![]() You can also use an ICMP attack, or a DHCP attack, or physical attack, or some other attack, to obtain control of sheep's traffic.įor more information about Bettercap, see the Bettercap page.įor more information on how the ARP poisoning attack works, see the ARP Poisoning page.įor more information on how to carry out an ARP poisoning attack with Bettercap, see MITM Labs/Bettercap Over Wifi Start Capturing Traffic with Wireshark I'll run a straightforward man in the middle ARP poisoning attack with Bettercap for this demonstration. Once you have that working, then move on to including a MITM attack in the mix. ![]() Eavesdrop/MITM the sheep's encrypted connection, on the sheep, and decrypt the resulting encrypted pcap file. (There are a lot of different configurations for MITM attacks, so even though you have remote access to the sheep and presumably more info from that side, it is not necessarily practical.)Ī good place to start is to assume that you have full control of the sheep. If you have remote access to the sheep, you should have remote control over when the action that obtains SSL session information occurs. It is important to note that the SSL keys are ephemeral (per-connection), so the timing of the encrypted pcap packet capture must match the timing of the SSL session info obtained using the SSLKEYLOGFILE method. Decrypt the HTTPS traffic (live and offline) with Wireshark.Decrypt the HTTPS traffic (live and offline) with SSLDump.Carry out a man in the middle attack (in this case, we'll use Bettercap, but anything else will work too) to intercept the target's web traffic. ![]() We'll be using the following tools to illustrate method 1: pem file (see MITM Labs/Decrypting HTTPS Traffic with Private Key File page for how to do that). This is easiest when you have the actual private key. Use the SSLDump tool, a command-line tool for capturing and decoding SSL streams given the proper credentials. This is the easiest technique when you have the raw SSL private key info (this technique).Ģ. ![]() Use Wireshark, which has built-in functionality to do this. To actually utilize these, we can use two method:ġ. This technique will give us raw SSL private key info in the SSLKEYLOGFILE file. The HTTPS traffic will appear encrypted in the pcap file, but with the sheep's private key, we can decrypt all the HTTPS traffic we want. Think ahead to how quickly the pcap files will grow, how much space you have, and how fast you can exfiltrate.Rotate pcap files every N minutes or N hours, based on the traffic you're expecting.The more information you can filter, the better - smaller file sizes, easier to exfiltrate, less postprocessing, more targeted.The Tcpdump page has more on how to best utilize tcpdump, but here are some tips: See tips below on filtering to keep this from being an overwhelming amount of data. If sniffing locally, sniff the network device that the browser will be using (or sniff all network devices, if you aren't sure which one).Once you have made a connection to the sheep, pass all traffic from/to the sheep through a network tap device, and use a standard sniffing tool to dump all the traffic (e.g., tcpdump). If sniffing remotely, carry out a MITM attack, such as ARP Poisoning, with a tool like Bettercap.In order to sniff HTTPS traffic, we can either sniff remotely or locally. OpenSSL and other online converters can convert private keys among the various formats available. Ultimately we're looking for private keys in either PEM or PKCS12 format. How might you obtain the private key they use for HTTPS, which would allow you to decrypt all of their HTTPS traffic? Suppose you wish to eavesdrop on a sheep's HTTPS traffic, and you have physical access to their machine. Unlike SSLStrip or SSLSniff, this attack requires more information from the sheep (and potentially requires more invasive methods), but is entirely transparent to the sheep if carried out correctly. This page will cover an attack on HTTPS that utilizes a stolen private key to decrypt and sniff HTTPS traffic from a sheep user. 2.1.4 Inspecting Decrypted Traffic in Wireshark with SSLKEYLOGFILE.2.1.3 Obtain SSL Session Info from Firefox.2.1.2 Start Capturing Traffic with Wireshark.2.1.1 Optional: Start Man in the Middle Attack.1.3 Decrypting SSL Traffic with SSL Info.
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