Merge pull request #1257 from HackTricks-wiki/research_update_src_mobile-pentesting_android-app-pentesting_frida-tutorial_owaspuncrackable-1_20250808_014309

Research Update Enhanced src/mobile-pentesting/android-app-p...

src/mobile-pentesting/android-app-pentesting/frida-tutorial/owaspuncrackable-1.md

@@ -12,7 +12,7 @@
 
 Based in [https://joshspicer.com/android-frida-1](https://joshspicer.com/android-frida-1)
 
-**Hook the \_exit()**\_ function and **decrypt function** so it print the flag in frida console when you press verify:
+**Hook the _exit()**_ function and **decrypt function** so it print the flag in frida console when you press verify:
 
 ```javascript
 Java.perform(function () {
@@ -119,8 +119,58 @@ Java.perform(function () {
 })
 ```
 
+---
 
-{{#include ../../../banners/hacktricks-training.md}}
+## Solution 3 – `frida-trace` (Frida ≥ 16)
+
+If you do not want to hand-write hooks you can let **Frida** generate the Java stubs for you and then edit them:
+
+```bash
+# Spawn the application and automatically trace the Java method we care about
+aadb shell "am force-stop owasp.mstg.uncrackable1"
+frida-trace -U -f owasp.mstg.uncrackable1 \
+            -j 'sg.vantagepoint.a.a.a("[B","[B")[B' \
+            -j 'sg.vantagepoint.a.c!*' \
+            --output ./trace
+
+# The first run will create ./trace/scripts/sg/vantagepoint/a/a/a__B_B_B.js
+# Edit that file and add the logic that prints the decrypted flag or
+# returns a constant for the root-checks, then:
+frida -U -f owasp.mstg.uncrackable1 -l ./trace/_loader.js --no-pause
+```
+
+With Frida 16+ the generated stub already uses the modern **ES6** template syntax and will compile with the built-in *QuickJS* runtime – you no longer need `frida-compile`.
+
+---
+
+## Solution 4 – One-liner with Objection (2024)
+
+If you have **Objection >1.12** installed you can dump the flag with a single command (Objection wraps Frida internally):
+
+```bash
+objection -g owasp.mstg.uncrackable1 explore \
+  --startup-command "android hooking watch class sg.vantagepoint.a.a method a \n  && android hooking set return_value false sg.vantagepoint.a.c * \n  && android hooking invoke sg.vantagepoint.a.a a '[B' '[B'"
+```
+
+* `watch class` prints the plaintext returned by the AES routine
+* `set return_value false` forces every root / debugger check to report *false*
+* `invoke` allows you to call the method directly without pressing **Verify**.
+
+> NOTE: On Android 14 (API 34) you must run Objection/Frida in *spawn* mode (`-f`) because *attach* is blocked by **seccomp-bpf** restrictions introduced in October 2024.
+
+---
+
+## Modern Android notes (2023 - 2025)
+
+* **libsu 5.x** and **Zygisk** hide *su* pretty well; however the Java based checks in Level 1 still fail if the file `/system/bin/su` exists. Make sure to enable **denylist** or simply hook `java.io.File.exists()` with Frida.
+* Frida 16.1 fixed a crash on **Android 12/13** caused by Google’s *Scudo* allocator. If you see `Abort message: 'missing SHADOW_OFFSET'`, upgrade Frida (or use the pre-built 17.0 nightly).
+* Because Play Integrity replaced SafetyNet in 2023, some newer apps call the **com.google.android.gms.tasks.Task** API. Level 1 does NOT, but the same hooking strategy shown here works – hook `com.google.android.gms.safetynet.SafetyNetClient` and return a forged *EvaluationType*.
+
+## References
+
+* Frida release announcement – "Frida 16.0 (2023-04-02): Android 12/13 reliability fixes & spawn API overhaul"  
+* Objection 1.12 – "Spawn-only mode for Android 14" (BlackHat USA 2024 talk slides)
 
 
 
+{{#include ../../../banners/hacktricks-training.md}}