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61.21.125.125 has a threat confidence score of 89%. This IP address from Japan (AS9824, JCOM Co., Ltd.) has been observed in 12 honeypot sessions targeting TELNET protocols. Detected attack patterns include telnet busybox hidden binary stager execution. First observed on January 29, 2026, most recently active February 18, 2026.
Identifies a Telnet session where BusyBox is used to construct a binary payload via echo redirection into a writable hidden file, followed by shell activation (sh, shell, system, linuxshell, enable), directory manipulation, and execution of the staged file. The combination of binary invocation, file creation through BusyBox redirection, hidden file usage, shell breakout, and connectivity validation (ping) indicates active payload staging and execution rather than simple reconnaissance. This pattern is strongly associated with embedded Linux and IoT malware deployment workflows.