rev-dex-dumper
Dump DEX files from a running Android app for unpacking/deobfuscation. Activate when the user wants to unpack an Android APK, dump DEX from memory, extract decrypted DEX files, or defeat class-loading packing.
What this skill does
# rev-dex-dumper - Android DEX Dumper
Dump DEX files from a running Android application's memory using `panda-dex-dumper` via ADB.
---
## Tool Location
The `panda-dex-dumper` binary is bundled in this skill's directory. Resolve its absolute path relative to this SKILL.md file:
```
skills/rev-dex-dumper/panda-dex-dumper
```
---
## Workflow
### 1. Push the tool to device
```bash
adb push <path-to>/panda-dex-dumper /data/local/tmp/
adb shell chmod +x /data/local/tmp/panda-dex-dumper
```
### 2. Determine target package name
If the user provides a package name, use it directly. Otherwise, get the foreground app:
```bash
adb shell dumpsys activity top | grep 'ACTIVITY' | tail -1 | awk '{print $2}' | cut -d/ -f1
```
### 3. Run the dumper
```bash
adb shell "cd /data/local/tmp && ./panda-dex-dumper -p $(adb shell pidof <package_name>)"
```
The dumped DEX files are saved to `/data/local/tmp/panda/` on the device.
### 4. Pull DEX files to host
```bash
adb pull /data/local/tmp/panda/ ./
```
Pull to the user's current working directory.
### 5. Clean up device cache
```bash
adb shell rm -rf /data/local/tmp/panda/
adb shell rm /data/local/tmp/panda-dex-dumper
```
---
## Guidelines
1. **Always verify ADB connection first** — run `adb devices` and confirm a device is listed before proceeding.
2. **Root may be required** — `panda-dex-dumper` uses `ptrace` to attach to the target process. If the device is not rooted, the dump will fail. Suggest `adb root` or running via `su` if needed.
3. **Wait for app to fully load** — if the user is dumping a packed app, the real DEX is only available after the packer's class loader has decrypted it. Advise the user to navigate past the splash screen before dumping.
4. **Handle pidof failure** — if `pidof` returns empty, the app may not be running. Launch it first with `adb shell monkey -p <package_name> -c android.intent.category.LAUNCHER 1`.
5. **Multiple DEX files are normal** — packed apps often produce several DEX files. All files in `/data/local/tmp/panda/` should be pulled.
6. **Always clean up** — remove both the dumped DEX files and the tool binary from the device after pulling results to avoid leaving artifacts.
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