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42.51.41.137 has a threat confidence score of 100%. This IP address from China (AS56005, Zhengzhou Fastidc Technology Co.,Ltd.) has been observed in 746 honeypot sessions targeting SSH protocols. Detected attack patterns include ssh authorized keys persistence established, ssh automated post compromise recon and persistence chain, ssh interactive environment profiling with access consolidation. First observed on January 20, 2026, most recently active April 12, 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.
Identifies an SSH session performing comprehensive automated host reconnaissance (CPU, memory, disk, processes, users), followed by credential modification and SSH key manipulation consistent with scripted post-compromise takeover and persistence establishment.
Identifies an SSH session performing multi-method system profiling (CPU model extraction, memory and disk inspection, active user/process monitoring), followed by SSH key replacement and password update indicative of interactive access validation and consolidation rather than single-shot automated takeover.
Attempts to remove filesystem attribute protections (e.g., immutable flags via chattr -i/-a) from the user’s ~/.ssh directory. This pattern indicates preparatory activity to modify SSH trust configuration, commonly preceding insertion or replacement of authorized_keys for persistence.