Full Report
Authored By Anuradha McAfee Labs has recently observed a new wave of phishing attacks. In this wave, the attacker has... The post New Wave of SHTML Phishing Attacks appeared first on McAfee Blog.
Analysis Summary
The provided article snippet primarily contains navigation and marketing information for McAfee products and services and does not detail specific malware families, attack tools, or technical TTPs related to SHTML phishing attacks suitable for structured malware analysis documentation.
However, based *only* on the title suggesting the topic, the techniques related to "SHTML Phishing Attacks" can be summarized generically within the requested framework.
# Tool/Technique: SHTML Phishing Attack Mechanism
## Overview
This refers to a phishing technique that leverages the Server-Side Include (SHTML) directive, typically to serve malicious or deceptive content, often disguised within seemingly legitimate web pages or emails that support SHTML interpretation. The goal is usually credential harvesting, malware distribution, or session hijacking.
## Technical Details
- Type: Technique (Phishing/Web Compromise)
- Platform: Web servers supporting SHTML directives (often Apache/IIS configurations), targeting end-user web browsers.
- Capabilities: Document includes, redirection, potential client-side script execution via content injection.
- First Seen: Dependent on the specific implementation, but SHTML injection/misuse has been known for many years.
## MITRE ATT&CK Mapping
- TA0001 - Initial Access
- T1566 - Phishing
- T1566.002 - Spearphishing Link (If used via email directing users to the SHTML page)
- T1190 - Exploit Public-Facing Application (If the SHTML vulnerability is due to server misconfiguration or underlying vulnerability)
## Functionality
### Core Capabilities
- Utilizing server directives (like SSI) to dynamically load content into an HTML page.
- Creating deceptive login pages embedded within the SHTML structure.
### Advanced Features
- Obfuscation: The malicious payload or redirect link might be obscured within comments or unusual SHTML syntax to bypass basic email/web filters.
- Blurred Imagery: As suggested by the article URL fragments, advanced social engineering may involve techniques like embedding blurred images to draw user focus to sensitive input fields.
## Indicators of Compromise
- File Hashes: N/A (Technique dependent)
- File Names: N/A (Technique dependent)
- Registry Keys: N/A
- Network Indicators: Malicious C2 servers or credential harvesting endpoints referenced within the injected SHTML content (defanged example: `hxxp://malicious-login-site[.]com`).
- Behavioral Indicators: Browser navigation to unexpected or highly suspicious URLs following a click, or submission of credentials to non-official domains.
## Associated Threat Actors
- Various groups utilize phishing techniques, including common financial fraud actors (e.g., Emotet affiliates sometimes use advanced delivery methods, though SHTML is an older web-based concept). Specific actors are not detailed in the context provided.
## Detection Methods
- Signature-based detection: Signatures targeting known SHTML parsing vulnerabilities or specific known malicious resource includes.
- Behavioral detection: Monitoring unusual HTTP requests originating from seemingly benign web pages or analyzing form submissions to external, unrecognized domains.
- YARA rules: Not typically applicable for a web-based technique unless used to detect specific malicious files delivered via the technique.
## Mitigation Strategies
- Prevention measures: Deploying advanced email/web filtering solutions; ensuring web servers are correctly configured to prevent unauthorized or malicious Server-Side Include execution (e.g., restricting parsing to specific file extensions or disabling SSI entirely if not required).
- Hardening recommendations: Implementing strong user training regarding suspicious links and credential entry; utilizing multi-factor authentication (MFA) everywhere possible.
## Related Tools/Techniques
- Standard HTML Phishing Pages
- Cross-Site Scripting (XSS) (Often leveraged during injection phases in similar attacks)
- Web Shells (If the SHTML vulnerability allows upload or execution capabilities)