Is it possible for a website to detect that we are using Selenium with ChromeDriver

Question

I am using Selenium with Chrome driver and I noticed that some web pages can detect that I am using Selenium. I always get a page like "suspicious activity was detected". I have checked it with my user agent and it is exactly identical to chrome

When I normally use the chrome browse everything is fine, but whenever I use Selenium I'm detected.

Answer 1

Selenium tests for pre-defined javascript variables which appear when executing selenium. 

The detection scripts usually have word like "selenium" / "webdriver" in any of the variables and also the document variables called $cdc_ and $wdc_. All these depends on the browser you are using. Different browsers expose different things.

I used chrome all that I had to do was to ensure that $cdc_ didn't exist anymore as document variable, also download chrome driver source code, modify chrome driver and re-compile $cdc_ with different names.