If Dogecoin is still a joke, it might just be the best joke on the Internet. At first, the cryptocurrency seemed like nothing but a silly meme taken to its logical extreme, but one hacker discovered a way to install an illicit coin-mining operation on network-attached storage (NAS) devices, netting him more than $600,000 in Dogecoin.

Pat Litke and David Shear, two security researchers at Dell, wrote a blog post explaining how they discovered the scheme. Users who purchased Synology products, a brand of easy-to-use, relatively inexpensive Taiwanese NAS devices popular with small-office and home-office users,  complained of slow performance and excessive heat.

Tracking these oddities to their source, users discovered a folder on the NAS devices called, appropriately enough, PWNED. This folder was up to its cold, wet snout with Dogecoin-mining malware.