mirror of
https://github.com/rapid7/metasploit-framework
synced 2024-11-12 11:52:01 +01:00
114 lines
2.6 KiB
Ruby
Executable File
114 lines
2.6 KiB
Ruby
Executable File
#!/usr/bin/env ruby
|
|
#
|
|
# This script cracks a half-lm challenge/response hash that uses a
|
|
# a static challenge key. The idea is you use rainbow tables to
|
|
# crack the first 7 chars and this script to complete a few remaining.
|
|
# If the password is longer than 10 characters, this script will fail.
|
|
#
|
|
|
|
msfbase = File.symlink?(__FILE__) ? File.readlink(__FILE__) : __FILE__
|
|
$:.unshift(File.join(File.dirname(msfbase), '..', 'lib'))
|
|
|
|
require 'rex'
|
|
|
|
def usage
|
|
$stderr.puts("\n" + " Usage: #{$0} <options>\n" + $args.usage)
|
|
exit
|
|
end
|
|
|
|
def try(word)
|
|
buf = ::Rex::Proto::SMB::Crypt.lanman_des(word, "\x11\x22\x33\x44\x55\x66\x77\x88")
|
|
buf.unpack("H*")[0]
|
|
end
|
|
|
|
hash = pass = nil
|
|
|
|
$args = Rex::Parser::Arguments.new(
|
|
"-n" => [ true, "The encypted LM hash to crack" ],
|
|
"-p" => [ true, "The decrypted LANMAN password for bytes 1-7" ],
|
|
"-h" => [ false, "Display this help information" ])
|
|
|
|
|
|
$args.parse(ARGV) { |opt, idx, val|
|
|
case opt
|
|
when "-n"
|
|
hash = val
|
|
when "-p"
|
|
pass = val
|
|
when "-h"
|
|
usage
|
|
else
|
|
usage
|
|
end
|
|
}
|
|
|
|
if (not (hash and pass))
|
|
usage
|
|
end
|
|
|
|
if(hash.length != 48)
|
|
$stderr.puts "[*] LANMAN should be exactly 48 bytes of hexadecimal"
|
|
exit
|
|
end
|
|
|
|
if(pass.length != 7)
|
|
$stderr.puts "[*] Cracked LANMAN password should be exactly 7 characters"
|
|
exit
|
|
end
|
|
|
|
pass = pass.upcase
|
|
hash = hash.downcase
|
|
|
|
cset = [*(1..255)].pack("C*").upcase.unpack("C*").uniq
|
|
|
|
stime = Time.now.to_f
|
|
puts "[*] Trying one character..."
|
|
0.upto(cset.length-1) do |c1|
|
|
test = pass + cset[c1].chr
|
|
if(try(test) == hash)
|
|
puts "[*] Cracked: #{test}"
|
|
exit
|
|
end
|
|
end
|
|
etime = Time.now.to_f - stime
|
|
|
|
puts "[*] Trying two characters (eta: #{etime * cset.length} seconds)..."
|
|
0.upto(cset.length-1) do |c1|
|
|
0.upto(cset.length-1) do |c2|
|
|
test = pass + cset[c1].chr + cset[c2].chr
|
|
if(try(test) == hash)
|
|
puts "[*] Cracked: #{test}"
|
|
exit
|
|
end
|
|
end
|
|
end
|
|
|
|
puts "[*] Trying three characters (eta: #{etime * cset.length * cset.length} seconds)..."
|
|
0.upto(cset.length-1) do |c1|
|
|
0.upto(cset.length-1) do |c2|
|
|
0.upto(cset.length-1) do |c3|
|
|
test = pass + cset[c1].chr + cset[c2].chr + cset[c3].chr
|
|
if(try(test) == hash)
|
|
puts "[*] Cracked: #{test}"
|
|
exit
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
puts "[*] Trying four characters (eta: #{etime * cset.length * cset.length * cset.length} seconds)..."
|
|
0.upto(cset.length-1) do |c1|
|
|
0.upto(cset.length-1) do |c2|
|
|
0.upto(cset.length-1) do |c3|
|
|
0.upto(cset.length-1) do |c4|
|
|
test = pass + cset[c1].chr + cset[c2].chr + cset[c3].chr + cset[c4].chr
|
|
if(try(test) == hash)
|
|
puts "[*] Cracked: #{test}"
|
|
exit
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|