libnatives
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Read more: HackerOne H1-702 – Challenge 1Description: Someone chopped up the flag and hide it through out this challenge! Can you find all the parts and put them back together? Download APK: https://lautarovculic.com/my_files/challenge1_h1-702.apk Install the apk with adb adb install -r challenge1_h1-702.apk Then, decompile with apktool apktool d challenge1_h1-702.apk Let’s inspect the source code with jadx (GUI version)When the app is launched, we just see an blank activity with the text “Reverse the…
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Read more: AHE17: Android Hacking Events 2017 (Flag-Validator)Methods For this challenge, probably we need install some things into our Android 5.1 device with Genymotion.For example, an ARM Translator.https://github.com/m9rco/Genymotion_ARM_Translation For download the APKhttps://team-sik.org/wp-content/uploads/2017/06/FlagValidator.apk_.zip With apktool will extract the content of the apk file apktool d FlagValidator.apk Let’s see the content of MainActivity.java that say so clear the structure of the flag.In the onValidateClick method public void onValidateClick(View view) { new StringBuilder(“Validate Token…
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Read more: AHE17: Android Hacking Events 2017 (AES-Decrypt)For this challenge, we need install some things into our Android 5.1 device with Genymotion.For example, an ARM Translator.https://github.com/m9rco/Genymotion_ARM_Translation For download the APK https://team-sik.org/wp-content/uploads/2017/06/AES-Decrypt.apk_.zip Now, installing the APK, we can see a button and two text box for decrypt something. Then, let’s take around the code with jadx. Just we need this piece of Java…