Reverse HTTPS Handler Checker

handlercheck.rb

#!/usr/bin/env ruby

require 'net/smtp'

def issue_alert
    thetimeitfailed = Time.now
    message = <<MESSAGE_END
From: HANDLERCHECKIN <root@metasploithandler>
To: Rob Fuller <mubix@hak5.org>
Subject: Handler Checkin

The handler failed at #{thetimeitfailed}
MESSAGE_END

    Net::SMTP.start('localhost') do |smtp|
    smtp.send_message message, 'root@metasploithandler', 
                                 'mubix@hak5.org'
    end
    puts "[-] Handler failed at #{thetimeitfailed}"
end

def do_test
    result = %x[timeout 3 openssl s_client -showcerts -connect MyHandlerIPAddressHere:443 2>&1]
    if result =~ /MetasploitCertificateOutputRegexHere/
        print "[*] Handler still active - #{Time.now}\r"
        $stdout.flush
        return true
    else
        issue_alert
        return false
    end
end


test = true
puts "[*] Beginning Test..."
loop do
    test = do_test
    break if test == false
    select(nil,nil,nil,5)
end