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219.153.100.188 has a very high threat confidence level of 97%, originating from Shanghai, China, on the Chongqing Telecom network (134420). It has been observed across 46 sessions targeting SSH, with detected attack patterns including ssh authorized keys persistence established, First observed on March 6, 2026, most recently active March 10, 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.
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.