
File analysis
Natural Language Understanding
Sender analysis
Attachment: Encrypted PDF with credential theft language in EML
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Encryption
Evasion
PDF
Social engineering
Content analysis
Exif analysis
File analysis
Natural Language Understanding
Sender analysis
Credential Phishing
Encryption
Evasion
PDF
Social engineering
Content analysis
Exif analysis
File analysis
Natural Language Understanding
Sender analysis
Observed IOC: Malicious domains in body links
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Observed IOC: Malicious root domains in body links
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential phishing: Suspicious e-sign agreement document notification
4d ago
Sep 4th, 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: AARP
4d ago
Sep 4th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
BEC/Fraud
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Credential phishing: Engaging language and other indicators (untrusted sender)
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
Free email provider
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
URL analysis
Credential Phishing
Free email provider
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
URL analysis
Impersonation: SAM/SBA federal registration
4d ago
Sep 4th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Impersonation: Brand
Social engineering
Image as content
Sender analysis
Content analysis
HTML analysis
Header analysis
Credential Phishing
BEC/Fraud
Impersonation: Brand
Social engineering
Image as content
Sender analysis
Content analysis
HTML analysis
Header analysis
Brand impersonation: Cloud services with credential theft intent
5d ago
Sep 3rd, 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
Attachment: ICS calendar invite with bid/RFP lure and suspicious link
5d ago
Sep 3rd, 2026
Sublime Security
BEC/Fraud
ICS Phishing
Social engineering
Free file host
Free subdomain host
Lookalike domain
File analysis
Content analysis
URL analysis
Whois
BEC/Fraud
ICS Phishing
Social engineering
Free file host
Free subdomain host
Lookalike domain
File analysis
Content analysis
URL analysis
Whois
Body: CSS Hidden text via table-column
5d ago
Sep 3rd, 2026
Sublime Security
Credential Phishing
Spam
Evasion
HTML analysis
Content analysis
Credential Phishing
Spam
Evasion
HTML analysis
Content analysis
Brand impersonation: USPS
6d ago
Sep 2nd, 2026
Sublime Security
Credential Phishing
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Natural Language Understanding
Sender analysis
Credential Phishing
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Natural Language Understanding
Sender analysis
Attachment: ICS voicemail lure with suspicious link
6d ago
Sep 2nd, 2026
Sublime Security
ICS Phishing
Credential Phishing
Social engineering
Free file host
Evasion
File analysis
Content analysis
URL analysis
Whois
Header analysis
ICS Phishing
Credential Phishing
Social engineering
Free file host
Evasion
File analysis
Content analysis
URL analysis
Whois
Header analysis
Business Email Compromise (BEC) with request for mobile number
6d ago
Sep 2nd, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Observed IOC: Malicious URLs in body links
6d ago
Sep 2nd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Open redirect: Generic link.html redirector abuse
7d ago
Sep 1st, 2026
Sublime Security
Spam
Credential Phishing
Open redirect
Social engineering
URL analysis
Content analysis
Spam
Credential Phishing
Open redirect
Social engineering
URL analysis
Content analysis
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Attachment: ICS calendar file with suspicious UID domain	4d ago Sep 4th, 2026	Sublime Security	ICS Phishing Credential Phishing BEC/Fraud Social engineering File analysis Content analysis
Attachment: ICS file with excessive custom properties	4d ago Sep 4th, 2026	Sublime Security	Malware/Ransomware Evasion ICS Phishing File analysis Content analysis
Attachment: ICS calendar file with recipient address in UID field	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Social engineering File analysis Content analysis
Brand impersonation: MyChart	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Spam Impersonation: Brand Social engineering Spoofing Content analysis Natural Language Understanding Header analysis Sender analysis
Attachment: Encrypted PDF with credential theft body	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Attachment: Encrypted PDF with credential theft language in EML	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Observed IOC: Malicious domains in body links	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Observed IOC: Malicious root domains in body links	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Credential phishing: Suspicious e-sign agreement document notification	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Header analysis HTML analysis URL analysis Sender analysis
Brand impersonation: AARP	4d ago Sep 4th, 2026	Sublime Security	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Credential phishing: Engaging language and other indicators (untrusted sender)	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Impersonation: SAM/SBA federal registration	4d ago Sep 4th, 2026	Sublime Security	Credential Phishing BEC/Fraud Impersonation: Brand Social engineering Image as content Sender analysis Content analysis HTML analysis Header analysis
Brand impersonation: Cloud services with credential theft intent	5d ago Sep 3rd, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link	5d ago Sep 3rd, 2026	Sublime Security	BEC/Fraud ICS Phishing Social engineering Free file host Free subdomain host Lookalike domain File analysis Content analysis URL analysis Whois
Body: CSS Hidden text via table-column	5d ago Sep 3rd, 2026	Sublime Security	Credential Phishing Spam Evasion HTML analysis Content analysis
Brand impersonation: USPS	6d ago Sep 2nd, 2026	Sublime Security	Credential Phishing Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Natural Language Understanding Sender analysis
Attachment: ICS voicemail lure with suspicious link	6d ago Sep 2nd, 2026	Sublime Security	ICS Phishing Credential Phishing Social engineering Free file host Evasion File analysis Content analysis URL analysis Whois Header analysis
Business Email Compromise (BEC) with request for mobile number	6d ago Sep 2nd, 2026	Sublime Security	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis
Observed IOC: Malicious URLs in body links	6d ago Sep 2nd, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Open redirect: Generic link.html redirector abuse	7d ago Sep 1st, 2026	Sublime Security	Spam Credential Phishing Open redirect Social engineering URL analysis Content analysis