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121.199.5.102 has a threat confidence score of 42%. This IP address from China (AS37963, Hangzhou Alibaba Advertising Co.,Ltd.) has been observed in 42 honeypot sessions targeting SIP, HTTPS, POSTGRES, HTTP, IMAP and 6 other protocols. First observed on February 26, 2026, most recently active March 28, 2026.
Identifies HTTP GET requests directly targeting the /bad-request path, indicating automated or manual probing of application error-handling routes rather than legitimate navigation flow.