The source to the modified rsh program is in the directory /usr/local/src/rsh.
The specially modified rshd program is installed in /usr/etc/in.rshd. (the original one is in /usr/etc/in.rshd.ORIG)
The sources to the other commands are in /usr/local/src/anon-rcp and its subdirectories. The subdirectories ls, shell, and rcp contain the sources to anon-ls, anon-shell, and anon-rcp. These are installed in anon, which is currently /usr/local/homes/anon.
Logs of transactions are currently kept in /var/adm/anon-rcp-log.