A Java class can be reverse-engineered into a Papyrus class diagram: You can now add it into your diagram.
Code Signing; and Licensing. Attacks on security controls are very common. For example, adversaries alter control flows to bypass authentication checks or licensing requirements. Often, an adversary will enable otherwise prohibited functionality embedded in an app. LVL determines the licensing status on behalf of the app through the LicenseChecker class.
An adversary defeats LVL logic by modifying a single decision-making instruction declared within the LicenseChecker. Technical Recommendation To minimize the risk that an adversary will modify control-flow and disable security Preventing reverse engineering threat in java with an application, consider doing the following: Perform a checksum of code that contains critical instruction-branch code.
Checksum validation of this code should occur immediately before the application executes this code; Add additional checksums that check the original checksum to ensure that an adversary is unable to modify the original checksum; Additional checksum validations of the code and other checksums should occur in other random parts of the application to ensure redundant validation that is unpredictable to the adversary; and Ensure that the checksum code does not have a binary signature that is easily identifiable by the adversary.
Otherwise, the adversary will be able to identify all checksum instances and bypass them. For example, they may choose to not honor a financial transaction conducted on the device due to increased uncertainty of its security environment.
An adversary can force an application to run in these devices by modifying the logic of the jailbreak-detection code. Jailbreak detection code is notoriously difficult to implement correctly due to a myriad of evolving techniques available for an adversary to bypass or trick the code.
The adversary successfully tricks the code into running in a hostile environment. Technical Explanation Many security-sensitive iOS apps such as mobile banking and peer-to-peer payment apps require a secure environment in order to execute.
These apps have capabilities to detect whether their host is sound. They may choose to not execute in jailbroken environments due to valid security concerns. The jailbreak-detection mechanisms implemented within many apps are exposed in the clear, without protection, and can be defeated easily.
There are various ways to detect whether an iOS device has been jailbroken.
Below are some examples: Detect the existence of Cydia: Cydia is an iOS app that finds and installs software packages on jailbroken devices. Its existence on a device indicates the device has been jailbroken. One way to check its existence is to execute a system call via inlined-assembly code.
Since the point of jailbreaking is to break out from the application sandbox, being able to do things prohibited by the sandbox is an indicator of jailbreak.
For example, sandboxed processes are prohibited to fork child processes. By calling fork and checking the returned code, an app can detect whether it is run on a jailbroken device. The above algorithms represent a small subset of the necessary algorithms needed to properly detect a jailbroken environment.
Adversaries can use a wide assortment of reverse-engineering and integrity-violating schemes to bypass each specific algorithm technique. To automate attacks against jailbreak-detection mechanisms, adversaries leverage automated tools like xCon. It has succeeded in attacking many apps.
To effectively prevent automated jailbreak-detection attacks with tools like xCon, organizations must build a detection control that includes an accurate and complete set of algorithms that will detect a jailbroken environment. The set of algorithms and other aspects to look for is quite extensive.
Then, organizations must combine all of these algorithms with appropriate reverse-engineering and integrity-violation prevention techniques.
Technical Recommendations To mitigate the risks that the organization has not implemented a complete and balanced jailbreak detection routine, consider doing the following: Follow the risk mitigation strategy of method swizzling prevention to prevent an adversary from weakening a jailbreak detection control already implemented; Follow the risk mitigation strategy of branch-failure prevention in order to prevent an adversary from making unauthorized changes to control-flow related to Jailbreak detection; Implement all of the appropriate jailbreak detection algorithms disclosed through various jailbreaking communities such as xCon.
This checksum should compare the checksum of the files at build-time to the values found at runtime. In such a scenario, an adversary will be able to quickly identify and disable all checksum instances within the binary.Apr 08, · Code built using an intermediate language such as Objective-C or Java is highly vulnerable to reverse engineering.
Compiled applications written in these languages include source-level class interfaces and other rich metadata that the associated compiler will automatically include within the final binary.
Preventing reverse-engineering of client application.
but I've heard about lawsuits on reverse engineering. Legal threat might deter companies and individuals from selling or providing custom clients. Preventing reverse engineering through obfuscation and . May 26, · what is this project?
Name: OWASP Reverse Engineering and Code Modification Prevention Project Purpose: The purpose of the project is to educate application security experts about the risks and appropriate mitigation techniques that organizations should implement to prevent an adversary from reverse engineering or modifying the developer's code within untrustworthy .
Preventing Reverse Engineering Threat in Java Using Byte Code Obfuscation Techniques Abstract: Java programs are complied in to a platform independent byte code format. Much of the information contained in the source code is retained in the byte code.
Through Eclipse Mars, the Java Reverse Engineering was available in the Papyrus extra plugins. Since Eclipse Neon, they are now in a separate Papyrus component, called Papyrus software designer. The Java reverse tools allow Java files or packages to be reverse-engineered into a Papyrus class diagram.
Preventing Reverse Engineering Threat in Java Using Byte Code Obfuscation Techniques Jan M. Memon, Shams-ul-Arfeen, Asghar Mughal, Faisal Memon Department of Computer Science.