SOC166 Walkthrough: XSS Attack from Malicious Chinese IP Blocked on Company Server

A cross-site scripting (XSS) attack was detected after JavaScript 'script' and 'alert' code was found embedded in a requested URL. The source IP address was traced to a Chinese internet service provider and flagged as malicious on both VirusTotal and AbuseIPDB, while the destination IP belonged to a corporate network. Log analysis revealed eight requests from the attacker to the same destination at the time of the incident, with seven returning HTTP 200 responses and the final one returning a 302 status, indicating the attack ultimately failed. No planned security tests were found in the Email Security section, ruling out an authorized simulation. As a precaution, the WebServer1002 endpoint was isolated to prevent any potential further damage.