Critical Alert
IP 187.33.155.52 is a high-risk address originating from Spain that has been flagged by automated honeypot sensors with a critical threat level of 10/10, accumulating 444 total abuse reports since August 2025. The dominant threat activity consists of SSH brute-force attempts, representing the majority of recent detected incidents alongside general hacking probes.
The IP 187.33.155.52 is registered to Cloudi Nextgen Sl under ASN AS49635 in Spain, with detection sourced from 20 automated honeypot sensors reporting both hacking intrusion attempts and SSH brute-force activity. The threat categories break down as 14 general hacking probes and 6 SSH-focused incidents, indicating a dual-vector approach to unauthorized access. All reported activity occurred within the August 2025 window, suggesting a concentrated campaign rather than distributed opportunistic scanning. Despite the 59% confidence score, the volume of reports and consistent threat pattern demonstrate a persistent attacker infrastructure targeting exposed SSH services.
SSH brute-force attacks represent a direct pathway to server compromise through systematic credential guessing. Attackers leverage automated tooling to cycle through common username-password combinations, exploiting weak or default credentials on publicly accessible SSH daemons. Once successful, an attacker can establish persistent shell access, pivot laterally within networks, deploy additional malicious payloads, or exfiltrate sensitive data. The combination of general hacking probes alongside SSH attacks suggests this IP participates in broader scanning campaigns designed to identify and exploit multiple vulnerability vectors across target infrastructure.
Organizations with exposed SSH services should implement immediate defensive measures against this threat profile. Deploying fail2ban or equivalent intrusion prevention tools to automatically blacklist IPs after repeated authentication failures provides critical automated defense. Switching to key-based authentication exclusively, disabling root login, and considering non-standard SSH port allocation significantly raises the barrier for automated attacks. Regular audit of authentication logs combined with prompt patching of SSH daemons ensures early detection of compromise attempts and reduces exposure to known vulnerabilities.
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