TypeError: Cannot set properties of null (setting 'parentNode')

[Ogyeet10]

TypeError when deobfuscating with Restringer

Description

Encountering a TypeError: Cannot set properties of null (setting 'parentNode') when attempting to use Restringer for deobfuscation.

Source File

Link to the source file

Steps to Reproduce

1. Loaded the obfuscated source file into Restringer
2. Attempted to run the deobfuscation process
3. Error occurs during the DOM manipulation phase

Error Message

TypeError: Cannot set properties of null (setting 'parentNode')

Additional Notes

The error suggests Restringer is trying to set a parentNode property on a null object, likely during AST manipulation.

[fahhem]

This occurs for me as well, for a large file. Here's the full traceback for me:

!] REstringer v2.0.7
[!] Deobfuscating huck/resources/assets/www/main.60129833277c3fcd.js...
[+] Obfuscation type is function_to_array_replacements
[-] Error on iteration #0: TypeError: Cannot set properties of null (setting 'parentNode')
TypeError: Cannot set properties of null (setting 'parentNode')
    at extractNodesFromRoot (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/flast.js:137:28)
    at generateFlatAST (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/flast.js:60:10)
    at new Arborist (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/arborist.js:17:15)
    at applyIteratively (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/utils/applyIteratively.js:22:18)
    at REstringer._runProcessors (file:///home/fahhem/Downloads/jadx/node_modules/restringer/src/restringer.js:146:18)
    at REstringer.deobfuscate (file:///home/fahhem/Downloads/jadx/node_modules/restringer/src/restringer.js:130:8)
    at file:///home/fahhem/Downloads/jadx/node_modules/restringer/bin/deobfuscate.js:21:18
[-] Error on iteration #0: TypeError: Cannot set properties of null (setting 'parentNode')
TypeError: Cannot set properties of null (setting 'parentNode')
    at extractNodesFromRoot (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/flast.js:137:28)
    at generateFlatAST (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/flast.js:60:10)
    at new Arborist (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/arborist.js:17:15)
    at applyIteratively (file:///home/fahhem/Downloads/jadx/node_modules/flast/src/utils/applyIteratively.js:22:18)
    at REstringer._loopSafeAndUnsafeDeobfuscationMethods (file:///home/fahhem/Downloads/jadx/node_modules/restringer/src/restringer.js:110:13)
    at REstringer.deobfuscate (file:///home/fahhem/Downloads/jadx/node_modules/restringer/src/restringer.js:131:8)
    at file:///home/fahhem/Downloads/jadx/node_modules/restringer/bin/deobfuscate.js:21:18
[-] Nothing was deobfuscated  ¯\_(ツ)_/¯

[BenBaryoPX]

This is actually a flAST issue that was fixed in flAST v2.2.2 and will make it into REstringer in the upcoming update. Thanks for bringing this to my attention.
I'll keep this issue open until I've released the aggregated fix.

[makeusabrew]

I'm hitting this too. @BenBaryoPX anything I can do to help nudge a new release along?