Threatcheck.sh - Windows Defender Threat Intelligence

Detection strings help developers understand why their legitimate code triggered a security alert. By identifying which specific patterns or behaviors Defender detects, you can modify your code to avoid false positives while maintaining functionality. This is essential for legitimate tools, security software, and legitimate utilities that might have detection overlap with malware.

Use the full CARO-formatted threat name (e.g., Trojan:MSIL/Solorigate.BR!dha) when possible to get the most detailed threat classification including malware type, platform, family, variant, and detection method.

YARA rules are portable detection rules that can be used across different analysis tools and platforms beyond Windows Defender. By converting Defender's signatures to YARA format, security researchers can hunt for similar threats in samples, file systems, and security tools like YARA scanners, VirusTotal, and other threat intelligence platforms.

Detection strings are the static patterns, file signatures, or behavioral indicators that Defender's engine matches against. These can be byte sequences, API calls, registry keys, or code patterns. Understanding these strings helps analysts reverse-engineer detection logic and determine if an alert is legitimate or a false positive.

Yes, results are cached for faster subsequent lookups. This improves performance and reduces analysis time for commonly searched threats. If a threat has been analyzed before, you'll get instant results without needing verification.

Absolutely. During incident response, quickly understanding detected threat signatures helps you determine the scope of compromise, identify indicators of compromise (IOCs), generate YARA rules for hunting, and communicate findings to your security team. The hash samples section tracks where samples of this threat have been found.

No, this is not official Microsoft information, but a third-party analysis tool that parses CARO naming conventions and reverse-engineers Windows Defender definition files. Use at your own risk and always verify findings with official Microsoft resources for critical security decisions.