Subdomains are useful as they help domain owners organize their websites. They identify specific pages on a company’s site, guiding customers and internal and external users to where they will find the information they need or product they wish to buy.
But while using subdomains indeed has advantages, it has disadvantages as well. Cybercriminals can use them for malicious campaigns that rely on subdomain takeovers, among other cyberattacks. Threat actors can also create subdomains and hide them under what seems to be totally legitimate domains to evade detection.
Subdomain-related threats are addressable, at least to some extent, with the help of a subdomain finder that enumerates the subdomains of a particular domain. This post explains how to go about it.