solve.js

#!/usr/bin/env node

const crypto = require('crypto')
const { load } = require('all-package-names')

const for_future_me = 'cGFzc3dvcmRfaXNfdGhlX25hbWVfb2Zfb25lX25wbV9wYWNrYWdl' // password_is_the_name_of_one_npm_package

let encryptedData = '83729c4575f56a8287c0b4e8ee5c33f8cb891ccaddcafb71ef5f7bd067f19d854ab16e0cb22460'

try {
  function decrypt(password) {
    const decipher = crypto.createDecipher('aes-256-ctr', password)
    return decipher.update(encryptedData, 'hex', 'utf8') + decipher.final('utf8')
  }

  load().then(({ packageNames }) => {
    const packageName = packageNames.find(name => decrypt(name).includes('HTB{'))
    console.log(packageName, decrypt(packageName))
  })
} catch (error) {}