Script that goes with Python Scripter Burp Extension - every request passed through burp has a random User-Agent. Inspired by Marcin Wielgoszewski (@marcin) https://portswigger.net/bappstore/eb563ada801346e6bdb7a7d7c5c52583. Also inspired by Tim Tomes' (@lanmaster53) example scripts for Python Scripter https://gist.github.com/lanmaster53/3d86836…

random_user-agent.py

import random

header_names = ['User-Agent']

ua = ['Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36', 'Mozilla/5.0 (Linux; Android 6.0; CAM-L21 Build/HUAWEICAM-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36']

if (messageIsRequest):
        request = helpers.analyzeRequest(messageInfo)
        headers = request.getHeaders()
        for header_name in header_names:
            for header in headers:
                if header.startswith(header_name):
                    headers.set(headers.index(header), 'User-Agent: ' + random.choice(ua))
                    break
        body = messageInfo.getRequest()[request.getBodyOffset():]
        new_request = helpers.buildHttpMessage(headers, body)
        messageInfo.setRequest(new_request)
        #print(helpers.bytesToString(new_request))