Avilla Forensics: The Free Mobile Forensic Tool That Cracks Android 12/13 Vulnerabilities – No Root Required + Video

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Introduction:

Mobile device forensics is increasingly critical as encrypted smartphones become the primary evidence source in cybercrime investigations. Avilla Forensics, launched in February 2021 by Daniel Avilla, offers investigators a free, powerful alternative to commercial suites. This tool leverages Android Debug Bridge (ADB) and actively exploits known vulnerabilities in Android 12 and 13 to extract application data, secondary user profiles, and even perform APK downgrades – all without root access. Its version 3.7 integrity system, using AES-256 encrypted logs with HMAC signatures, ensures that extracted evidence remains tamper-proof and court-admissible.

Learning Objectives:

  • Master the installation and configuration of Avilla Forensics on Windows 10/11 for Android device acquisition
  • Execute APK downgrade attacks and exploit Android 12/13 vulnerabilities to extract full app data from the DATA partition
  • Validate forensic evidence integrity using AES-256 hashes and HMAC signatures within .avilla log files

You Should Know:

  1. Setting Up Avilla Forensics and ADB Environment on Windows

Avilla Forensics runs exclusively on Windows 10 and 11, relying on ADB for device communication. Before launching the tool, you must properly configure the ADB environment and enable developer options on the target Android device.

Step‑by‑step guide:

1. Download ADB Platform Tools

2. Add ADB to System PATH

  • Open Command Prompt as Administrator
  • Run: 
    setx PATH "%PATH%;C:\adb" /M
  • Verify: `adb version`
  1. Enable Developer Options & USB Debugging on Android

– Go to Settings → About Phone → Tap “Build Number” 7 times
– Settings → System → Developer Options → Enable USB Debugging

4. Install Avilla Forensics

  • Download from official repository (verify checksums)
  • Extract to `C:\AvillaForensics`
  • Run `AvillaForensics.exe` as Administrator

5. Test ADB Connection

  • Connect Android device via USB
  • Run: `adb devices`
  • Accept RSA fingerprint on device
  • Expected output: 
    List of devices attached
XXXXXXXX device

Troubleshooting: If device shows “unauthorized”, revoke USB debugging authorizations on the phone and reconnect.

  1. Performing an APK Downgrade Attack (No Root Required)

APK downgrading forces an installed app to revert to an older, vulnerable version. This technique allows extraction of data that newer versions encrypt or restrict. Avilla Forensics automates this for supported applications.

Step‑by‑step guide:

1. Identify target app package name

– `adb shell pm list packages | findstr “target”`

2. Backup current app data (optional but recommended)

– `adb backup -f backup.ab -apk -obb com.example.app`

3. Use Avilla Forensics APK downgrade module

  • In the tool: Navigate to “Exploitation” → “APK Downgrade”
  • Select target app from the list
  • Choose the older APK version (tool provides database of vulnerable versions)

4. Manual downgrade via ADB (if needed)

  • Download older APK to `C:\old.apk`
  • Uninstall newer version: `adb uninstall com.example.app`
  • Install old version: `adb install -r -d C:\old.apk`
  • Block auto‑updates: `adb shell pm disable com.android.vending`

5. Extract data after downgrade

– `adb shell run-as com.example.app cat /data/data/com.example.app/databases/app_data.db > extracted.db`

Forensic note: Document every command executed. The .avilla log file automatically records these actions with HMAC signatures for chain‑of‑custody.

  1. Exploiting Android 12 & 13 Vulnerabilities for Deep Data Extraction

Avilla Forensics leverages known Android 12/13 security flaws (e.g., CVE-2022-20465, Dirty Pipe) to access protected directories without root. These exploits allow read/write access to the DATA partition where user app data resides.

Step‑by‑step guide:

1. Run vulnerability scanner within Avilla Forensics

  • Tools → “Android Vulnerability Check”
  • Output lists exploitable CVEs on the connected device
  1. For Android 12 (CVE-2022-20465 – Bluetooth privilege escalation)

– Enable Bluetooth on device
– In Avilla: Exploitation → “CVE-2022-20465” → Execute
– Tool drops a temporary shell with elevated privileges

3. For Android 13 (Dirty Pipe – CVE-2022-0847)

  • Requires kernel version 5.8+
  • Avilla automates the exploit: 
    adb push dirtypipe /data/local/tmp/
adb shell chmod 755 /data/local/tmp/dirtypipe
adb shell /data/local/tmp/dirtypipe /data/data/com.target.app/

4. Extract secondary user profiles (Work Profile, Guest)

  • After exploitation, run: 
    adb shell ls /data/user/ (lists user IDs)
adb shell run-as --user 10 com.target.app cat /data/user/10/com.target.app/db/file

5. Verify extracted data integrity

  • Avilla generates `.avilla` log with SHA‑256 hashes
  • Validate manually: 
    certutil -hashfile extracted_data.bin SHA256
  • Compare against hash in the .avilla file

Warning: Exploitation may crash unstable apps. Always perform acquisition on a forensic copy or in airplane mode to prevent remote wiping.

  1. Full App Data Extraction from the DATA Partition and Multi‑Device Acquisition

Avilla Forensics v3.7 introduces parallel acquisition from multiple Android devices and complete imaging of the DATA partition – bypassing Android’s per‑app sandbox.

Step‑by‑step guide:

1. Connect multiple devices

  • Up to 4 devices via USB hub
  • Verify with `adb devices -l` (note serial numbers)

2. Select “Multi‑Device Mode” in Avilla

  • Assign each device to a separate extraction job
  • Tool parallelizes ADB commands using threading

3. Perform full DATA partition imaging

  • Exploit must be active (from section 3)
  • Avilla command equivalent: 
    adb exec-out dd if=/dev/block/by-name/userdata 2>/dev/null | dd of=data_partition.img
  • Image size can exceed 64GB – ensure adequate storage

4. Mount and analyze the extracted image

  • Windows: Use Arsenal Image Mounter or FTK Imager
  • Linux: 
    sudo mount -o loop,ro data_partition.img /mnt/data

5. Carve deleted app data

  • After mounting, run `photorec` or `scalpel` on the image
  • Target SQLite WAL files and application caches

Pro tip: Enable “Integrity Logging” before acquisition. Each device’s extraction is recorded in a separate .avilla file with unique HMAC signatures.

  1. Validating Forensic Integrity with AES-256 Encrypted .avilla Logs

Avilla Forensics v3.7 creates encrypted log files containing every action’s timestamp, data hashes, and HMAC signatures. This ensures the evidence hasn’t been altered post‑acquisition – critical for court presentation.

Step‑by‑step guide:

1. Locate the .avilla log after extraction

  • Default path: `C:\AvillaForensics\logs\extraction_ 
    .avilla`
</li>
</ul>

<ol>
<li>Decrypt and inspect the log (requires tool’s private key – Avilla provides a viewer) </li>
</ol>

- Open Avilla → “File” → “Open Log” → select .avilla file 
- Viewer displays: 
- Each ADB command executed 
- SHA‑256 hash of every extracted file 
- HMAC‑SHA256 signature covering log entries

<ol>
<li>Manual verification using Python (if you have the key) 
[bash]
import hashlib, hmac, json
Load encrypted log (simplified example)
with open('extract.avilla', 'rb') as f:
encrypted_data = f.read()
Decrypt using AES-256 (requires key from tool)
Then verify HMAC
expected_hmac = encrypted_data[-32:]
computed_hmac = hmac.new(key, decrypted_log, hashlib.sha256).digest()
assert computed_hmac == expected_hmac
print("Integrity verified")

    • 4. Export log as PDF for legal submission

    • Avilla: “Export” → “Forensic Report (PDF)”
    • Includes hashes, HMAC values, and tool version info

    5. Cross‑validate with external hash

    • Compute hash of extracted file independently: 
      Get-FileHash extracted_data.bin -Algorithm SHA256
    • Compare with hash inside decrypted log

    Why AES-256? The encryption prevents tampering with the log itself. Even if an attacker modifies the extracted data, the mismatched hash in the encrypted log reveals the alteration.

    6. Automating Acquisition with Avilla CLI (Advanced Users)

    While Avilla Forensics provides a GUI, version 3.7 includes an undocumented command‑line interface for scripting and repeatable acquisitions – ideal for forensic labs processing multiple devices.

    Step‑by‑step guide:

    1. Launch Avilla CLI

    • From installation folder: `AvillaForensics.exe –cli`

    2. Basic acquisition command

    acquire --device <serial> --mode full --output C:\cases\case001\

    3. Target specific apps

    acquire --device <serial> --apps com.whatsapp,com.instagram --vuln auto

    4. Generate integrity report only

    verify --log C:\cases\case001.avilla --report report.pdf

    5. Schedule acquisition (using Windows Task Scheduler)

    • Create batch file auto_acquire.bat: 
      @echo off
C:\AvillaForensics\AvillaForensics.exe --cli --device %1 --mode smart --output C:\acquisitions\%date:~10,4%%date:~4,2%%date:~7,2%\
    • Register task: 
      schtasks /create /tn "AvillaNightly" /tr "C:\auto_acquire.bat" /sc daily /st 02:00

    Limitation: CLI mode does not support multi‑device acquisition yet; use GUI for parallel extractions.

    What Undercode Say:

    • Key Takeaway 1: Avilla Forensics democratizes mobile forensics by offering enterprise‑grade features (AES‑256 integrity, APK downgrade, exploit chaining) completely free – a game changer for smaller investigative teams and independent researchers.

    • Key Takeaway 2: The tool’s reliance on unpatched Android 12/13 vulnerabilities highlights a critical reality: many devices remain vulnerable months after CVEs are disclosed. Forensic tools exploit this, but so can malware – emphasizing the need for timely security updates.

    • Analysis: Avilla Forensics v3.7 bridges the gap between commercial solutions like Cellebrite (costly) and open‑source scripts (unreliable). Its encrypted logging and HMAC signatures provide legal defensibility, while the multi‑device feature boosts lab efficiency. However, investigators must understand ADB internals and Android security boundaries to avoid corrupting evidence. The tool’s continued evolution (Android 14/15 support announced) suggests it will become a standard in DFIR toolkits. One caution: automated exploitation can trigger device lockdowns (e.g., after too many failed attempts). Always test in a sandboxed environment first.

    Prediction:

    As Android manufacturers extend update cycles (or abandon devices entirely), forensic tools like Avilla will increasingly rely on vulnerability exploitation rather than legitimate APIs. Within 18 months, we predict: (1) Avilla or a fork will add AI‑driven exploit selection – automatically choosing the best CVE based on device build fingerprint. (2) Cloud‑based multi‑device orchestration will emerge, allowing simultaneous remote acquisitions over MQTT or WebRTC. (3) Law enforcement agencies will face legal challenges over using “active exploitation” tools, leading to new digital evidence admissibility standards. Finally, Google will harden the ADB authorization model, possibly requiring per‑session keys – forcing forensic tools to move toward bootloader‑level extraction. For now, Avilla Forensics represents the cutting edge of accessible mobile forensics.

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