Hashkill is an opensource hash cracker for Linux that uses OpenSSL. Currently it supports 3 attack methods (dictionary, bruteforce, hybrid) and has 16 plugins for different types of hashes (md5, sha1, phpbb3, mysql, md5 (unix), des(unix), sha(unix), vbulletin, smf, etc). It is multithreaded and supports session save/restore.
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