Windows Phone Xap Archive Full [exclusive]

Technical Report: Windows Phone XAP Archive Format

d) Lumia Firmware Dumps (FFU images)

• Extracting XAPs from Lumia FFU files (Windows Phone 8.1 Update 2 or 10 Mobile).
• Contains preloaded OEM apps not available in the store.

8. Best Practices for Full Extraction and Analysis

• Always keep original XAP intact; work on copies.
• Use automated tooling to list and verify checksums of extracted files.
• Preserve manifest and capability information.
• When analyzing third-party code, check licensing before reuse.
• Document versions and architectures present in the XAP.

Paper: Understanding the Windows Phone XAP Archive Format and Its Full Extraction

4.2 Capabilities Security Model

Capabilities are declared in WMAppManifest.xml. They are enforced at runtime by the sandbox. Common capabilities include:

| Capability | Access | |------------|--------| | ID_CAP_NETWORKING | HTTP, sockets | | ID_CAP_LOCATION | GPS/geolocation | | ID_CAP_WEBBROWSERCOMPONENT | WebBrowser control | | ID_CAP_MEDIALIB | Read music/pictures library | | ID_CAP_PHONEDIALER | Initiate phone call | | ID_CAP_IDENTITY_DEVICE | Read device unique ID | | ID_CAP_CONTACTS | Access contacts database | windows phone xap archive full