Notable Threat
103.143.231.57 is a high-risk address linked to persistent SSH brute-force attacks and broader hacking activity, with automated honeypot sensors logging 240 reports within a single month and assigning it an overall threat level of 8/10.
The IP originates from Hong Kong and is routed through AS138152 under the operator YISU CLOUD LTD. Community and honeypot detections captured activity between February 2026 and February 2026, with the majority of reports attributed to SSH-targeted intrusion attempts. Of the logged threat categories, SSH-related activity dominated alongside general hacking probes. The 20 automated honeypot sensors that contributed reports paint a clear picture of sustained, automated scanning behaviour emanating from this address rather than isolated opportunistic traffic. The confidence score of 94% reflects strong corroboration across detection sources, while the activity frequency rating of 8/10 confirms this is not a transient issue but an ongoing campaign.
The dominant threat category involves systematic attempts to gain unauthorized access to servers by exploiting the SSH protocol. Attackers use credential-guessing tools that automate the process of testing common username-password combinations against exposed SSH services. This technique remains one of the most prevalent initial access vectors because many servers still rely on password-based authentication or weak credential policies. Successful compromise of an SSH service can grant attackers a foothold for data exfiltration, lateral movement within networks, or deployment of secondary payloads.
Site operators should immediately audit their SSH configurations and enforce key-based authentication as the primary login method, disable root login over SSH, and consider changing the default listening port to reduce automated scanning exposure. Implementing automated abuse-detection tools such as fail2ban can dynamically block IP addresses that exceed failed-login thresholds. Restricting SSH access to known trusted IP ranges via firewall rules or network-level access control lists adds an additional hardening layer. Regular monitoring of authentication logs for unusual source IPs or anomalous login patterns remains essential for early threat detection.
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