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5.223.57.13 has a threat confidence score of 98%. This IP address from Singapore (AS215859, Hetzner Online GmbH) has been observed in 79 honeypot sessions targeting SSH protocols. Detected attack patterns include ssh authorized keys persistence established. First observed on February 6, 2026, most recently active February 23, 2026.
Removal of filesystem attribute protections from the user’s .ssh directory followed by deletion and recreation of the directory and insertion of a new public key into authorized_keys. This pattern reflects deliberate modification of SSH trust configuration to establish persistent key-based access.