mirror of
https://github.com/rapid7/metasploit-framework
synced 2024-11-12 11:52:01 +01:00
77 lines
1.7 KiB
Ruby
Executable File
77 lines
1.7 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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#
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# This script cracks a NTLM hash based on the case-insensitive LANMAN password
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# Credit to Yannick Hamon <yannick.hamon[at]xmcopartners.com> for the idea/perl code
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#
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msfbase = File.symlink?(__FILE__) ? File.readlink(__FILE__) : __FILE__
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$:.unshift(File.join(File.dirname(msfbase), '..', 'lib'))
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require 'rex'
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def usage
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$stderr.puts("\n" + " Usage: #{$0} <options>\n" + $args.usage)
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exit
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end
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ntlm = pass = nil
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chal = false
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@challenge = "\x11\x22\x33\x44\x55\x66\x77\x88"
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$args = Rex::Parser::Arguments.new(
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"-n" => [ true, "The encypted NTLM hash to crack" ],
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"-p" => [ true, "The decrypted LANMAN password" ],
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"-c" => [ false, "Use NTLM Challenge hashes" ],
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"-h" => [ false, "Display this help information" ])
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$args.parse(ARGV) { |opt, idx, val|
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case opt
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when "-n"
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ntlm = val
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when "-p"
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pass = val
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when "-c"
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chal = true
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when "-h"
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usage
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else
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usage
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end
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}
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if (not (ntlm and pass))
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usage
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end
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if (chal)
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if(ntlm.length != 48)
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$stderr.puts "[*] NTLM Challenge should be exactly 48 bytes of hexadecimal"
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exit
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end
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else
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if(ntlm.length != 32)
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$stderr.puts "[*] NTLM should be exactly 32 bytes of hexadecimal"
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exit
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end
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end
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if(pass.length > 14)
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$stderr.puts "[*] LANMAN password should be between 1 and 14 characters"
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exit
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end
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if(chal)
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done = Rex::Proto::SMB::Crypt.lmchal2ntchal(pass, [ntlm].pack("H*"),@challenge)
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else
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done = Rex::Proto::SMB::Crypt.lm2nt(pass, [ntlm].pack("H*"))
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end
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if(done)
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puts "[*] Cracked: LANMAN=#{pass} NTLM=#{done}"
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else
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puts "[*] Failed to crack password (incorrect input)"
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end
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