Maximum Danger
IP address 185.156.73.233 is a critical-risk address operating from Ukraine that has been definitively linked to persistent SSH brute-force intrusion activity, with 439 independent abuse reports filed across a nine-month observation window and a threat score of 10 out of 10. The address is registered to FOP Dmytro Nedilskyi under ASN AS211736 and exhibits an extremely high activity frequency rating of 8 out of 10, indicating near-continuous malicious operations against exposed network endpoints.
Security monitoring systems logged this IP through 20 separate automated honeypot sensors between September 2025 and June 2026, generating 439 total reports that overwhelmingly document SSH-targeted attacks. The dominant threat profile breaks down as follows: Hacking attempts (19 reports), SSH brute-force activity (17 reports), and Exploited Host indicators (2 reports). Suricata detection signatures specifically identified the address repeatedly attempting to establish SSH sessions on standard ports, consistent with automated credential-guessing campaigns. The 76 percent confidence score reflects the strong evidentiary basis for attributing malicious intent, while the near-monthly report volume demonstrates sustained, organized targeting rather than opportunistic scanning.
SSH brute-force attacks represent one of the most common initial-access vectors employed against internet-facing Linux servers and network appliances. Attackers leverage automated tooling to cycle through username and password combinations at scale, exploiting weak or default credentials to gain unauthorized shell access. Once inside a target environment, threat actors typically establish persistence, deploy additional payloads, and use the compromised host as a pivot point for lateral movement or data exfiltration. The two Exploited Host category reports suggest this IP may simultaneously function as an already-compromised system being weaponized for further attacks, amplifying its risk profile considerably.
Network defenders should treat 185.156.73.233 as a hostile source and block all inbound SSH traffic from this address at the network perimeter immediately. Organizations running publicly accessible SSH services should enforce key-based authentication exclusively, disable root login, and implement automated blocking tools such as fail2ban or similar rate-limiting solutions to absorb credential-stuffing volume. Exposed SSH daemons should be relocated to non-standard ports where feasible, and operators should audit existing accounts for weak or duplicate passwords. Hosting providers and network owners associated with AS211736 should be notified that address 185.156.73.233 appears to be conducting systematic unauthorized access attempts against global infrastructure.
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