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QAREN Cheatsheet

Überblick

QARK (Quick Android Review Kit) ist ein statisches Analyse-Tool, um für mehrere Sicherheits-bezogene Android-Anwendung Schwachstellen, entweder in Quellcode oder verpackt APKs suchen.

Installation

Voraussetzungen

```bash

Install Python 3.6+

sudo apt update sudo apt install python3 python3-pip

Install Java 8+

sudo apt install openjdk-8-jdk

Install Android SDK (optional but recommended)

```_

QARK installieren

```bash

Install from PyPI

pip3 install qark

Or install from source

git clone https://github.com/linkedin/qark.git cd qark pip3 install -e . ```_

Basisnutzung

Analyse APK Datei

```bash

Basic APK analysis

qark --apk /path/to/app.apk

Analyze with custom output directory

qark --apk /path/to/app.apk --output-dir /path/to/output

Generate detailed report

qark --apk /path/to/app.apk --report-type html ```_

Analyse des Quellcodes

```bash

Analyze Android source code

qark --source /path/to/android/project

Analyze specific Java files

qark --java /path/to/java/files

Analyze with custom rules

qark --source /path/to/project --custom-rules /path/to/rules.json ```_

Kommandozeilenoptionen

Grundlegende Optionen

```bash

Show help

qark --help

Show version

qark --version

Verbose output

qark --apk app.apk --verbose

Quiet mode

qark --apk app.apk --quiet ```_

Analyseoptionen

```bash

Skip specific checks

qark --apk app.apk --skip-checks "check1,check2"

Include only specific checks

qark --apk app.apk --include-checks "check1,check2"

Set minimum severity level

qark --apk app.apk --min-severity medium

Enable experimental features

qark --apk app.apk --experimental ```_

Ausgabeoptionen

```bash

Generate HTML report

qark --apk app.apk --report-type html

Generate JSON report

qark --apk app.apk --report-type json

Generate XML report

qark --apk app.apk --report-type xml

Custom output file

qark --apk app.apk --output-file report.html ```_

Sicherheitsüberprüfungen

Gemeinsame Schwachstellen Entdeckt

```bash

SSL/TLS Issues

  • Weak SSL/TLS configurations
  • Certificate validation bypasses
  • Insecure hostname verification

Data Storage Issues

  • Insecure data storage
  • Unencrypted databases
  • Sensitive data in logs

Authentication Issues

  • Weak authentication mechanisms
  • Hardcoded credentials
  • Insecure session management

Communication Issues

  • Unencrypted communications
  • Weak cryptographic implementations
  • Insecure network protocols ```_

Zollvorschriften

json \\\\{ "rules": [ \\\\{ "id": "custom_rule_1", "name": "Custom Security Check", "description": "Checks for custom security issue", "severity": "high", "pattern": "regex_pattern_here" \\\\} ] \\\\}_

Erweiterte Nutzung

Batch Analyse

```bash

Analyze multiple APKs

for apk in *.apk; do qark --apk "$apk" --output-dir "results_$(basename "$apk" .apk)" done

Parallel analysis

find . -name "*.apk"|xargs -P 4 -I \\{\\} qark --apk \\{\\} ```_

Integration von CI/CD

```bash

Jenkins pipeline example

qark --apk app.apk --report-type json --output-file qark_report.json if [ $? -eq 0 ]; then echo "QARK analysis completed successfully" else echo "QARK analysis failed" exit 1 fi ```_

Filterergebnisse

```bash

Filter by severity

qark --apk app.apk --min-severity high

Filter by category

qark --apk app.apk --include-checks "ssl,crypto,storage"

Exclude false positives

qark --apk app.apk --exclude-patterns "test,debug" ```_

Bericht Analyse

Severity Levels verstehen

```bash

Critical - Immediate security risk

High - Significant security risk

Medium - Moderate security risk

Low - Minor security concern

Info - Informational finding

```_

Gemeinsame Probleme und Fixes

```bash

SSL Certificate Validation

Issue: Disabled certificate validation Fix: Implement proper certificate validation

Hardcoded Secrets

Issue: API keys in source code Fix: Use secure configuration management

Insecure Data Storage

Issue: Unencrypted sensitive data Fix: Implement proper encryption ```_

Konfiguration

Datei konfigurieren

json \\\\{ "output_dir": "./qark_output", "report_type": "html", "min_severity": "medium", "skip_checks": [], "include_checks": [], "custom_rules": "./custom_rules.json" \\\\}_

Umweltvariablen

```bash

Set QARK configuration

export QARK_CONFIG=/path/to/config.json

Set Android SDK path

export ANDROID_HOME=/path/to/android/sdk

Set Java home

export JAVA_HOME=/path/to/java ```_

Fehlerbehebung

Gemeinsame Themen

```bash

Java not found

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

Android SDK issues

export ANDROID_HOME=/path/to/android/sdk export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools

Permission issues

chmod +x qark sudo chown -R $USER:$USER ~/.qark ```_

Debug Mode

```bash

Enable debug logging

qark --apk app.apk --debug

Verbose output with stack traces

qark --apk app.apk --verbose --debug ```_

Best Practices

Sicherheitsprüfung Workflow

```bash 1. Static Analysis with QARK qark --apk app.apk --report-type html

  1. Review findings and prioritize fixes

  2. Dynamic testing with other tools

  3. Re-test after fixes qark --apk fixed_app.apk --compare baseline_report.json ```_

Integration Tipps

```bash

Automate with scripts

!/bin/bash

APK_FILE=$1 OUTPUT_DIR="qark_$(date +%Y%m%d_%H%M%S)" qark --apk "$APK_FILE" --output-dir "$OUTPUT_DIR" --report-type html echo "Report generated in $OUTPUT_DIR"

Use with other security tools

qark --apk app.apk && \ mobsf_scan app.apk && \ drozer_scan app.apk ```_

Ressourcen

  • Amtliche Dokumentation*: [QARK GitHub](__LINK_3____ -%20Sicherheitsrichtlinien:%20[OWASP%20Mobile%20Security](_LINK_3___ -%20Android%20Security*:%20Android%20Security%20Best%20Practices