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121.4.84.36 has a threat confidence score of 89%. This IP address from China (AS45090, Shenzhen Tencent Computer Systems Company Limited) has been observed in 10 honeypot sessions targeting TELNET protocols. Detected attack patterns include telnet shell breakout with busybox payload execution. First observed on March 21, 2026, most recently active March 21, 2026.
Telnet session exhibiting privilege escalation and shell breakout attempts (enable, system, linuxshell, shell, sh) followed by execution of /bin/busybox with a non-standard or arbitrary applet name. The combination indicates an automated attempt to escape restricted CLI environments and execute a staged or randomly named payload via BusyBox. This pattern is characteristic of IoT/Linux bot deployment frameworks leveraging BusyBox as a universal execution wrapper.