Hydra v6.3 Released with oracle & snmp-enum modules! New Oracle module (for databases via OCI, for TNS Listener passwd, for SID enumeration) New SMTP userenum module (using VRFY, EXPN or RCPT command) Memory leak fix for -x bruteforcing option reported by Alex Lau. New modules are easy to add, beside that, it is flexible and very fast. Hydra is a parallized login cracker which supports numerous protocols to attack.
Source: https://thehackernews.com/2011/04/hydra-v63-released-with-oracle-snmp.html