This article provides examples of hacking techniques that can help Java developers avoid vulnerabilities in their programs.
It is not intended to train hackers but rather for naive developers who think that standard obfuscators will save them from their intellectual property theft.
Any experienced developer or hacker can easily complete them.
Let us look at this diagram from our point of view, i.e., developer, and then from a hacker's point of view.
The hacker starts from the first definition of the HttpURLConnection or similar class variable and follows the trail leading to the critical point: var4 -> var4 -> ... var3 -> var3 ... -> var4 -> return ... the rest of the garbage introduced by the obfuscator can be ignored.
In this case, as in many others, the security of your program depends only on the ingenuity of the hacker and not on your efforts.
A hacker hacks a program not for himself but to sell it.
Thus, the hacker needs to buy the program and perform the steps described earlier for the Client-Server scheme: replace the corresponding line accepting the Activation Key with return true and delete the command in the payment order.
The encrypted part includes key authentication, and launching the main program if successful.
Where enclosing Preloader class which sets args values and the Activation Key received from the Server after payment confirmation.
It is located inside the program since placing it on the server will return us to the previous scheme.
Unlike Case 1, a hacker cannot find the Launcher class using Java keywords related to the time and the line or lines to be changed.
This class must be reliably hidden from a hacker.
Class bytes, secondly, we move them into a folder /anyfolder, rename the class to anyname, and then decrypt it using the same key with the Authenticator class, as in Case 2.
The hacker can use a memory dump to get the data he needs.
A simple analysis of the Java run time arguments detects unwanted arguments, and the program stops working upon initialization without having time to load anything.
This is identifying the architecture that your program is part of, looking for existing vulnerabilities, as well as possible vulnerabilities in your program and how to hack them.
Use the structure of the program itself as it looks from the outside.
Security should be as well designed as your program itself.
New hacking methods are being invented, new versions of the JVM are being released, allowing more manipulation of the JVM memory, etc.
This Cyber News was published on feeds.dzone.com. Publication date: Wed, 03 Jan 2024 19:13:07 +0000