ctf
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Read more: Google CTF 2016 – Little Bobby applicationNote: 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 Download APK: https://lautarovculic.com/my_files/BobbyApplication_CTF.apk Install the apk with adb adb install -r BobbyApplication_CTF.apk We can see a login form. Let’s decompile the content with apktool. apktool d BobbyApplication_CTF.apk And let’s check the source code with jadx (GUI version)We can conclude that the package name is bobbytables.ctf.myapplication After create an user “asd” for…
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Read more: IceCTF 2015 – HusavikDescription: This handy Android App is supposed to display the flag, but it’s not working!Note: 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 Download APK: https://lautarovculic.com/my_files/husavik.apk Install the apk with adb adb install -r husavik.apk Then, decompile it with apktool apktool d husavik.apk We can see inspecting the source code with jadx (GUI version)That in…
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Read more: PoliCTF 2015 – Crack Me If You CanDescription: John bets nobody can find the passphrase to login!Note: 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 Download APK: https://lautarovculic.com/my_files/crack-me-if-you-can.apk Install the apk with adb adb install -r crack-me-if-you-can.apk Then, decompile it with apktool apktool d crack-me-if-you-can.apk We can see the source code with jadx (GUI version).There are some activities so curious..In…
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Read more: SECCON Quals CTF 2015 – Rock, Paper, ScissorsDescription: Please win 1000 times in rock-paper-scissorsNote: 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 Download APK: https://lautarovculic.com/my_files/rps.apk Install the apk with adb adb install -r rps.apk Then, decompile it with apktool apktool d rps.apk We can see the game Rock, Paper and Scissors.If we win, +1.Draw keep points and loose all the pointsWe need…
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Read more: Trend Micro CTF 2015 – Offensive 200Note: 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 Download APK: https://lautarovculic.com/my_files/VirusClicker.apk Install the apk with adb adb install -r VirusClicker.apk And decompile with apktool apktool d VirusClicker.apk We can notice that the app isn’t responding. So I need install this app into an Android API29Let’s inspect the source code with jadx (GUI version)We have the SplashActivity, MainActivity, and…
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Read more: Cyber Security Challenge 2015 – Reverse That App & Nviso VaultReverse That App Description: We have intercepted a malicious Android binary, and we need your help analyzing the application! Reports from the wild say that this piece of malware is sending text messages to a premium number, resulting in a huge phone bill for the victims! This needs to stop… Can you identify the mobile…
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Read more: 0CTF 2015 Quals CTF – VezelDescriptionEvermars says he is good at repackaging Android applications. 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 APKhttps://lautarovculic.com/my_files/vezel.apk Install it with adb adb install -r vezel.apk We can see a text edit and an button.Let’s decompile the apk with apktool apktool d vezel.apk The package name is com.ctf.vezel Let’s inspect the source code with jadx.We just…
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Read more: 0CTF 2015 Quals CTF – SimpleapkDescriptionThis is a simple apk, Could you find the flag? 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 APKhttps://lautarovculic.com/my_files/simple.apk Install it with adb adb install -r simple.apk We can see a text edit and an button.Let’s decompile the apk with apktool apktool d simple.apk The package name is easyre.sjl.gossip.easyre Let’s inspect the source code with jadx.There…
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Read more: TinyCTF 2014 – Oh! What does this button do?Note: 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 Download APK: https://lautarovculic.com/my_files/rev200.zip When download the .zip file, we can extract this with 7z x rev200.zip The rev200 file is another zip file rev200: Zip archive data, at least v2.0 to extract, compression method=deflate So, what is an apk? We can look this…
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Read more: Sharif University Quals CTF 2014 – Commercial ApplicationCategory: CryptoDescription: Flag is a serial number. Note: 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 Download APK: https://lautarovculic.com/my_files/suCTF.apk Install the apk with adb adb install -r suCTF.apk Decompile this with apktool apktool d suCTF.apk And now we can inspect the source code with jadxBut, first at all, let’s take a look to the…