QuarkDrainer was linked to the Greenfield Wallet ad that drained my ETH

I clicked an Instagram advertisement for Greenfield Wallet, which looked like a polished secure-wallet service. I connected my wallet to register and then saw about $9,400 in ETH disappear almost immediately.

I later received information linking the setup to QuarkDrainer. The site looked credible enough that I did not expect connecting a wallet would lead to a drain, so I am preserving the experience for others researching this name.