Hotan Network Security Laboratory-- reverse100

This question is done only to verify the new apk decompilation tool and to try out the new source code text editing tool.

Thank you, brother Bai, for your recommendation.

1. Dexdecompile decompiler of dex package based on androguard.

Download the title rev100 and add the suffix zip. (apk is actually a zip package.) AR unzips class.dex.

Dexdecompile class.dex rev100

In the rev100 directory, a decompiled .java file is generated.

2. Sublime text 2 is an expensive source code editing tool that can be used for unlimited free trial.

Open the folder and you can easily see all the .java files. Feel easier to use than source insight, the speed is much faster. Cancel the scroll bar on the right and change it to a code thumbnail, which is cool as a whole.

If you look at layout.java first, you can see two interface controls inside. The first one is activeity_flag, which seems to imply that it is related to flag.

Look at the FlagActivity.java and see that the code actually shows a string of characters. This string of characters is initialized at v0.

Converting the number of v0 into ascii is flag.