Module 4 Password Cracking

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Presentation transcript:

Module 4 Password Cracking Presented by Heorot.net Module 4 Password Cracking

Objectives Understand abilities and limitations of password cracking Identify different password encryption methods Identify and use password cracking tools

Abilities and Limitations Your ability to crack the password is only as good as your password list Complex passwords require more time to crack Remote cracking is slow and very noisy

Identify Encryption Methods Passwords are one-way encryptions *nix uses DES (wait!!! DES is NOT a hash!!!) /etc/shadow Windows uses MD5 %systemroot%system32%config Example (pw=“password”): Linux: $1$3I90ScF1$rSx/Pn/jQq12DMvMoUwbB0 Windows: 5f4dcc3b5aa765d61d8327deb882cf99

Identify Encryption Methods Passwords are used within applications as well Salt (pw = “password”) Linux: (both are the same) $1$3I90ScF1$rSx/Pn/jQq12DMvMoUwbB0 $1$7TKzgLz8$2NXCd7bIwF6lAV/wvejm.

Identify Encryption Methods Different Encryptions: WEP: 70617373776f7264 MD5: 5f4dcc3b5aa765d61d8327deb882cf99 SHA1: 5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8 SHA256: b109f3bbbc244eb82441917ed06d618b9008dd09b3befd1b5e07394c706a8bb980b1d7785e5976ec049b46df5f1326af5a2ea6d103fd07c95385ffab0cacbc86 ROT13: cnffjbeq So many other implementations

Password Tools How to crack passwords Brute Force Lookup

Password Tools How to crack passwords Brute Force Lookup Online: Hydra Offline: JTR Lookup Rainbow Tables Google Default passwords Hash Values

Password Tools Dictionaries Be ready to give up Ability to crack passwords is only as good as your dictionary Try to concentrate on commonly used words Sports teams (especially winning ones) Industry terminology Be ready to give up Complex passwords are difficult Remember, this isn’t the movies Best luck is with default passwords

Conclusion Understand abilities and limitations of password cracking Identify different password encryption methods Identify and use password cracking tools