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You are here: Home » offline » Processing the DEFCON 26 CTF PCAPS using Trisul NSM
Trace: • Suricata-EVE-Unixsocket • How to redirect Netflow to Trisul across network segments using NAT • QUIC protocol analysis using the Trisul Scripting API
offline:defcon26ctf

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offline:defcon26ctf [2018/11/12 22:58] – [PCAP totals dashboard] veeraoffline:defcon26ctf [2018/11/12 23:00] (current) – [Port connections over time] veera
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 Click on //Retro > Retro Counters// to view a Timeline showing traffic bandwidth. Here we see between 10 and 100Mbps spanning a 3-day period of the competition. From here you can select any timewindow and drill down into Counters.  Click on //Retro > Retro Counters// to view a Timeline showing traffic bandwidth. Here we see between 10 and 100Mbps spanning a 3-day period of the competition. From here you can select any timewindow and drill down into Counters. 
  
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 Click on //Dashboards > Sessions// to see top flows by volume, long lived flows, download, upload.  This is a really good place to start because in many CTF or even enterprise loads - elephant flows ((Elephant flows are large volume flows that dominate the bulk of the data transfer))  dominate the overall volume of data. Here we see a single flow from IP 10.13.37.8 pushing nearly 800MB in a 10 Min transfer.  Click on //Dashboards > Sessions// to see top flows by volume, long lived flows, download, upload.  This is a really good place to start because in many CTF or even enterprise loads - elephant flows ((Elephant flows are large volume flows that dominate the bulk of the data transfer))  dominate the overall volume of data. Here we see a single flow from IP 10.13.37.8 pushing nearly 800MB in a 10 Min transfer. 
  
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 Select //Alerts > Show All > IDS// to show the IDS alert categories seen.  You can then click on an alert to drill down further or pull up PCAPs.   Select //Alerts > Show All > IDS// to show the IDS alert categories seen.  You can then click on an alert to drill down further or pull up PCAPs.  
  
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 Trisul lets you seamlessly pivot from any analysis point to PCAPs. You can pull down entire PCAP or use the super nifty "PCAP Headers" to only see the top of the PCAP. In the PCAP headers, we show the 'strings' seen in the PCAP header, the actual Hexdump, and a TSHARK like packet summary.   Trisul lets you seamlessly pivot from any analysis point to PCAPs. You can pull down entire PCAP or use the super nifty "PCAP Headers" to only see the top of the PCAP. In the PCAP headers, we show the 'strings' seen in the PCAP header, the actual Hexdump, and a TSHARK like packet summary.  
  
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 The last one here is quite interesting. Go to Retro Counters > Select the entire Time interval and then select "Apps".  We find that CTF contestants attacking different ports on different days. Hmm, maybe something to look deeper into.  The last one here is quite interesting. Go to Retro Counters > Select the entire Time interval and then select "Apps".  We find that CTF contestants attacking different ports on different days. Hmm, maybe something to look deeper into. 
  
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 +
 +===== Conclusion=====
  
 Hope network analysis enthusiasts find this useful.   The docker image  bundles a [[https://trisul.org|Free License of Trisul]]. PCAP dumps upto 3 days in time can be imported.  Hope network analysis enthusiasts find this useful.   The docker image  bundles a [[https://trisul.org|Free License of Trisul]]. PCAP dumps upto 3 days in time can be imported. 
offline/defcon26ctf.1542043684.txt.gz · Last modified: 2018/11/12 22:58 by veera