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87.54.53.67 has a threat confidence score of 95%. This IP address from Denmark (AS3292, TDC Holding A/S) has been observed in 19 honeypot sessions targeting SSH protocols. Detected attack patterns include ssh hardened host profiling and shell rc immutability bypass. First observed on March 19, 2026, most recently active March 19, 2026.
Identifies SSH post-auth activity combining resilient multi-source CPU enumeration (explicit /usr/bin/nproc fallback) with removal of the immutable flag from ~/.shellrc via chattr, indicating host profiling followed by shell configuration tampering for persistence preparation.