Packet generation and network based attacks with Scapy - SecDev.org

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TCP port scanIntroductionScapyNetwork discovery and attacksOne shotsScanningTTL tricksSend a TCP SYN on each portWait for a SYN-ACK or a RST or an ICMP errorSending packetsres,unans = sr( IP(dst="target")/TCP(flags="S", dport=(1,1024)) )Possible result interpretation: open portsres.nsummary( filter=lambda (s,r): \(r.haslayer(TCP) and \(r.getlayer(TCP).flags & 2)) )Philippe BIONDIPacket generation and network based attacks with Scapy
IntroductionScapyNetwork discovery and attacksOne shotsScanningTTL tricksDetect fake TCP replies [Ed3f]Send a TCP/IP packet with correct IP checksum and badTCP checksumA real TCP stack will drop the packetSome filters or MitM programs will not check it and answerSending packetsres,unans = sr( IP(dst="target")/TCP(dport=(1,1024),chksum=0xBAD) )Possible result interpretation: fake repliesres.summary()Philippe BIONDIPacket generation and network based attacks with Scapy
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Pretty printingIntroductionScapyNet
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Packet generation and network based attacks with Scapy - SecDev.org

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