This is the Biuro icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
This looks like three rectangles on top of each other. The very top one is smaller and longer. The two bottom ones have a line in the center of them, going horizontal. There are two tiny squares on the bottom of the bottom rectangle, on the edges.