AndroGuard Cheatsheet
Überblick
AndroGuard ist ein Python-Tool für Reverse Engineering und Malware-Analyse von Android-Anwendungen. Es bietet leistungsstarke Fähigkeiten zur Analyse von APK-Dateien, DEX Bytecode und Android-Ressourcen.
Installation
Voraussetzungen
```bash
Install Python 3.6+
sudo apt update sudo apt install python3 python3-pip
Install required dependencies
sudo apt install python3-dev libxml2-dev libxslt1-dev zlib1g-dev ```_
Installieren Sie AndroGuard
```bash
Install from PyPI
pip3 install androguard
Install with optional dependencies
pip3 install androguard[GUI,magic]
Install from source
git clone https://github.com/androguard/androguard.git cd androguard pip3 install -e . ```_
Basisnutzung
Analyse APK Dateien
```bash
Basic APK analysis
androguard analyze app.apk
Interactive analysis
androguard shell app.apk
Generate analysis report
androguard analyze app.apk --output report.txt ```_
Kommandozeilentools
```bash
APK information
apkinfo app.apk
DEX analysis
dexdump classes.dex
Resource analysis
axml AndroidManifest.xml ```_
Python API Verwendung
Basisanalyse
```python from androguard.misc import AnalyzeAPK
Analyze APK
a, d, dx = AnalyzeAPK("app.apk")
Get APK information
print("Package name:", a.get_package()) print("App name:", a.get_app_name()) print("Version:", a.get_androidversion_code()) print("Permissions:", a.get_permissions()) ```_
Erweiterte Analyse
```python from androguard.core.bytecodes import apk, dvm from androguard.core.analysis import analysis
Load APK
apk_obj = apk.APK("app.apk") dex = dvm.DalvikVMFormat(apk_obj.get_dex()) dx = analysis.Analysis(dex)
Analyze classes and methods
for cls in dx.get_classes(): print(f"Class: \\{cls.name\\}") for method in cls.get_methods(): print(f" Method: \\{method.name\\}") ```_
APK-Analyse
Grundlegende Informationen
```python
APK metadata
print("Package:", a.get_package()) print("App name:", a.get_app_name()) print("Version code:", a.get_androidversion_code()) print("Version name:", a.get_androidversion_name()) print("Min SDK:", a.get_min_sdk_version()) print("Target SDK:", a.get_target_sdk_version()) ```_
Zulassungsanalyse
```python
Get all permissions
permissions = a.get_permissions() for perm in permissions: print(f"Permission: \\{perm\\}")
Check for dangerous permissions
dangerous_perms = [ "android.permission.READ_SMS", "android.permission.SEND_SMS", "android.permission.ACCESS_FINE_LOCATION", "android.permission.CAMERA" ]
for perm in permissions: if perm in dangerous_perms: print(f"Dangerous permission found: \\{perm\\}") ```_
Analyse der Zertifikate
```python
Get certificate information
certificates = a.get_certificates() for cert in certificates: print(f"Certificate: \\{cert\\}") print(f"Subject: \\{cert.subject\\}") print(f"Issuer: \\{cert.issuer\\}") print(f"Serial: \\{cert.serial_number\\}") ```_
Code-Analyse
Methodenanalyse
```python
Find specific methods
for cls in dx.get_classes(): for method in cls.get_methods(): if "crypto" in method.name.lower(): print(f"Crypto method: \\{cls.name\\}->\\{method.name\\}") ```_
String-Analyse
```python
Extract strings
strings = dx.get_strings() for string in strings: if "http" in string.get_value(): print(f"URL found: \\{string.get_value()\\}") ```_
Kreuzreferenzanalyse
```python
Find method calls
for method in dx.get_methods(): if method.is_external(): continue
for ref in method.get_xref_from():
print(f"\\\\{ref.class_name\\\\}->\\\\{ref.method_name\\\\} calls \\\\{method.name\\\\}")
```_
Sicherheitsanalyse
Kryptographische Analyse
```python
Find crypto usage
crypto_methods = [ "javax.crypto.Cipher", "java.security.MessageDigest", "javax.crypto.spec.SecretKeySpec" ]
for method in dx.get_methods(): for crypto in crypto_methods: if crypto in str(method.get_method()): print(f"Crypto usage: \\{method.name\\}") ```_
Netzwerkanalyse
```python
Find network operations
network_classes = [ "java.net.URL", "java.net.HttpURLConnection", "okhttp3.OkHttpClient" ]
for cls in dx.get_classes(): for net_class in network_classes: if net_class in str(cls): print(f"Network class: \\{cls.name\\}") ```_
Reflexionsanalyse
```python
Find reflection usage
reflection_methods = [ "java.lang.Class.forName", "java.lang.reflect.Method.invoke" ]
for method in dx.get_methods(): for ref_method in reflection_methods: if ref_method in str(method.get_method()): print(f"Reflection usage: \\{method.name\\}") ```_
Malware-Detektion
Verdächtige Muster
```python
Check for suspicious patterns
suspicious_strings = [ "getDeviceId", "getSubscriberId", "sendTextMessage", "android.intent.action.BOOT_COMPLETED" ]
strings = dx.get_strings() for string in strings: for suspicious in suspicious_strings: if suspicious in string.get_value(): print(f"Suspicious string: \\{string.get_value()\\}") ```_
Dynamische Belastungserkennung
```python
Find dynamic loading
dynamic_methods = [ "dalvik.system.DexClassLoader", "dalvik.system.PathClassLoader" ]
for method in dx.get_methods(): for dyn_method in dynamic_methods: if dyn_method in str(method.get_method()): print(f"Dynamic loading: \\{method.name\\}") ```_
Ressourcenanalyse
Analyse der Ereignisse
```python
Parse AndroidManifest.xml
manifest = a.get_android_manifest_xml() print("Manifest content:") print(manifest.toprettyxml())
Get activities
activities = a.get_activities() for activity in activities: print(f"Activity: \\{activity\\}")
Get services
services = a.get_services() for service in services: print(f"Service: \\{service\\}") ```_
Ressourcenextraktion
```python
Extract resources
for file_name in a.get_files(): if file_name.endswith('.xml'): content = a.get_file(file_name) print(f"XML file: \\{file_name\\}") ```_
Erweiterte Funktionen
Steuerungsflussanalyse
```python
Analyze control flow
for method in dx.get_methods(): if method.is_external(): continue
# Get basic blocks
for bb in method.get_basic_blocks():
print(f"Basic block: \\\\{bb\\\\}")
```_
Datenflussanalyse
```python
Trace data flow
for method in dx.get_methods(): # Get method instructions instructions = method.get_instructions() for instruction in instructions: if instruction.get_name() == "const-string": print(f"String constant: \\{instruction\\}") ```_
Rufen Sie Graph Generation
```python
Generate call graph
import networkx as nx
G = nx.DiGraph() for method in dx.get_methods(): for ref in method.get_xref_from(): G.add_edge(f"\\{ref.class_name\\}.\\{ref.method_name\\}", f"\\{method.class_name\\}.\\{method.name\\}")
Export call graph
nx.write_gml(G, "call_graph.gml") ```_
Automatisierungsskripte
Batch Analyse
```python
!/usr/bin/env python3
import os import sys from androguard.misc import AnalyzeAPK
def analyze_apk_batch(directory): for filename in os.listdir(directory): if filename.endswith('.apk'): print(f"Analyzing \\{filename\\}") try: a, d, dx = AnalyzeAPK(os.path.join(directory, filename)) print(f"Package: \\{a.get_package()\\}") print(f"Permissions: \\{len(a.get_permissions())\\}") print("-" * 50) except Exception as e: print(f"Error analyzing \\{filename\\}: \\{e\\}")
if name == "main": analyze_apk_batch(sys.argv[1]) ```_
Sicherheitsscanner
```python
!/usr/bin/env python3
from androguard.misc import AnalyzeAPK
def security_scan(apk_path): a, d, dx = AnalyzeAPK(apk_path)
# Check permissions
dangerous_perms = [
"android.permission.READ_SMS",
"android.permission.SEND_SMS",
"android.permission.ACCESS_FINE_LOCATION"
]
found_perms = []
for perm in a.get_permissions():
if perm in dangerous_perms:
found_perms.append(perm)
# Check for crypto usage
crypto_usage = False
for method in dx.get_methods():
if "crypto" in str(method.get_method()).lower():
crypto_usage = True
break
print(f"Dangerous permissions: \\\\{found_perms\\\\}")
print(f"Crypto usage detected: \\\\{crypto_usage\\\\}")
if name == "main": security_scan("app.apk") ```_
GUI Verwendung
AndroGuard GUI
```bash
Launch GUI
androguard gui
Open APK in GUI
androguard gui app.apk ```_
Eigenschaften
- Visuelle Codeanalyse
- Interaktive Exploration
- Graphische Visualisierung
- Exportfähigkeiten
Best Practices
Analyse-Workflow
bash
1. Basic APK information
2. Permission analysis
3. Code structure review
4. Security pattern detection
5. Malware signature matching
6. Report generation_
Leistungsspitzen
```python
Use lazy loading for large APKs
from androguard.core.bytecodes.apk import APK a = APK("large_app.apk", raw=False)
Process in chunks for batch analysis
import multiprocessing pool = multiprocessing.Pool() results = pool.map(analyze_apk, apk_list) ```_
Ressourcen
- *offizielle Dokumentation: (AndroGuard GitHub) (LINK_3)
- API Referenz: AndroGuard Dokumentation
- Android Security: [OWASP Mobile Security](_LINK_3__