odup/jsp-bytecode-webshell

Dynamic JSP webshell that receives Java class bytecode, loads and execute it, returning the output to the operator.

jsp-bytecode-webshell

Dynamic JSP webshell that receives Java class bytecode, loads and execute it, returning the output to the operator. The client generates the bytecode during runtime using a payload template that calls java.Runtime.exec() with a provided string as input, XORs it and sends to JSP page.

How to use

1. Upload webshell.jsp to target server (e.g. as Tomcat WAR package)

   • jar cvf app.war webshell.jsp

2. Compile and run client.java and provide the webshell URL argument:

   • javac client.java && java client http://127.0.0.1:8080/app/webshell.jsp

References

• https://github.com/fa1c0n1/MyJSPWebshell

• Only for educational and ethical use-cases.