![]() You can check whether Gatekeeper has flagged a file by listing the extended attributes on the command line. In order to run our malware, we’re going to have to first make sure that it hasn’t been blocked by Apple’s Gatekeeper or XProtect features. ![]() In particular, we want to read the encrypted string in the unpack.txt file in clear text to see how it contributes to our understanding of this malware’s behavior. It’s time to run our sample in our isolated VM in a controlled manner so that we can examine it at any point of our choosing. That looks a likely candidate for where the code in the text file might be read into memory. As a result, we found a method in the binary called “encryptDecryptOperation:”. In Part 2, we went on to examine the main executable using static analysis techniques to learn more. In the first part of our tutorial on macOS malware reverse engineering skills, we found the unpack.txt file containing encrypted code in the Resources folder.
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