Visual PCAP Mixer

What this is

• A highly experimental thing that I need for myself
• Untested code, potentially dangerous

YOU SHOULD NOT USE THIS UNLESS YOU KNOW WHAT YOU DO

You alone are responsible for using this tool, I do not take any responsibility for any kind of harm that it may cause.

Functions

• A go cli wrapper around existing tools that can analyze and modify pcaps. The tools are directly invoked as cmd. They write stuff on your harddrive. Thats why you should not use this.
• A react frontend for the browser to visualize what will happen with the pcaps.

Config

The backend needs a config.json. This thing differentiates attack samples and benign traffic. Example below.

Btw, nice dataset for attack & benign traffic here: https://www.unb.ca/cic/datasets/ids-2018.html

{
    "groundtruth": [
        {
            "files": [
                "/home/you/pcaps/unbca/attacks/28-02-2018/capEC2AMAZ-O4EL3NG-172.31.69.24-part1",
                "/home/you/pcaps/unbca/attacks/28-02-2018/capEC2AMAZ-O4EL3NG-172.31.69.24-part2"
            ],
            "attacks": [
                {
                    "attackers": [
                        "13.58.225.34"
                    ],
                    "victims": [
                        "172.31.69.24"
                    ],
                    "name": "Infiltration",
                    "start": "2018-02-28T10:50:00-04:00",
                    "end": "2018-02-28T12:05:00-04:00"
                },
                {
                    "attackers": [
                        "13.58.225.34"
                    ],
                    "victims": [
                        "172.31.69.24"
                    ],
                    "name": "Infiltration",
                    "start": "2018-02-28T13:42:00-04:00",
                    "end": "2018-02-28T14:40:00-04:00"
                }
            ]
        }
    ],
    "unclassifiedTraffic": [
        "/home/you/pcaps/unbca/benign/22-02-2018",
        "/home/you/pcaps/unbca/benign/28-02-2018"
    ],
    "outPath": "/home/you/pcap/apt-scenarios"
}

When you really really want to use this

Install dependencies:

$ go get github.com/spf13/cobra

Install packages for your linux distro. The go wrapper calls them.

• wireshark (needed: capinfos)
• tcpdump. in case you are on debian/ubuntu make sure that it can be used by your user. if you have app-armor in place and it blocks you, here is a guide https://gcplinux.com/tcpdump-permission-denied-running-as-root/
• tcpreplay (needed tcprewrite)

Init app

• add the backend folder to your go path
• build your own config.json file like above
• check the help menu go run main.go

You must first run a deep analysis over the configured files. Export the analysis results to a state file:

$ go run main.go export -e your_state.json

Grab a coffee in case you have several hundred gigs of traffic (as I do) ...

Now take the analysed files and host a server

$ go run main.go server -s your_state.json

Navigate to the frontend folder and fire it up. you need a moderately new version of npm / yarn:

$ npm install
$ npm start

Go to your browser, localhost:3000. When you did the config right the browser content looks somewhat like this:

In browser use

• create new days of an attack scenario by hitting the big +
• move all the stuff per drag n drop (attacks, traffic samples, days in the timeline)
• drag benign and attack traffic to your liking
• hover stuff for more info
• double click stuff to delete it
• you can rewrite IP addresses with the form in the bottom left corner
• name the scenario you created (form in lower right corner)

When you create an attack scenario the following will happen on your computer:

• first timestamp is taken from first traffic sample in day 1
• all other pcaps get time-adjusted, that they apprear to have been recorded in order
• IP replacements are applied
• stuff is copied to a new folder in the outPath that is configured in the config.json

Depending on your traffic samples that may fill your harddrive. again, be careful where you run this. better dont. NEVER HOST THIS ON A PUBLIC SERVER. it gives away cmd.

TODO:

• test this shit
• clean up, take out garbage
• I remember vaguely that I built in a silly assumption about filenames in the benign traffic folders. sigh. remove that.