On Stock Kali 2.0 (after apt-get upgrade), the following command errors ./egghunter.rb --list-formats. Adding the require 'msfenv' to the file alleviates the issue.
root@kali:/usr/share/metasploit-framework/tools/exploit# ./egghunter.rb --list-formats
/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- rkelly (LoadError)
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/rex/proto/http/response.rb:5:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/rex/proto/http.rb:4:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/rex/proto.rb:2:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/rex.rb:79:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/msf/core.rb:17:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/share/metasploit-framework/lib/msf/base.rb:17:in `<top (required)>'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from ./egghunter.rb:9:in `<main>'
If you do patch test/analysis/diffing, you might find this tool
handy. This tool will automatically extract all the *.msu files,
and then you can search for the patched files you're looking for
quickly.
The workflow would be something like this:
1. You download the patches from:
http://mybulletins.technet.microsoft.com/BulletinPages/Dashboard
2. You put all the *.msu files in one directory.
3. Run this tool: extract_msu.bat [path to *.msu files]
4. The tool should extract the updates. After it's done, you can
use Windows to search for the file(s) you're looking for.