The easiest way is to always use a DNS whitelist firewall on a external device on your network. It is a pain in the ass to manage that list, but you’ll log and block every unexpected connection.
Otherwise, you can do a basic grep for “http” in the source, or even by scanning a binary for strings. This vector is easily mitigated by an attacker using encryption or a simple cypher, but it will catch a lot of script kiddies.














99.999% of advertising is shit to make a rich person feel like they are doing something to drive business.
Like dude owned the first bike shop I worked at was paying a bunch to place ads on various platforms. I asked if he had ever actually tested that it works. He just gave me a puzzled look. I told him simply pick any product you feel is universally in high demand and try and give it away with no strings attached. See how long it takes to get someone to show up and claim the thing. It took 3 weeks and I am nearly certain the person that showed up was one of his personal friends. We stopped advertising online after that. Ads may increase awareness in some cases, but they are mostly ineffective media. People are just too stupid to be objective and actually test things; instead assuming the existence of the option to advertise validates its efficacy