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Scapy for Beginners

U
UdayKumarN

Scapy is a powerful packet manipulating tool. This presentation covers basics of Scapy tool with useful commands and their examples.

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Udaykumar
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Email id: udaynamburu@gmail.com
Twitter: @vebzzdude
 What & Who
 Why
 How
 Examples
 SNMP DDoS Amplification Attack
 References
 Scapy is a powerful packet manipulation tool.
 Written in Python.
 Can forge or decode packets, send them on the wire, capture
them, and match requests and replies.
 Also can handle tasks like scanning, tracerouting, probing,
unit tests, attacks, and network discovery.
 Thanks to Philippe Biondi !!
 Simple. Send packets & receive answers
 Fast packet design
 Interactive shell
 Only decodes. Interpreting left to humans
 Meaningful default values
 Can frame and send malformed & insensible
packets
 sudo scapy
 conf - This object contains the configuration of scapy
 conf.__doc__
 conf.version
 conf.iface
 conf.route
 ls()
 lsc()
 send
 sendp
 sr
 srloop
 srp
 srploop
 sniff
 traceroute
 rdpcap
 wrpcap
 hexdump
 load_contrib

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Scapy for Beginners

  • 2.  What & Who  Why  How  Examples  SNMP DDoS Amplification Attack  References
  • 3.  Scapy is a powerful packet manipulation tool.  Written in Python.  Can forge or decode packets, send them on the wire, capture them, and match requests and replies.  Also can handle tasks like scanning, tracerouting, probing, unit tests, attacks, and network discovery.  Thanks to Philippe Biondi !!
  • 4.  Simple. Send packets & receive answers  Fast packet design  Interactive shell  Only decodes. Interpreting left to humans  Meaningful default values  Can frame and send malformed & insensible packets
  • 5.  sudo scapy  conf - This object contains the configuration of scapy  conf.__doc__  conf.version  conf.iface  conf.route  ls()  lsc()
  • 6.  send  sendp  sr  srloop  srp  srploop  sniff  traceroute  rdpcap  wrpcap  hexdump  load_contrib
  • 8. Layer 3 Ping: >>> pkt = IP()/ICMP() >>> pkt = IP(dst=“null.co.in")/ICMP() >>> pkt.show() >>> pkt.display() >>> pkt.show2() >>> pkt.command() >>> send(pkt, iface="eth0") >>> send(pkt, iface=“eth0”, loop=1, inter=1) >>> ping, pong= srloop(pkt) >>> ping.show() >>> ping.summary()
  • 9. Layer 2 Ping: >>> pktp = Ether()/IP(dst="null.co.in/")/ICMP() >>> pktp.show() >>> pktp.display() >>> pktp.show2() >>> pktp.command() >>> pktp.payload.show() >>> pktp.payload.underlayer.show2() >>> pktp.payload.payload.type >>> sendp(pktp, iface="eth0") >>> sendp(pktp, iface=“eth0”, loop=1, inter=1) >>> pingp, pongp= srploop(pktp) >>> pingp.show() >>> pingp.summary()
  • 10. Traceroute: >>> ans, unans = traceroute([‘null.co.in’, ‘www.google.com’, ’www.twitter.com’, ‘www.makeuseof.com’], maxttl=10) >>> ans.show() >>> ans.summary() >>> ans[0] >>> str(ans[0]) >>> hexdump(ans[0]) >>> wrpcap("traceroute_ans.pcap", ans) >>> traceroute_ans_read=rdpcap("/root/traceroute_ans.pcap") >>> traceroute_ans_read.show() Sniff: >>> a=sniff(iface="eth0", count=10) >>> traceroute_ans_read=sniff(offline=“/root/traceroute_ans.pcap”)
  • 12.  www.secdev.org/projects/scapy/  https://media.readthedocs.org/pdf/scapy/latest/scapy.pdf  http://packetlife.net/blog/2011/may/23/introduction-scapy/  https://github.com/0x90/uberscapy  http://www.nothink.org/misc/snmp_reflected.php  https://alibay.com.tr/?p=955  https://www.omicsonline.org/open-access/scapy-a-python-tool-for- security-testing-jcsb-1000182.php?aid=51554  https://www.coursehero.com/file/7378007/scapy/