class Rex::Post::Meterpreter::Extensions::Sniffer::Sniffer

This meterpreter extension can be used to capture remote traffic

Public Class Methods

new(client) click to toggle source
Calls superclass method Rex::Post::Meterpreter::Extension::new
# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 19
def initialize(client)
  super(client, 'sniffer')

  client.register_extension_aliases(
    [
      {
        'name' => 'sniffer',
        'ext'  => self
      },
    ])
end

Public Instance Methods

capture_dump(intf) click to toggle source

Buffer the current capture to a readable buffer

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 91
def capture_dump(intf)
  request = Packet.create_request('sniffer_capture_dump')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  response = client.send_request(request, 3600)
  {
    :packets => response.get_tlv_value(TLV_TYPE_SNIFFER_PACKET_COUNT),
    :bytes   => response.get_tlv_value(TLV_TYPE_SNIFFER_BYTE_COUNT),
    :linktype => response.get_tlv_value(TLV_TYPE_SNIFFER_INTERFACE_ID) || 1,
  }
end
capture_dump_read(intf, len=16384) click to toggle source

Retrieve the packet data for the specified capture

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 103
def capture_dump_read(intf, len=16384)
  request = Packet.create_request('sniffer_capture_dump_read')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  request.add_tlv(TLV_TYPE_SNIFFER_BYTE_COUNT, len.to_i)
  response = client.send_request(request, 3600)
  {
    :bytes   => response.get_tlv_value(TLV_TYPE_SNIFFER_BYTE_COUNT),
    :data    => response.get_tlv_value(TLV_TYPE_SNIFFER_PACKET)
  }
end
capture_release(intf) click to toggle source

Release packets from a current capture

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 80
def capture_release(intf)
  request = Packet.create_request('sniffer_capture_release')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  response = client.send_request(request)
  {
    :packets => response.get_tlv_value(TLV_TYPE_SNIFFER_PACKET_COUNT),
    :bytes   => response.get_tlv_value(TLV_TYPE_SNIFFER_BYTE_COUNT),
  }
end
capture_start(intf,maxp=200000,filter="") click to toggle source

Start a packet capture on an opened interface

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 49
def capture_start(intf,maxp=200000,filter="")
  request = Packet.create_request('sniffer_capture_start')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  request.add_tlv(TLV_TYPE_SNIFFER_PACKET_COUNT, maxp.to_i)
  request.add_tlv(TLV_TYPE_SNIFFER_ADDITIONAL_FILTER, filter) if filter.length > 0
  response = client.send_request(request)
end
capture_stats(intf) click to toggle source

Retrieve stats about a current capture

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 69
def capture_stats(intf)
  request = Packet.create_request('sniffer_capture_stats')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  response = client.send_request(request)
  {
    :packets => response.get_tlv_value(TLV_TYPE_SNIFFER_PACKET_COUNT),
    :bytes   => response.get_tlv_value(TLV_TYPE_SNIFFER_BYTE_COUNT),
  }
end
capture_stop(intf) click to toggle source

Stop an active packet capture

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 58
def capture_stop(intf)
  request = Packet.create_request('sniffer_capture_stop')
  request.add_tlv(TLV_TYPE_SNIFFER_INTERFACE_ID, intf.to_i)
  response = client.send_request(request)
  {
    :packets => response.get_tlv_value(TLV_TYPE_SNIFFER_PACKET_COUNT),
    :bytes   => response.get_tlv_value(TLV_TYPE_SNIFFER_BYTE_COUNT),
  }
end
interfaces() click to toggle source

Enumerate the remote sniffable interfaces

# File lib/rex/post/meterpreter/extensions/sniffer/sniffer.rb, line 33
def interfaces()
  ifaces = []
  ifacei = 0
  request = Packet.create_request('sniffer_interfaces')
  response = client.send_request(request)
  response.each(TLV_TYPE_SNIFFER_INTERFACES) { |p|
    vals  = p.tlvs.map{|x| x.value }
    iface = { }
    ikeys = %W{idx name description type mtu wireless usable dhcp}
    ikeys.each_index { |i| iface[ikeys[i]] = vals[i] }
    ifaces << iface
  }
  return ifaces
end