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Hidden ball 5:
Solution
we scan the challenge server for open ports
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$ nmap challenges.hackvent.hacking-lab.com
Starting Nmap 7.01 ( https://nmap.org ) at 2017-12-06 22:59 CET
Nmap scan report for challenges.hackvent.hacking-lab.com (80.74.140.188)
Host is up (0.56s latency).
rDNS record for 80.74.140.188: urb80-74-140-188.ch-meta.net
Not shown: 996 filtered ports
PORT STATE SERVICE
22/tcp open ssh
23/tcp open telnet
80/tcp closed http
443/tcp closed https
Nmap done: 1 IP address (1 host up) scanned in 67.94 seconds
so, there’s a telnet service running, we connect, and are greeted by Santa:
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$ telnet challenges.hackvent.hacking-lab.com
__.----.
_.' '-.
/ _____ '-.
/_.-"" ""-._ \ HO, HO, HO...
." _......._ ". \
; .-' _ ))) _ '-. ; |
'/ ." _ _ ". \'. /
_| .-.^ ) ^.-. |_ \/-.
\ '"==-.(_).-=="' // \
'.____.-^-.____.' \ /
| ( - ) | '--'
\ /
_________\_________/_______________________________________________
He keeps talking for a minute, and then gives us the flag
Flag
HV17-UH4X-PPLE-ANND-IH4X-T1ME