Cross-Site Scripting (XSS) is a type of attack in which malicious scripts are injected into trusted websites. In XSS attacks, an attacker uses a benign web application to send malicious code, generally in the form of a browser-side script. This detection rule identifies the potential malicious executions of such browser-side scripts.

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Monitors for a sequence of network activity on atypical ports, prior to receiving a single packet on such a non-standard port, which potentially indicates signal port knocking activity. Port knocking is a covert method of externally opening ports by sending a sequence of packets to previously closed ports, which adversaries may leverage to discreetly gain access without directly alerting traditional monitoring systems.

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