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187.120.22.21 has a threat confidence score of 99%. This IP address from Brazil (AS266181, GOLDEN LINK) has been observed in 60 honeypot sessions targeting TELNET protocols. Detected attack patterns include telnet busybox shell activation with capability check. First observed on February 20, 2026, most recently active February 21, 2026.
Identifies a Telnet session where BusyBox is leveraged to activate or access a shell environment (sh, shell, system, linuxshell, enable) followed by command capability validation (ping). This pattern reflects deliberate shell breakout and execution-context validation commonly observed in IoT botnets and embedded Linux compromise workflows. The presence of multiple shell invocation variants combined with BusyBox applet usage indicates adaptive execution logic rather than incidental command usage.