You should note that the SSH key has been changed.
$ dsocks.sh ssh level01@ctf.stri.pe
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
74:67:32:4a:04:b8:9f:05:b6:e8:29:43:26:12:75:11.
Please contact your system administrator.
Add correct host key in /home/jcr/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/jcr/.ssh/known_hosts:8
RSA host key for ctf.stri.pe has changed and you have requested strict checking.
Host key verification failed.
It may be something harmless/simple like round-robin DNS combined with a failure to replicate the key, or more likely, someone has rooted the box.
EDIT: As confirmed by gdb and ab below, there's a good reason for the key change.
EDIT: As confirmed by gdb and ab below, there's a good reason for the key change.