Sublime Security

Sublime Core Feed
File 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: File analysis
File analysis breaks down and inspects file contents, formats, and embedded elements to uncover hidden threats. This method goes beyond basic file attributes, deeply examining the inner structure of files to find potentially malicious content that looks legitimate on the surface.
File analysis helps detect:
Malicious macros in Office documents (Word, Excel, PowerPoint)
Obfuscated scripts hidden in PDFs or other document types
Executable code disguised in non-executable files
Hidden text content using encoding or steganography
Suspicious metadata or file properties suggesting tampering
Blog Posts
Tax season email attacks: AdWind RATs and Tycoon 2FA phishing kits · Blog · Sublime Security
Hiding a $50,000 BEC financial fraud in a fake email thread · Blog · Sublime Security
Talking phish over turkey · Blog · Sublime Security
Abusing Discord to deliver Agent Tesla malware · Blog · Sublime Security
Scripting Vector Grifts: SVG phishing with smuggled JS and adversary in the middle tactics · Blog · Sublime Security
Gotta Catch 'Em All: Detecting PikaBot Delivery Techniques · 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 (6):
Credential Phishing
Malware/Ransomware
BEC/Fraud
Spam
Callback Phishing
Extortion
Tactics & Techniques (25):
PDF
Social engineering
Evasion
HTML smuggling
Impersonation: Brand
Image as content
QR code
Free file host
ICS Phishing
Open redirect
Free subdomain host
Lookalike domain
Encryption
Scripting
Out of band pivot
Free email provider
Spoofing
Impersonation: Employee
Impersonation: VIP
LNK
Macros
Exploit
OneNote
IPFS
ISO
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Attachment: PDF with a suspicious string and single URL
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
PDF
Social engineering
Evasion
Content analysis
File analysis
URL analysis
Exif analysis
Credential Phishing
PDF
Social engineering
Evasion
Content analysis
File analysis
URL analysis
Exif analysis
Attachment: EML file with HTML attachment (unsolicited)
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
Content analysis
File analysis
Header analysis
HTML analysis
Sender analysis
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
Content analysis
File analysis
Header analysis
HTML analysis
Sender analysis
Brand impersonation: Dropbox
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
Attachment: Fake LinkedIn invoice PDF lure
4d ago
Oct 23rd, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Impersonation: Brand
PDF
Social engineering
YARA
File analysis
BEC/Fraud
Credential Phishing
Impersonation: Brand
PDF
Social engineering
YARA
File analysis
Prompt injection: Instructions to an AI in a calendar invite
6d ago
Oct 21st, 2026
Sublime Security
BEC/Fraud
Evasion
Social engineering
Content analysis
File analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Evasion
Social engineering
Content analysis
File analysis
Natural Language Understanding
Sender analysis
Attachment: GCPay blurred check PDF
7d ago
Oct 20th, 2026
Sublime Security
BEC/Fraud
PDF
Social engineering
Image as content
File analysis
YARA
BEC/Fraud
PDF
Social engineering
Image as content
File analysis
YARA
Attachment: PDF small QR code template
7d ago
Oct 20th, 2026
Sublime Security
Credential Phishing
PDF
QR code
File analysis
YARA
QR code analysis
Credential Phishing
PDF
QR code
File analysis
YARA
QR code analysis
Attachment: PDF USDOC ITA signature lure
8d ago
Oct 19th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
PDF
File analysis
YARA
Credential Phishing
Malware/Ransomware
PDF
File analysis
YARA
Attachment: PDF blue OneDrive lure
8d ago
Oct 19th, 2026
Sublime Security
Credential Phishing
PDF
Impersonation: Brand
Social engineering
YARA
File analysis
Credential Phishing
PDF
Impersonation: Brand
Social engineering
YARA
File analysis
Attachment: PDF with Microsoft compensation lure
8d ago
Oct 19th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
PDF
Impersonation: Brand
Social engineering
YARA
File analysis
BEC/Fraud
Credential Phishing
PDF
Impersonation: Brand
Social engineering
YARA
File analysis
Attachment: Re-stamped invoice PDF with IRS references from external sender
11d ago
Oct 16th, 2026
Sublime Security
BEC/Fraud
PDF
Social engineering
Impersonation: Brand
Exif analysis
File analysis
Optical Character Recognition
BEC/Fraud
PDF
Social engineering
Impersonation: Brand
Exif analysis
File analysis
Optical Character Recognition
Attachment: ICS voicemail lure with suspicious link
13d ago
Oct 14th, 2026
Sublime Security
Credential Phishing
Social engineering
Free file host
Evasion
ICS Phishing
File analysis
Content analysis
URL analysis
Whois
Header analysis
Credential Phishing
Social engineering
Free file host
Evasion
ICS Phishing
File analysis
Content analysis
URL analysis
Whois
Header analysis
Attachment: ICS with Suspicious Office 365 app authorization (OAuth) link
13d ago
Oct 14th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
ICS Phishing
File analysis
Content analysis
URL analysis
Credential Phishing
Evasion
Social engineering
ICS Phishing
File analysis
Content analysis
URL analysis
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links
13d ago
Oct 14th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Evasion
PDF
File analysis
URL analysis
Content analysis
Credential Phishing
Impersonation: Brand
Evasion
PDF
File analysis
URL analysis
Content analysis
Open Redirect: Google domain with /url path and suspicious indicators
13d ago
Oct 14th, 2026
Sublime Security
Credential Phishing
Evasion
Open redirect
Computer Vision
Content analysis
File analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
URL analysis
Credential Phishing
Evasion
Open redirect
Computer Vision
Content analysis
File analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
URL analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link
13d ago
Oct 14th, 2026
Sublime Security
BEC/Fraud
Social engineering
Free file host
Free subdomain host
Lookalike domain
ICS Phishing
File analysis
Content analysis
URL analysis
Whois
BEC/Fraud
Social engineering
Free file host
Free subdomain host
Lookalike domain
ICS Phishing
File analysis
Content analysis
URL analysis
Whois
Attachment: Meetergo booking link
18d ago
Oct 9th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Social engineering
Evasion
File analysis
URL analysis
BEC/Fraud
Credential Phishing
Social engineering
Evasion
File analysis
URL analysis
Attachment: Fictitious invoice using LinkedIn's address
18d ago
Oct 9th, 2026
Sublime Security
BEC/Fraud
PDF
Social engineering
File analysis
Optical Character Recognition
Natural Language Understanding
Content analysis
Exif analysis
BEC/Fraud
PDF
Social engineering
File analysis
Optical Character Recognition
Natural Language Understanding
Content analysis
Exif analysis
Attachment: PDF Adobe lure
18d ago
Oct 9th, 2026
Sublime Security
Credential Phishing
PDF
Social engineering
YARA
File analysis
Credential Phishing
PDF
Social engineering
YARA
File analysis
Attachment: PDF Object Hash - Encrypted PDF with blue doc icon
18d ago
Oct 9th, 2026
Sublime Security
Credential Phishing
PDF
File analysis
Credential Phishing
PDF
File analysis
Page 1 of 19

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Attachment: PDF with a suspicious string and single URL	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing PDF Social engineering Evasion Content analysis File analysis URL analysis Exif analysis
Attachment: EML file with HTML attachment (unsolicited)	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion HTML smuggling Content analysis File analysis Header analysis HTML analysis Sender analysis
Brand impersonation: Dropbox	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Sender analysis
Attachment: Fake LinkedIn invoice PDF lure	4d ago Oct 23rd, 2026	Sublime Security	BEC/Fraud Credential Phishing Impersonation: Brand PDF Social engineering YARA File analysis
Prompt injection: Instructions to an AI in a calendar invite	6d ago Oct 21st, 2026	Sublime Security	BEC/Fraud Evasion Social engineering Content analysis File analysis Natural Language Understanding Sender analysis
Attachment: GCPay blurred check PDF	7d ago Oct 20th, 2026	Sublime Security	BEC/Fraud PDF Social engineering Image as content File analysis YARA
Attachment: PDF small QR code template	7d ago Oct 20th, 2026	Sublime Security	Credential Phishing PDF QR code File analysis YARA QR code analysis
Attachment: PDF USDOC ITA signature lure	8d ago Oct 19th, 2026	Sublime Security	Credential Phishing Malware/Ransomware PDF File analysis YARA
Attachment: PDF blue OneDrive lure	8d ago Oct 19th, 2026	Sublime Security	Credential Phishing PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: PDF with Microsoft compensation lure	8d ago Oct 19th, 2026	Sublime Security	BEC/Fraud Credential Phishing PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: Re-stamped invoice PDF with IRS references from external sender	11d ago Oct 16th, 2026	Sublime Security	BEC/Fraud PDF Social engineering Impersonation: Brand Exif analysis File analysis Optical Character Recognition
Attachment: ICS voicemail lure with suspicious link	13d ago Oct 14th, 2026	Sublime Security	Credential Phishing Social engineering Free file host Evasion ICS Phishing File analysis Content analysis URL analysis Whois Header analysis
Attachment: ICS with Suspicious Office 365 app authorization (OAuth) link	13d ago Oct 14th, 2026	Sublime Security	Credential Phishing Evasion Social engineering ICS Phishing File analysis Content analysis URL analysis
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links	13d ago Oct 14th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Evasion PDF File analysis URL analysis Content analysis
Open Redirect: Google domain with /url path and suspicious indicators	13d ago Oct 14th, 2026	Sublime Security	Credential Phishing Evasion Open redirect Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link	13d ago Oct 14th, 2026	Sublime Security	BEC/Fraud Social engineering Free file host Free subdomain host Lookalike domain ICS Phishing File analysis Content analysis URL analysis Whois
Attachment: Meetergo booking link	18d ago Oct 9th, 2026	Sublime Security	BEC/Fraud Credential Phishing Social engineering Evasion File analysis URL analysis
Attachment: Fictitious invoice using LinkedIn's address	18d ago Oct 9th, 2026	Sublime Security	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis
Attachment: PDF Adobe lure	18d ago Oct 9th, 2026	Sublime Security	Credential Phishing PDF Social engineering YARA File analysis
Attachment: PDF Object Hash - Encrypted PDF with blue doc icon	18d ago Oct 9th, 2026	Sublime Security	Credential Phishing PDF File analysis