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191.250.153.18 has a threat confidence score of 88%. This IP address from Brazil (AS18881, TELEFONICA BRASIL S.A) has been observed in 12 honeypot sessions targeting SSH protocols. Detected attack patterns include ssh authorized keys persistence established. First observed on April 17, 2026, most recently active April 20, 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.