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T1027

Obfuscated Files or Information

Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses. Payloads may be compressed, archived, or encrypted in order to avoid detection. These payloads may be used during Initial Access or later to mitigate detection. Sometimes a user's action may be required to open and [...

ESXiLinuxmacOSNetwork DevicesWindows
606
Detections
6
Sources
18
Threat Actors

BY SOURCE

457sublime90sigma44elastic11splunk_escu2crowdstrike_cql2kql

PROCEDURES (129)

General Monitoring36 detections

Auto-extracted: 36 detections for general monitoring

Attachment29 detections

Auto-extracted: 29 detections for attachment

Powershell25 detections

Auto-extracted: 25 detections for powershell

Email Security23 detections

Auto-extracted: 23 detections for email security

Credential21 detections

Auto-extracted: 21 detections for credential

Email21 detections

Auto-extracted: 21 detections for email

Powershell21 detections

Auto-extracted: 21 detections for powershell

Authentication Monitoring21 detections

Auto-extracted: 21 detections for authentication monitoring

Impersonat14 detections

Auto-extracted: 14 detections for impersonat

Base6413 detections

Auto-extracted: 13 detections for base64

Powershell13 detections

Auto-extracted: 13 detections for powershell

Script Execution Monitoring12 detections

Auto-extracted: 12 detections for script execution monitoring

Attachment12 detections

Auto-extracted: 12 detections for attachment

Service11 detections

Auto-extracted: 11 detections for service

Bypass11 detections

Auto-extracted: 11 detections for bypass

Amsi10 detections

Auto-extracted: 10 detections for amsi

Base6410 detections

Auto-extracted: 10 detections for base64

Suspicious9 detections

Auto-extracted: 9 detections for suspicious

Credential9 detections

Auto-extracted: 9 detections for credential

Network Connection Monitoring8 detections

Auto-extracted: 8 detections for network connection monitoring

Impersonat8 detections

Auto-extracted: 8 detections for impersonat

Bypass8 detections

Auto-extracted: 8 detections for bypass

Phish7 detections

Auto-extracted: 7 detections for phish

Suspicious7 detections

Auto-extracted: 7 detections for suspicious

Phish7 detections

Auto-extracted: 7 detections for phish

Credential6 detections

Auto-extracted: 6 detections for credential

Suspicious6 detections

Auto-extracted: 6 detections for suspicious

Email6 detections

Auto-extracted: 6 detections for email

Base646 detections

Auto-extracted: 6 detections for base64

Download5 detections

Auto-extracted: 5 detections for download

Service5 detections

Auto-extracted: 5 detections for service

Credential5 detections

Auto-extracted: 5 detections for credential

Obfuscat5 detections

Auto-extracted: 5 detections for obfuscat

Download5 detections

Auto-extracted: 5 detections for download

Service5 detections

Auto-extracted: 5 detections for service

Ransomware5 detections

Auto-extracted: 5 detections for ransomware

Phish5 detections

Auto-extracted: 5 detections for phish

Encrypt5 detections

Auto-extracted: 5 detections for encrypt

Encrypt4 detections

Auto-extracted: 4 detections for encrypt

Credential4 detections

Auto-extracted: 4 detections for credential

Api4 detections

Auto-extracted: 4 detections for api

Bypass4 detections

Auto-extracted: 4 detections for bypass

Attachment4 detections

Auto-extracted: 4 detections for attachment

Unusual4 detections

Auto-extracted: 4 detections for unusual

Process Creation Monitoring4 detections

Auto-extracted: 4 detections for process creation monitoring

Office3 detections

Auto-extracted: 3 detections for office

Office3 detections

Auto-extracted: 3 detections for office

Bypass3 detections

Auto-extracted: 3 detections for bypass

Suspicious3 detections

Auto-extracted: 3 detections for suspicious

Service3 detections

Auto-extracted: 3 detections for service

Obfuscat3 detections

Auto-extracted: 3 detections for obfuscat

Powershell3 detections

Auto-extracted: 3 detections for powershell

Download3 detections

Auto-extracted: 3 detections for download

Office3 detections

Auto-extracted: 3 detections for office

Evasion3 detections

Auto-extracted: 3 detections for evasion

Script Block3 detections

Auto-extracted: 3 detections for script block

Encrypt2 detections

Auto-extracted: 2 detections for encrypt

Api2 detections

Auto-extracted: 2 detections for api

Token2 detections

Auto-extracted: 2 detections for token

Macro2 detections

Auto-extracted: 2 detections for macro

Cloud2 detections

Auto-extracted: 2 detections for cloud

Service2 detections

Auto-extracted: 2 detections for service

Impersonat2 detections

Auto-extracted: 2 detections for impersonat

Phish2 detections

Auto-extracted: 2 detections for phish

Http2 detections

Auto-extracted: 2 detections for http

Evasion2 detections

Auto-extracted: 2 detections for evasion

Evasion2 detections

Auto-extracted: 2 detections for evasion

Encrypt2 detections

Auto-extracted: 2 detections for encrypt

Service2 detections

Auto-extracted: 2 detections for service

Cloud2 detections

Auto-extracted: 2 detections for cloud

Office2 detections

Auto-extracted: 2 detections for office

Suspicious2 detections

Auto-extracted: 2 detections for suspicious

Http2 detections

Auto-extracted: 2 detections for http

Unusual2 detections

Auto-extracted: 2 detections for unusual

Attachment2 detections

Auto-extracted: 2 detections for attachment

Suspicious2 detections

Auto-extracted: 2 detections for suspicious

Unusual2 detections

Auto-extracted: 2 detections for unusual

Evasion2 detections

Auto-extracted: 2 detections for evasion

Evasion2 detections

Auto-extracted: 2 detections for evasion

Credential1 detections

Auto-extracted: 1 detections for credential

Aws1 detections

Auto-extracted: 1 detections for aws

Impersonat1 detections

Auto-extracted: 1 detections for impersonat

Script Block1 detections

Auto-extracted: 1 detections for script block

Inject1 detections

Auto-extracted: 1 detections for inject

Base641 detections

Auto-extracted: 1 detections for base64

File Monitoring1 detections

Auto-extracted: 1 detections for file monitoring

Cloud1 detections

Auto-extracted: 1 detections for cloud

Powershell1 detections

Auto-extracted: 1 detections for powershell

Inject1 detections

Auto-extracted: 1 detections for inject

Command And Control1 detections

Auto-extracted: 1 detections for command and control

Inject1 detections

Auto-extracted: 1 detections for inject

Macro1 detections

Auto-extracted: 1 detections for macro

Amsi1 detections

Auto-extracted: 1 detections for amsi

Oauth1 detections

Auto-extracted: 1 detections for oauth

Download1 detections

Auto-extracted: 1 detections for download

Office1 detections

Auto-extracted: 1 detections for office

Token1 detections

Auto-extracted: 1 detections for token

Base641 detections

Auto-extracted: 1 detections for base64

Token1 detections

Auto-extracted: 1 detections for token

Command Line Monitoring1 detections

Auto-extracted: 1 detections for command line monitoring

Container1 detections

Auto-extracted: 1 detections for container

Attachment1 detections

Auto-extracted: 1 detections for attachment

Evasion1 detections

Auto-extracted: 1 detections for evasion

Exfiltrat1 detections

Auto-extracted: 1 detections for exfiltrat

Download1 detections

Auto-extracted: 1 detections for download

Base641 detections

Auto-extracted: 1 detections for base64

Unusual1 detections

Auto-extracted: 1 detections for unusual

Api1 detections

Auto-extracted: 1 detections for api

Attachment1 detections

Auto-extracted: 1 detections for attachment

Aws1 detections

Auto-extracted: 1 detections for aws

Unusual1 detections

Auto-extracted: 1 detections for unusual

Unusual1 detections

Auto-extracted: 1 detections for unusual

Command And Control1 detections

Auto-extracted: 1 detections for command and control

Token1 detections

Auto-extracted: 1 detections for token

Http1 detections

Auto-extracted: 1 detections for http

Base641 detections

Auto-extracted: 1 detections for base64

Obfuscat1 detections

Auto-extracted: 1 detections for obfuscat

Impersonat1 detections

Auto-extracted: 1 detections for impersonat

Oauth1 detections

Auto-extracted: 1 detections for oauth

Oauth1 detections

Auto-extracted: 1 detections for oauth

Remote1 detections

Auto-extracted: 1 detections for remote

Email1 detections

Auto-extracted: 1 detections for email

Email1 detections

Auto-extracted: 1 detections for email

Api1 detections

Auto-extracted: 1 detections for api

Base641 detections

Auto-extracted: 1 detections for base64

Unusual1 detections

Auto-extracted: 1 detections for unusual

Exfiltrat1 detections

Auto-extracted: 1 detections for exfiltrat

Exfiltrat1 detections

Auto-extracted: 1 detections for exfiltrat

Container1 detections

Auto-extracted: 1 detections for container

DETECTIONS (606)

Abuse: Cloudflare Workers Hosted EvilTokens Domain Structure
sublimehigh
Adobe branded PDF file linking to a password-protected file from untrusted sender
sublimehigh
Attachment with encrypted zip (unsolicited)
sublimemedium
Attachment with macro calling executable
sublimehigh
Attachment with unscannable encrypted zip
sublimemedium
Attachment: .csproj with suspicious commands
sublimehigh
Attachment: 7z Archive Containing RAR File
sublimemedium
Attachment: Any .sap file (unsolicited)
sublimelow
Attachment: Any HTML file within archive (unsolicited)
sublimemedium
Attachment: Archive containing disallowed file type
sublimelow
Attachment: Archive containing HTML file with file scheme link
sublimehigh
Attachment: Archive with embedded CHM file
sublimemedium
Attachment: Archive with embedded EXE file
sublimehigh
Attachment: Archive with pdf, txt and wsf files
sublimemedium
Attachment: Base64 encoded bash command in filename
sublimehigh
Attachment: Calendar file with invisible Unicode characters
sublimehigh
Attachment: Calendar invite from recently registered domain
sublimehigh
Attachment: Callback phishing solicitation via image file
sublimehigh
Attachment: Callback phishing solicitation via pdf file
sublimehigh
Attachment: Callback phishing solicitation via text-based file
sublimemedium
Attachment: DocX embedded binary
sublimehigh
Attachment: DOCX with hyperlink targeting recipient address
sublimemedium
Attachment: DOCX with malicious document template artifacts
sublimemedium
Attachment: Double base64-encoded zip file in HTML smuggling attachment
sublimehigh
Attachment: Embedded VBScript in MHT file
sublimemedium
Attachment: EML containing a base64 encoded script
sublimehigh
Attachment: EML file contains HTML attachment with login portal indicators
sublimehigh
Attachment: EML file with HTML attachment (unsolicited)
sublimemedium
Attachment: EML file with IPFS links
sublimemedium
Attachment: EML with embedded Javascript in SVG file
sublimehigh
Attachment: EML with Encrypted ZIP
sublimelow
Attachment: EML with link to credential phishing page
sublimehigh
Attachment: EML with QR code redirecting to Cloudflare challenges
sublimelow
Attachment: EML with SharePoint files shared from GoDaddy federated tenants
sublimelow
Attachment: EML with Sharepoint link likely unrelated to sender
sublimemedium
Attachment: EML with suspicious indicators
sublimemedium
Attachment: Emotet heavily padded doc in zip file
sublimehigh
Attachment: Employment contract update with suspicious file naming
sublimehigh
Attachment: Encrypted Microsoft Office file (unsolicited)
sublimemedium
Attachment: Encrypted PDF With Credential Harvesting Indicators
sublimemedium
Attachment: Encrypted PDF with credential theft body
sublimemedium
Attachment: Encrypted PDF with credential theft language in EML
sublimemedium
Attachment: Encrypted ZIP containing VHDX file
sublimemedium
Attachment: Encrypted zip file with payment-related lure
sublimemedium
Attachment: Excel file with suspicious template identifier
sublimehigh
Attachment: Excel Web Query File (IQY)
sublimehigh
Attachment: Fake attachment image lure
sublimemedium
Attachment: Fake Slack installer
sublimehigh
Attachment: Fake Zoom installer
sublimehigh
Attachment: File execution via Javascript
sublimemedium
Attachment: Filename containing Unicode braille pattern blank character
sublimehigh
Attachment: Filename containing Unicode right-to-left override character
sublimehigh
Attachment: Finance themed PDF with observed phishing template
sublimemedium
Attachment: HTML attachment with Javascript location
sublimehigh
Attachment: HTML file contains exclusively Javascript
sublimemedium
Attachment: HTML file with excessive 'const' declarations and abnormally long timeouts
sublimehigh
Attachment: HTML file with excessive padding and suspicious patterns
sublimehigh
Attachment: HTML smuggling 'body onload' linking to suspicious destination
sublimehigh
Attachment: HTML smuggling 'body onload' with high entropy and suspicious text
sublimehigh
Attachment: HTML smuggling with atob and high entropy via calendar invite
sublimehigh
Attachment: HTML smuggling with base64 encoded ZIP file
sublimemedium
Attachment: HTML smuggling with concatenation obfuscation
sublimehigh
Attachment: HTML smuggling with decimal encoding
sublimehigh
Attachment: HTML smuggling with embedded base64-encoded executable
sublimehigh
Attachment: HTML smuggling with embedded base64-encoded ISO
sublimehigh
Attachment: HTML smuggling with eval and atob
sublimehigh
Attachment: HTML smuggling with eval and atob via calendar invite
sublimehigh
Attachment: HTML smuggling with excessive line break obfuscation
sublimehigh
Attachment: HTML smuggling with excessive string concatenation and suspicious patterns
sublimemedium
Attachment: HTML smuggling with fromCharCode and other signals
sublimehigh
Attachment: HTML smuggling with hex strings
sublimemedium
Attachment: HTML smuggling with high entropy and other signals
sublimehigh
Attachment: HTML smuggling with raw array buffer
sublimehigh
Attachment: HTML smuggling with RC4 decryption
sublimehigh
Attachment: HTML smuggling with ROT13
sublimehigh
Attachment: HTML smuggling with setTimeout
sublimehigh
Attachment: HTML smuggling with unescape
sublimehigh
Attachment: HTML with emoji-to-character map
sublimehigh
Attachment: HTML with hidden body
sublimehigh
Attachment: HTML with JavaScript functions for HTTP requests
sublimehigh
Attachment: ICS calendar file with base64 encoded recipient address in URL parameters
sublimehigh
Attachment: ICS calendar file with QR code containing recipient email address
sublimehigh
Attachment: ICS calendar file with suspicious product identifier
sublimemedium
Attachment: ICS calendar with embedded file from internal sender with SPF failure
sublimehigh
Attachment: ICS file with AWS Lambda URL
sublimemedium
Attachment: ICS file with excessive custom properties
sublimemedium
Attachment: ICS file with non-Gregorian calendar scale
sublimemedium
Attachment: ICS with embedded document
sublimelow
Attachment: ICS with embedded Javascript in SVG file
sublimehigh
Attachment: ICS with employee policy review lure
sublimehigh
Attachment: JavaScript file with suspicious base64-encoded executable
sublimehigh
Attachment: JPEG with gd-jpeg creator and suspicious file name
sublimehigh
Attachment: Legal themed message or PDF with suspicious indicators
sublimemedium
Attachment: Link file with UNC path
sublimemedium
Attachment: Link to Doubleclick.net open redirect
sublimemedium
Attachment: Macro files containing MHT content
sublimemedium
Attachment: Malformed OLE file
sublimehigh
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links
sublimehigh
Attachment: MS Office or RTF file with Shell.Explorer.1 com object with embedded LNK
sublimemedium
Attachment: MS OOXML file created by Administrator with zero edit time
sublimehigh
Attachment: MSI installer file
sublimemedium
Attachment: Office file contains OLE relationship to credential phishing page
sublimehigh
Attachment: Office file with credential phishing URLs
sublimemedium
Attachment: Office file with document sharing and browser instruction lures
sublimehigh
Attachment: Office file with suspicious function calls or downloaded file path
sublimehigh
Attachment: OLE external relationship containing file scheme link to executable filetype
sublimehigh
Attachment: OLE external relationship containing file scheme link to IP address
sublimehigh
Attachment: Password-protected PDF with fake document indicators
sublimemedium
Attachment: PDF Attachment with links to workers.dev
sublimemedium
Attachment: PDF file with low reputation link to ZIP file (unsolicited)
sublimemedium
Attachment: PDF file with low reputation links to suspicious filetypes (unsolicited)
sublimemedium
Attachment: PDF generated with wkhtmltopdf tool and default title
sublimelow
Attachment: PDF Object Hash - Encrypted PDFs with fake payment notification
sublimemedium
Attachment: PDF Object Hash associated with a fake invoice and a W-9
sublimehigh
Attachment: PDF Object Hash associated with fake Canada Revenue Agency documents
sublimemedium
Attachment: PDF Object Hash with Blue File Icon
sublimemedium
Attachment: PDF proposal with credential theft indicators
sublimehigh
Attachment: PDF with a suspicious string and single URL
sublimehigh
Attachment: PDF with embedded Javascript
sublimemedium
Attachment: PDF with JSFck obfuscation
sublimehigh
Attachment: PDF with link to DMG file download
sublimemedium
Attachment: PDF with link to zip containing a wsf file
sublimehigh
Attachment: PDF with localhost IP in EXIF title metadata
sublimemedium
Attachment: PDF with multistage landing - ClickUp abuse
sublimehigh
Attachment: PDF with password in filename matching body text
sublimemedium
Attachment: PDF with recipient email in link
sublimehigh
Attachment: PDF with ReportLab library and default metadata
sublimelow
Attachment: PDF with self-service platform links with self sender or blank recipients
sublimemedium
Attachment: PDF with split QR code
sublimemedium
Attachment: PDF with suspicious HeadlessChrome metadata
sublimemedium
Attachment: PDF with suspicious language and redirect to suspicious file type
sublimehigh
Attachment: PDF with suspicious link and action-oriented language
sublimehigh
Attachment: PDF with suspicious view document characteristics
sublimemedium
Attachment: Potential sandbox evasion in Office file
sublimehigh
Attachment: PowerPoint with suspicious hyperlink
sublimehigh
Attachment: Python generated PDF with link
sublimemedium
Attachment: QR code link with base64-encoded recipient address
sublimehigh
Attachment: QR code with encoded recipient targeting and redirect indicators
sublimehigh
Attachment: QR code with recipient targeting and special characters
sublimehigh
Attachment: QR code with suspicious URL patterns in EML file
sublimehigh
Attachment: QR code with userinfo portion
sublimehigh
Attachment: RFC822 containing suspicious file sharing language with links from untrusted sender
sublimemedium
Attachment: RTF file with suspicious link
sublimemedium
Attachment: RTF with embedded content
sublimemedium
Attachment: Self-sender PDF with minimal content and view prompt
sublimehigh
Attachment: SFX archive containing commands
sublimemedium
Attachment: Small text file with link containing recipient email address
sublimemedium
Attachment: Suspicious employee policy update document lure
sublimemedium
Attachment: Suspicious PDF created with headless browser
sublimehigh
Attachment: SVG file with HTML entity encoded href attributes
sublimemedium
Attachment: SVG file with hyperlinks and cursor styling
sublimemedium
Attachment: SVG files with evasion elements
sublimehigh
Attachment: TAR file with RAR type
sublimehigh
Attachment: Web files with suspicious comments
sublimehigh
Attachment: WinRAR CVE-2025-8088 exploitation
sublimehigh
Attachment: XLSX file with suspicious print titles metadata
sublimehigh
Attachment: ZIP file with CVE-2026-0866 exploit
sublimemedium
Base16 or Base32 Encoding/Decoding Activity
elasticmedium
Base64 Decoded Payload Piped to Interpreter
elastichigh
Base64 Encoded PowerShell Command Detected
sigmahigh
BEC with unusual reply-to or return-path mismatch
sublimehigh
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply
sublimemedium
Benefits enrollment impersonation
sublimehigh
Body HTML: Comment with 24-character hex token
sublimelow
Body HTML: Recipient SLD in HTML class
sublimemedium
Body: Embedded email headers indicative of thread hijacking/abuse
sublimemedium
Body: Fake secure email portal with HTML obfuscation
sublimehigh
Body: HTML whitespace stuffing with short initial message
sublimemedium
Body: Invisible Unicode obfuscation student loan callback phishing
sublimemedium
Body: Suspicious date format
sublimemedium
Body: Suspicious table template fingerprint
sublimemedium
Body: Yellow highlighted text markers
sublimelow
Brand impersonation: Coinbase with suspicious links
sublimemedium
Brand impersonation: DocuSign with embedded QR code
sublimehigh
Brand impersonation: File sharing notification with template artifacts
sublimelow
Brand impersonation: Microsoft logo in HTML with fake quarantine release notification
sublimehigh
Brand impersonation: Microsoft Planner with suspicious link
sublimemedium
Brand impersonation: QuickBooks notification from Intuit themed company name
sublimemedium
Brand Impersonation: ShareFile
sublimemedium
Brand impersonation: SharePoint PDF attachment with credential theft language
sublimemedium
Brand impersonation: Stripe notification
sublimemedium
Brand impersonation: Zoom
sublimemedium
Business Email Compromise (BEC) attempt with masked recipients and reply-to mismatch (unsolicited)
sublimemedium
Callback phishing via Adobe Sign comment
sublimehigh
Callback phishing via calendar invite
sublimemedium
Callback phishing via DocuSign comment
sublimehigh
Callback phishing via Intuit service abuse
sublimemedium
Callback phishing via Zelle Service Abuse
sublimemedium
Callback phishing via Zoho service abuse
sublimemedium
Callback phishing: Social Security Administration fraud
sublimemedium
Callback phishing: SumUp infrastructure abuse
sublimehigh
Canva design with suspicious embedded link
sublimehigh
Certificate Exported Via Certutil.EXE
sigmamedium
Cisco Secure Firewall - Lumma Stealer Activity
splunk_escu
Cisco Secure Firewall - Repeated Malware Downloads
splunk_escu
Cisco Secure Firewall - Snort Rule Triggered Across Multiple Hosts
splunk_escu
Command Line Obfuscation via Whitespace Padding
elasticmedium
Command Obfuscation via Unicode Modifier Letters
elastichigh
ConvertTo-SecureString Cmdlet Usage Via CommandLine
sigmamedium
Credential Phishing via Dropbox comment abuse
sublimemedium