Yara-Scanner is a Python-based extension that integrates Yara scanning capabilities into Burp Suite for web application security testing. The tool enables security professionals to perform on-demand Yara scans of websites directly within the Burp Suite interface using custom Yara rules. Users can write their own rules or utilize existing ones to scan web content for specific patterns, strings, or signatures. Key functionality includes scanning spidered sites for obfuscated JavaScript code and identifying specific string patterns present in HTTP requests and responses. The extension processes web traffic captured by Burp Suite and applies Yara rules to detect potential security issues or indicators of compromise. The tool requires Jython standalone JAR file and Yara binary version 3.4 as prerequisites. It has been tested with both Burp Suite Free and Pro versions 1.6.3x on Windows 7, Windows 10, and Kali Linux 2.0 environments. Yara-Scanner bridges the gap between traditional Yara malware detection capabilities and web application security testing by bringing rule-based pattern matching to HTTP traffic analysis within the Burp Suite ecosystem.