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121.36.81.57 has a threat confidence score of 93%. This IP address from China (AS55990, Huawei Cloud Service data center) has been observed in 9 honeypot sessions and reported 1 times targeting SSH protocols. Detected attack patterns include ssh authorized keys persistence established. First observed on March 25, 2026, most recently active March 26, 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.
| Reporter | Date | Category | Protocol | Comment |
|---|---|---|---|---|
| Anonymous | Mar 26, 2026, 03:54 | Brute Force | SSH | — |