DNS迭代穷举脚本
在普通的DNS穷举中，如果使用字典进行穷举，会发现没有哪个字典能穷举完所有的域名，国外安全研究者在常年累月的DNS记录收集中发现，很多域名有大量的短主机名，并且很易记，通常为4个字符或更少，所以有了以下脚本：
#!/usr/bin/env ruby
#
## Brute code stolen form: #
@domain = 'microsoft.com'
def result?(sub)
results = %x(dig +noall #{sub}.#{@domain} +answer)
if results != ""
puts "============================"
puts "FOUND: \t#{sub}"
puts "============================"
puts "#{results}"
puts "============================"
end
1 == 2
end
def crack_yielding(chars)
crack_yield(chars){ |p|
return p if result?(p)
}
end
def crack_yield(chars)
chars.each { |c| yield c }
crack_yield(chars) { |c|
chars.each do |x|
yield c + x
end
}
end
chars = ('a'..'z').to_a(0..9).each {|x| chars << x.to_s}
crack_yielding(chars)gist: https://gist.github.com/mubix/9107284
它能正常运行，但是速度比较慢，所以进行了改进。
#!/usr/bin/env ruby
#
## Brute code stolen form: #
def result?(sub)
puts sub
1 == 2
end
def crack_yielding(chars)
crack_yield(chars){ |p|
return p if result?(p)
}
end
def crack_yield(chars)
chars.each { |c| yield c }
crack_yield(chars) { |c|
chars.each do |x|
yield c + x
end
}
end
chars = ('a'..'z').to_a(0..9).each {|x| chars << x.to_s}
crack_yielding(chars)开始使用
ruby brutelist.rb | parallel -j100 dig +noall {}.microsoft.com +answer工作回显如下所示：
c.microsoft.com. 2 IN CNAME c.microsoft.akadns.net.
c.microsoft.akadns.net. 499 IN A 65.55.58.184
e.microsoft.com. 3599 IN A 191.234.1.50
g.microsoft.com. 2798 IN CNAME g.msn.com.
g.msn.com. 99 IN CNAME g.msn.com.nsatc.net.
g.msn.com.nsatc.net. 148 IN A 131.253.34.154
i.microsoft.com. 779 IN CNAME i.toggle.www.ms.akadns.net.
i.toggle.www.ms.akadns.net. 44 IN CNAME i.g.www.ms.akadns.net.
i.g.www.ms.akadns.net. 225 IN CNAME i.microsoft.com.edgesuite.net.
i.microsoft.com.edgesuite.net. 116 IN CNAME a1475.g.akamai.net.
a1475.g.akamai.net. 16 IN A 23.45.65.26
a1475.g.akamai.net. 16 IN A 23.45.65.33
m.microsoft.com. 3599 IN CNAME origin.mobile.ms.akadns.net.
origin.mobile.ms.akadns.net. 299 IN A 65.55.186.235
s.microsoft.com. 3599 IN CNAME reroute.microsoft.com.
reroute.microsoft.com. 3599 IN A 65.55.58.201
reroute.microsoft.com. 3599 IN A 64.4.11.37
cs.microsoft.com. 81 IN CNAME wedcs.trafficmanager.net.
wedcs.trafficmanager.net. 7 IN CNAME wedcseus.cloudapp.net.
wedcseus.cloudapp.net. 8 IN A 137.116.48.250
...
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