Critical Alert
IP 120.48.175.69 is a maximum-threat-level address originating from Beijing Baidu Netcom Science and Technology Co., Ltd. in China, persistently engaged in SSH brute-force attacks against exposed servers. The IP has accumulated 856 abuse reports from 20 distinct automated honeypot sensors over approximately six months, with a concentration of recent activity focused on credential-guessing campaigns targeting SSH services. Despite a moderate activity frequency score, the sheer volume of reports combined with the highest possible threat rating makes this address a clear danger to any publicly accessible SSH daemon.
Detection data from honeypot infrastructure reveals a consistent pattern of automated SSH brute-force attempts emanating from this address. Fail2ban sensors recorded multiple violation batches—28, 25, and 27 incidents respectively—all classified as SSH brute-force attacks against sshd services. Suricata alerts corroborate this activity, flagging TCP invalid checksum anomalies alongside direct SSH brute-force indicators and an observed SSH session in progress on an expected port. The reported categories span SSH attacks, general hacking intrusion attempts, and notably one classification of exploited host, suggesting the attacking infrastructure may itself be partially compromised and operating without its owner's knowledge. The 68% confidence score reflects some uncertainty in attributing all observed behaviour patterns to intentional malicious activity versus automated scanning.
SSH brute-force attacks represent one of the most prevalent and effective initial access vectors used by threat actors to compromise Linux and Unix servers. By systematically guessing common username and password combinations, attackers using this technique seek to obtain valid shell access, after which they typically deploy backdoors, cryptocurrency miners, or pivot further into victim networks. The real-world risk is concrete: a successfully compromised SSH server grants attackers root-level control, enabling data theft, lateral movement, and complete infrastructure takeover. Even failed attempts consume server resources and generate authentication logs that can obscure genuine traffic or fill disk partitions if sustained at volume.
Site operators should block IP 120.48.175.69 at the firewall or network perimeter immediately and monitor for any subsequent attempts from adjacent address space. Implementing key-based authentication exclusively while disabling password authentication entirely eliminates the effectiveness of brute-force campaigns. Deploying tools such as fail2ban to dynamically ban repeated offenders and relocating SSH from port 22 to a non-standard port significantly reduces exposure. Regular auditing of authentication logs, enforced strong passphrase policies, and prompt application of SSH server security patches further harden defences against this category of attack.
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