Cloudflare Deobfusactor

A dynamic deobfuscator for cloudflare's antibot javascript challenge

Features

1. Unconceals String Conceals

c('0x19e')

// output

"length"

2. Unflattens Control Flow Flattening Protection

_[_[1]] = _[1]


for (; _[0];) switch (_[_[1]]) {
        case _[2]:
            console.log("2")
            return


        case _[1]:
            console.log("1")
            _[_[1]] = _[2]
            break
        

}
// output
console.log("1")
console.log("2")

3. Simplifies Proxy Binary Functions

WEGiQ = function (I, J) {
      return I + J;
    }
WEGiQ(d._cf_chl_opt.cRay, "_")

// Simplifies to 
d._cf_chl_opt.cRay + "_"

Usage

Paste the challenge script into input/main_challenge.js

Run

npm install
npm start