εxodus standalone

εxodus CLI client for local APK static analysis.

Summary

• Using Docker
• Manual usage
  • Installation
  • Analyze an APK file
  • Download an APK from an εxodus instance
• Continuous Integration
  • GitLab CI/CD
  • GitHub Actions

Using Docker

The easiest way to analyze an APK is to use our Docker image.

Simply go to the directory where the APK file is and run:

docker run -v $(pwd):/app --rm -i exodusprivacy/exodus-standalone /app/<your apk file>

Manual usage

Installation

Clone this repository:

git clone https://github.com/Exodus-Privacy/exodus-standalone.git
cd exodus-standalone

Install dexdump:

sudo apt-get install dexdump

Create Python virtualenv:

sudo apt-get install virtualenv
virtualenv venv -p python3
source venv/bin/activate

Download and install dependencies:

pip install -r requirements.txt

Analyze an APK file

Usage

$ ./exodus_analyze.py --help
usage: exodus_analyze.py [-h] [-t] [-j] [-o OUTPUT_FILE] [-i IGNORE] apk

positional arguments:
  apk                   the apk file to analyse

optional arguments:
  -h, --help            show this help message and exit
  -t, --text            print textual report (default)
  -j, --json            print JSON report
  -o OUTPUT_FILE, --output OUTPUT_FILE
                        store JSON report in file (requires -j option)
  -i IGNORE, --ignore IGNORE
                        comma-separated ids of trackers to ignore

Text output

./exodus_analyze.py my_apk.apk

be sure to activate the Python virtualenv before running exodus_analyze.py.

Example:

=== Informations
- APK path: /tmp/tmp1gzosyt4/com.semitan.tan.apk
- APK sum: 8e85737be6911ea817b3b9f6a80290b85befe24ff5f57dc38996874dfde13ba7
- App version: 5.7.0
- App version code: 39
- App name: Tan Network
- App package: com.semitan.tan
- App permissions: 9
    - android.permission.INTERNET
    - android.permission.ACCESS_NETWORK_STATE
    - android.permission.ACCESS_FINE_LOCATION
    - android.permission.WRITE_EXTERNAL_STORAGE
    - android.permission.READ_PHONE_STATE
    - android.permission.VIBRATE
    - com.semitan.tan.permission.C2D_MESSAGE
    - com.google.android.c2dm.permission.RECEIVE
    - android.permission.WAKE_LOCK
- App libraries: 0
=== Found trackers
 - Google Analytics
 - Google Ads
 - Google DoubleClick

JSON output

./exodus_analyze.py -j [-o report.json] my_apk.apk

be sure to activate the Python virtualenv before running exodus_analyze.py.

Example:

{
  "trackers": [
    {
      "id": 70,
      "name": "Facebook Share"
    },
    [...]
  ],
  "apk": {
    "path": "com.johnson.nett.apk",
    "checksum": "70b6f0d9df432c66351a587df7b65bea160de59e791be420f0e68b2fc435429f"
  },
  "application": {
    "version_code": "15",
    "name": "Nett",
    "permissions": [
      "android.permission.INTERNET",
      "android.permission.ACCESS_NETWORK_STATE",
      "android.permission.WRITE_EXTERNAL_STORAGE",
      "android.permission.READ_PHONE_STATE",
      "android.permission.READ_EXTERNAL_STORAGE",
      "android.permission.WAKE_LOCK",
      "com.google.android.c2dm.permission.RECEIVE",
      "com.johnson.nett.permission.C2D_MESSAGE"
    ],
    "version_name": "1.1.12",
    "libraries": [],
    "handle": "com.johnson.nett"
  }
}

Pitfalls

This tool uses dexdump and only provides GNU/Linux x86_64 version of it.

Download an APK from an εxodus instance

Configuration

Create config.py file in the project directory specifying:

CONFIG = {
    'username': 'alice',
    'password': 'bob',
    'host': 'http://localhost:8000'
}

Usage

$ ./exodus_download.py --help
usage: exodus_download.py [-h] report_id destination

positional arguments:
  report_id    the report of the app to download
  destination  the destination folder

optional arguments:
  -h, --help   show this help message and exit

be sure to activate the Python virtualenv before running exodus_download.py.

Example of output

./exodus_download.py 15 /tmp/
Successfully logged in
Downloading the APK ...
APK successfully downloaded: /tmp/fr.meteo.apk

Continuous Integration

You can use εxodus-standalone in your CI pipelines.

Below are listed some examples of how to integrate it.

GitLab CI/CD

exodus_scan:
  stage: audit
  image:
    name: exodusprivacy/exodus-standalone:latest
    entrypoint: [""]
  script:
    - /exodus_analyze.py [YOUR_APK_PATH]

GitHub Actions

steps:
  - name: Execute exodus-standalone
    uses: docker://exodusprivacy/exodus-standalone:latest
    with:
      args: /github/workspace/[YOUR_APK_PATH]