Hiding text in files

Awhile back I was looking at some malicious stuff that showed up on someone’s server and one of the tricks they did was to hide a bunch of javascript in template files. If you catted the file or viewed it in nano you saw nothing. View it in vi and poof, bunch of malicious code.

Thought it was kind of cool but didn’t take notes or keep samples. Year later I find a need for this for a project. Google searches were somewhat unhelpful since all manner of stupid stuff matches.

Anyone know what the method is called so I can do more research?

submitted by /u/FantasticThing359
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