AuraLookup
AuraLookup is the name of a piece of potentially unwanted software. It can affect Mac computers.
AuraLookup has a lot of similarities to browser hijackers. It is able to inject ads into the pages you visit. The software can also change your browser's home page and default search engine.
Doing any of those things without the user's explicit consent and knowledge is considered undesirable behavior. While potentially unwanted software is not as dangerous as full-blown malware, it will still impair and diminish your user experience.
The most common way potentially unwanted software can get on your computer is through bundle installers, also known as software bundles. Those are packages of several applications, often containing at least one legitimate app. Along with it, inside the same installer, there can be one or more potentially unwanted apps that install along with the flagship app you likely went online to search for.
This process is called bundling and similar bundle installers containing potentially unwanted applications are often found on less reputable free download portals and websites.
To stay safe from similar issues and bundle installers, it is recommended to always use a well-known and strictly curated download portal for all your software. The Apple store is your best choice if you are using a Mac.