How do I unobfuscate javascript file?

521 Asked by NaveenYadav in Java , Asked on Oct 12, 2022

I'm having serious problems deobfuscating a JavaScript file at work. This file is inside a web app that I was left in charge of to improve it. The problem is that I can do it without having access to this file and the previous programmer that obfuscated it is not reachable.

I tried many ways of deobfuscation but none worked.

Answered by Naveen Raj

There are a few tools that you might try when wanting to analyse [removed]

JSDetox

Malzilla

JavaScript Deobfuscator

ExtractScript

JS-Beautifier

JS-Unpack (see also blog)

Rhino Debugger

Firebug

SpiderMonkey

JSNice

See also a few tutorials on analysing unobfuscate [removed]

Analysing Malicious JavaScript by Dejan Lukan.

Advanced obfuscated JavaScript analysis by Daniel Wesemann.

JavaScript Obfuscation on InfoSec Handlers Diary Blog.

JavaScript Obfuscation - Manual Armour (part 1, part 2) by Aditya K Sood.

How do I unobfuscate javascript file?

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