There are at least two artists that use this name:

1. Knaster were a Swedish electronic music quartet who described themselves as playing "organic electronic". They released one album, entitled No. 3 (or Final on Spotify), in 2013. Two of the tracks from this album, Kingdom and Lisa, were featured in the video game The Great Work by developer Nicklas "Nifflas" Nygren. It is unknown whether the group are still together.

https://knaster.bandcamp.com

2. With Max Määttä in the front, this young and hyped punkband from Eskilstuna, Sweden, is ready to walk all the way to the top! The band was formed the 30th of August 2006 and recently released their first demo called "Skrik! EP" (which means "Scream! EP"). Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.