Depending on how the site is configured, I may have to turn off certificate checking, and/or modify the headers (such as Host) to get it to connect.Ī more interesting example is one like I faced in Reddish. I can then use wget or curl to connect to 127.0.0.1:9001 and get things from the site.Any traffic sent to that listening port will be tunneled to my box, and then routed to This will connect back to my box, and start a listener on the target box. chisel server -p 8000 on my attacker box.
I’ll use chisel to create a tunnel to the site I want to download from as follows: I am on a target that can’t connect to the internet, but can route to my attacking machine. Examples Basic Client ListenerĪ silly example that illustrats listening on the client. In that case, the tunnel will go in the reverse direction. You can give it R for local-host to indicate that you want to listen on the remote host (ie, open the listener on the server). If no remote-host is given, it will default to the server. If no local-port is give, it will default to the same as the remote-port. If no local-host is given, it will assume 0.0.0.0 on the client. Of the four items, only the remote port is required. I think it’s more intuitive to think of it as :::, but I’ll use the names chisel uses in this post. Remote strings take the format of ::: as defined by chisel. Running this will connect to the server given, and create a tunnel for each give remote string. I’ll move a copy of chisel to target, and run it as.
-host allows me to define which interface to listen on, with all of them (0.0.0.0) being the default.There are other options I may want to add as well: That is what I want here, but be aware of what you’re allowed it to do. This means clients connecting in can open listening ports on my kali box. reverse tells the server that I want clients connecting in to be allowed to define reverse tunnels. If I don’t proivde this, it’ll try 8080 by default, which often fails since I almost always have Burp running on 8080. p will allow me to specify what port chisel listens on. On making that connection, I can define different kinds of tunnels I want to set up. What that means for me is that I can run a server on my kali box, and then connect to it from target boxes. Chisel is very similar to crowbar though achieves much higher performance. Chisel is mainly useful for passing through firewalls, though it can also be used to provide a secure endpoint into your network. Single executable including both client and server. Listen on Kali 4444, forward to 10.10.10.240 port 80Ĭreate SOCKS5 listener on 1080 on Kali, proxy through clientĬhisel is a fast TCP tunnel, transported over HTTP, secured via SSH. I learned about SSF from another HTB user, jkr, who not only introduced me to SSF, but pulled together the examples in this post. I wanted to play with it, and figured I’d document what I learned here. I learned about Chisel from Ippsec, and you can see his using it to solve Reddish in his video. Having just written up HTB Reddish, pivoting without SSH was at the top of my mind, and I’ve since learned of two programs that enable pivots, Chisel and Secure Socket Funneling (SSF). Chisel now has a built in SOCKS proxy! I also added a cheat sheet since I reference this post too often.