cryptax / angeapk Goto Github PK

so after deleting dec- from line 4 to make it only anakin-original.png cause it didnt compile correctly thats the new error and i cant understand which strings of length 16 or maybe it means that it can`t find the png to decrypt
oh and i checked if the eocd2 apk unzips and it does unzip correctly
thank you very much

Hi Axelle,

I have been following the angeAPK talk. However ,I faced with some issues when I tried to use DexClassLoader.

I would like to unpack and load the dynamic code in the application activity, I was able to get the payloadapk, however when I try to load in the next method loadAPK(): the application crashes and gives me this exception:

java.lang.ClassNotFoundException: Didn't find class "com.example.cryptedv2.StringXORed" on path: DexPathList[[zip file "/storage/emulated/0/hidden.apk"],nativeLibraryDirectories=[/system/lib]]

` private void loadApk(String apkPath) {

    String className = "com.example.cryptedv2.StringXORed"; //modify to new one
    String methodToInvoke = "getFlagEncrypt"; //Modificar to new one

    Log.v("loadDexClasses", "Dex Preparing to loadDexClasses!");

    File dexOpt = this.getDir("dexOpt", MODE_PRIVATE);
    final DexClassLoader classloader = new DexClassLoader(
            apkPath,
            dexOpt.getAbsolutePath(),
            null,
            this.getClassLoader());

    Log.v("loadDexClasses", "Searching for class : "
            + "com.registry.Registry");
    try {
        Class<?> classToLoad = (Class<?>) classloader.loadClass(className);
        Object instance = classToLoad.newInstance();
        Method method = classToLoad.getMethod(methodToInvoke);
        String flag = (String) method.invoke(instance);
    } catch (IllegalAccessException e) {
        e.printStackTrace ();
    } catch (ClassNotFoundException e) {
        e.printStackTrace ();
    } catch (NoSuchMethodException e) {
        e.printStackTrace ();
    } catch (InvocationTargetException e) {
        e.printStackTrace ();
    } catch (InstantiationException e) {
        e.printStackTrace ();
    }

`

I tried to obfuscated also a .dex file of the application but it is also throwing the same exception.

Thanks in advance,

Fernando

Hi
after padding the file, i tried to encrypt it using encrypt-apk.py (the script that was generated in the beginning from running angecrypt. However as i run the script on the file it gives an error
"" Traceback (most recent call last):
File "encrypt-apk.py", line 7, in
d = algo.encrypt(d)
File "/usr/lib/python2.7/dist-packages/Crypto/Cipher/blockalgo.py", line 244, in encrypt
return self._cipher.encrypt(plaintext)
ValueError: Input strings must be a multiple of 16 in length
""
im a bit new to this and this may seem like a dumb problem but ive spent over a week now trying to figure it out.
hoping for a response.

Hey, when I try to implement this project with pdf, everything goes smooth except that the payload couldn't be installed, the error being there was a problem parsing the package.
I have implemented the same version of the wrapping apk as for the png and jpg. Should I assume that the error is indeed in this part?
Kindly help.
I shall be obliged.
Regards