libssh2 Linkage Reconnaissance - ldd/strings/readelf/nm Scanning for Vulnerable Targets
Detects reconnaissance activities targeting binaries or modules containing libssh2 library references or specific PHP symbol offsets (e.g., zend_execute_internal, zif_system). This rule monitors for common administrative and debugging tools like ldd, strings, readelf, and nm being used to scan files for sensitive symbols or version information, as well as specific PHP enumeration patterns and validation script executions, which are commonly associated with the triage process for CVE-2026-55200.
Microsoft Sentinel (KQL)
