MobileAudit : SAST and Malware Analysis for Android Mobile APKs

MobileAudit is a SAST and Malware Analysis for Android Mobile APKs.

Django Web application for performing Static Analysis and detecting malware in Android APKs

In each of the scans, it would have the following information:

• Application Info
• Security Info
• Components
• SAST Findings
• Best Practices Implemented
• Virus Total Info
• Certificate Info
• Strings
• Databases
• Files

For easy access there is a sidebar on the left page of the scan:

Components

• db: PostgreSQL 13.2
• nginx: Nginx 1.19.10
• rabbitmq: RabbitMQ 3.8.14
• worker: Celery 5.0.5
• web: Mobile Audit App

Docker Base images

Image is based on python buster. Link to Docker Hub image

Image	Tags	Base
mpast/mobile_audit	1.3.8	python:3.9.4-buster
mpast/mobile_audit	1.3.6	python:3.9.2-buster
mpast/mobile_audit	1.3.0	python:3.9.1-buster
mpast/mobile_audit	1.0.0	python:3.9.0-buster

Main Features

•  Uses Docker for easy deployment in multiplatform environment
•  Extract all information of the APK
•  Analyze all the source code searching for weaknesses
•  All findings are categorized and follows CWE standards
•  All findings are categorized and include Mobile Top 10 Risk
•  Also highlight the Best Practices in Secure Android Implementation in the APK
•  The findings can be edited and the false positives can be triaged and deleted
•  All scan results can be exported to PDF
•  User authentication and user management
•  API v1 with Swagger and ReDoc
•  TLS
•  Dynamic page reload (WIP)
•  LDAP integration
•  Export to Markdown
•  Export to CSV

Patterns

The application has an engine with different rules and patterns that are used though the findings scanning phase to detect vulnerabilities and/or malicious code into the apk.

These can be activated and deactivated in /patterns

Note: some of the hardcoded patterns are from apkleaks

Models

The application has an created models for each of the entities of the scans’ information to be able to create relations an abtain the best conclusions for each of the apks.

To see the whole model schema, go to models

### Integrations

Virus Total (API v3)

It checks if there has been an scan of the APK and extract all its information. Also, there is the possibility of uploading the APK is selected a property in the environment (Disabled by default).

Defect Dojo (API v2)

It is possible to upload the findings to the defect manager.

MalwareDB & Maltrail

It checks in the database if there are URLs in the APK that are related with Malware.

Installation

Using Docker-compose:

The provided docker-compose.yml file allows you to run the app locally in development.

To build the local image and if there are changes to the local Application Dockerfile, you can build the image with:

docker-compose build

Then, to start the container, run:

docker-compose up

Optional: run in detached mode (not see the logs)

docker-compose up -d

Once the application has launched, you can test the application by navigating to: http://localhost:8888/ to access the dashboard.

Also, there is a TLS version using docker-compose.prod.yaml running in port 443

To use it, execute

docker-compose -f docker-compose.prod.yaml up

Then, you can test the application by navigating to: https://localhost/ to access the dashboard.

For more information, see TLS

To stop and remove the containers, run

docker-compose down

API v1

REST API integration with Swagger and ReDoc.

Usage

• Endpoint to authenticate and get token: /api/v1/auth-token/

Once authenticated, use header in all requests: Authorization: Token <ApiKey>

Swagger

ReDoc

Endpoints

• A JSON view of the API specification at /swagger.json
• A YAML view of the API specification at /swagger.yaml
• A swagger-ui view of the API specification at /swagger/
• A ReDoc view of the API specification at /redoc/

TLS

Pre-requirements

• Add the certificates into nginx/ssl
• To generate a self-signed certificate:

• openssl req -x509 -nodes -days 1 -newkey rsa:4096 -subj “/C=ES/ST=Madrid/L=Madrid/O=Example/OU=IT/CN=localhost” -keyout nginx/ssl/nginx.key -out nginx/ssl/nginx.crt

Nginx configuration

• TLS – port 443: nginx/app_tls.conf
• Standard – port 8888: nginx/app.conf

Docker configuration

By default, there is a volume in docker-compose.yml with the configuration with 8888 available

./nginx/app.conf:/etc/nginx/conf.d/app.conf

** In production environment** use docker-compose.prod.yaml with port 443

./nginx/app_tls.conf:/etc/nginx/conf.d/app_tls.conf

Environment Variables

All the environment variables are in a .env file, there is an .env.example with all the variables needed. Also there are collected in app/config/settings.py:

CWE_URL = env(‘CWE_URL’, ‘https://cwe.mitre.org/data/definitions/’)
MALWARE_ENABLED = env(‘MALWARE_ENABLED’, True)
MALWAREDB_URL = env(‘MALWAREDB_URL’, ‘https://www.malwaredomainlist.com/mdlcsv.php’)
MALTRAILDB_URL = env(‘MALTRAILDB_URL’, ‘https://raw.githubusercontent.com/stamparm/aux/master/maltrail-malware-domains.txt’)
VIRUSTOTAL_ENABLED = env(‘VIRUSTOTAL_ENABLED’, False)
VIRUSTOTAL_URL = env(‘VIRUSTOTAL_URL’, ‘https://www.virustotal.com/’)
VIRUSTOTAL_FILE_URL = env(‘VIRUSTOTAL_FILE_URL’, ‘https://www.virustotal.com/gui/file/’)
VIRUSTOTAL_API_URL_V3 = env(‘VIRUSTOTAL_API_URL_V3’, ‘https://www.virustotal.com/api/v3/’)
VIRUSTOTAL_URL_V2 = env(‘VIRUSTOTAL_API_URL_V2’, ‘https://www.virustotal.com/vtapi/v2/file/’)
VIRUSTOTAL_API_KEY = env(‘VIRUSTOTAL_API_KEY’, ”)
VIRUSTOTAL_UPLOAD = env(‘VIRUSTOTAL_UPLOAD’, False)
DEFECTDOJO_ENABLED = env(‘DEFECTDOJO_ENABLED’, False)
DEFECTDOJO_URL = env(‘DEFECTDOJO_URL’, ‘http://defectdojo:8080/finding/’)
DEFECTDOJO_API_URL = env(‘DEFECTDOJO_API_URL’, ‘http://defectdojo:8080/api/v2/’)
DEFECTDOJO_API_KEY = env(‘DEFECTDOJO_API_KEY’, ”)