The worst thing that can happen to any hacker is being detected by a security admin, the security technologies (IDS, firewall, etc.), or a forensic investigator.
Every time we send a packet to our intended target, that packet contains our IP address in the IP header. When we make a TCP connection, the target system will log our IP address as it logs all connections. If we set off any security alarms or alerts, our IP address will be logged. All of these events increase the possibility of detection.
In order to hack anonymously with the least chance of detection, we need to use an intermediary machine whose IP address will be left on the target system. This can be done by using proxies.
These systems are designed to accept our traffic and then forward it on to the intended target. Of course, the proxy will likely log our traffic, but an investigator would have to get a subpoena or search warrant to obtain the logs.
If we string multiple proxies in a chain, we make it harder and harder to detect our original IP address. If one of those proxies is outside the jurisdiction of the victim, it makes it very unlikely that any traffic can be attributed to our IP address.
Both Kali and BackTrack have an excellent tool for proxying our traffic called proxychains. In this tutorial, I will show how to use this simple, but powerful tool.
Step 1: Find Proxychains
Let's start by finding proxychains. Type:- kali > locate proxychains
Step 2: Proxychains Syntax The syntax for the proxycahins command is simple and straightforward.
- kali> proxychains <the command you want proxied> <any arguments>
- kali> proxychains nmap -sS <IP address>
Step 3: Set Up the Config File
Like nearly every application in Linux/Unix, configuration is managed by a simple text file called the config file. In the case of proxychains, this file is /etc/proxychains.conf. We can open it in leafpad or any other text editor (vi, emacs, gedit, kwrite, etc.), by typing:- kali > leafpad /etc/proxychains.conf
Notice the last line in the screenshot above. It directs proxychains to send the traffic first through our host at 127.0.0.1 on port 9050 (the default Tor configuration). If you are using Tor, leaves this as it is. If you are not using Tor, you will need to comment out this line.
As much as I like Tor, it is very slow and we now know that the NSA has broken Tor, so I am much less likely to depend upon it for anonymity.
Step 4: Let's Test It
Now that we have put a proxy between us and any traffic we send, let's test it out. In this case, I am simply going to do an nmap scan to wonderhowto.com anonymously by sending the scan through a proxy. The command would be as follows:- kali > proxychains nmap -sS 8.26.65.101
Some More Interesting Options
Now that we have proxychains working, let's look at some options that we can configure through the proxychains.conf. As we now have it set up, we are simply using a single proxy. We can put in numerous proxies and use all of them, we can use a limited number from the list, or we can have proxychains change the order randomly. Let's try all of those options.Step 5: Add More Proxies
First, let's add some more proxies to our list. Open /etc/proxychains.config and add more proxy IPs like I've done below.Step 6: Proxychaining
Now that we have multiple IPs in our proxychain.conf we can set up dynamic chaining. Dynamic chaining will enable us to run our traffic through every proxy on our list, and if one of the proxies is down or not responding, it will automatically go to the next proxy in the list without throwing an error.To do so, let's first open the proxychains configuration file again.
Step 7: Random Chaining
Finally, we can also use "random chaining". With this option, proxychains will randomly choose IP addresses from our list and use them for creating our proxychain. This means that each time we use proxychains, the chain of proxy will look different to the target, making it harder to track our traffic from its source.To do so, open the /etc/proxychains.conf file and comment out "dynamic chains" and uncomment "random chain". Since we can only use one of these options at a time, make certain that you comment out the other options in this section before using proxychains.
In addition; you may want to uncomment the line with "chain_len". This will determine how many of the IP addresses in your chain will be used in creating your random proxy chain.
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