Answers

Great! It's an open telnet connection! What welcome message do we receive? skidy's backdoor

Let's try executing some commands, do we get a return on any input we enter into the telnet session? (Y/N) N

Do we receive any pings? Note, you need to preface this with .RUN (Y/N) Y

What word does the generated payload start with? mkfifo

What would the command look like for the listening port we selected in our payload? nc -lvp 4444

Success! What is the contents of flag.txt? THM{y0u_g0t_th3_t3ln3t_fl4g}