js_locky_decode.py

import re

filename = 'SCAN000189077.js'

with open(filename, 'r') as file:
    data = file.read().split('\n')

for str in data:
	uMatch = re.findall('\\\u[0-9]{3}[0-9a-fA-F]{1}', str)
	for u in uMatch:
		str = str.replace(u, u.decode('unicode-escape'))
	print (str)