timer

~# cat Question

You will find the flag after analysing this apk.

FILE: timer.apk

Opening up timer.apk in jadx will allow us to decomplie the code to see more information. Heading over to AndriordManifest.xml, the flag is hiding in plain sight.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="picoCTF{t1m3r_r3v3rs3d_succ355fully_17496}" android:compileSdkVersion="32" android:compileSdkVersionCodename="12" package="com.example.timer" platformBuildVersionCode="32" platformBuildVersionName="12">
    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="32"/>
    <application android:theme="@style/Theme.Timer" android:label="@string/app_name" android:icon="@mipmap/ic_launcher" android:debuggable="true" android:allowBackup="true" android:supportsRtl="true" android:fullBackupContent="@xml/backup_rules" android:roundIcon="@mipmap/ic_launcher_round" android:appComponentFactory="androidx.core.app.CoreComponentFactory" android:dataExtractionRules="@xml/data_extraction_rules">
        <activity android:name="com.example.timer.MainActivity" android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <provider android:name="androidx.startup.InitializationProvider" android:exported="false" android:authorities="com.example.timer.androidx-startup">
            <meta-data android:name="androidx.emoji2.text.EmojiCompatInitializer" android:value="androidx.startup"/>
            <meta-data android:name="androidx.lifecycle.ProcessLifecycleInitializer" android:value="androidx.startup"/>
        </provider>
    </application>
</manifest>

Flag: picoCTF{t1m3r_r3v3rs3d_succ355fully_17496}