Your media access controller address or MAC address is unique and hard coded into to each network adapter device and is used to identify a device when connected to a LAN.
A mac address can be also identify the manufacturer of the device chipset. So why is this knowledge important when discussing hacking? First and foremost the basic knowledge of what a network card is and how it relates to the OSI module is important to understand for basic computer networking principles. Additionally, when looking at intrusion detection systems or firewall logs its possible to pick out network packets that have been constructed by humans and not by machine.
Attackers with strong networking abilities are usually much harder to detect than those without because they can craft packets that will avoid detection by typical methods. It may seem arbitrary to discuss network cards, and its application in hacking may be a bit of a stretch. MiLk - Thanks! I just tested in 5. Skip to content. Star New issue. Jump to bottom. Copy link. Owner Author. Looking at debug level output, it seems the hostonly adapter is brought up correctly INFO interface: output: Preparing network interfaces based on configuration INFO subprocess: Command not in installer, restoring original environment Administrator privileges will be required This may take a few minutes Since the image data is larger than the MTU maximum transmission unit , every image is broken into a stream of packets and then reconstructed by the client.
Now that we have explained the basics of how the camera connects to the network and communicates, let the fun begin! Since our camera uses the JFIF format, by default there is an easy way to disrupt the video stream — by constantly ending the image. The results of the function can be seen in Figure 4. Figure 4: Result of EOI injection every ten-thousandth of a second. Next, we decided to try something a little more complicated and change the video stream to a pre-recorded video of our liking.
First, we used Wireshark to record a video stream of packets sent from the camera to the client. Of course, simple injection of the recorded stream to the client while the camera is sending a live stream would not work since the data would interfere with one another it turns out this could also be used as a method for blinding the camera, similar to the previous EOI attack. Once again, using scapy, we were able to send a command to the camera instructing it to stop streaming, while allowing us to inject our pre-recorded video stream with no interference.
He started with an Arduino, but the lack of debugging quickly sent him to an Atmega in Atmel Studio. With data finally coming out of the circuit, he was able to tell that his original back-of-the-napkin calculations for bandwidth were wrong.
Now he just needs a giant LED matrix to show off his current network stats!
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