Someone found a weird microcontroller sitting on the desk when they walked into the office this morning. They reckoned it was a challenge, so made an image of flash and sent it your way. Good luck!
flash.bin
flash.binが何のファイルかわからないがstringsは便利だった。
$ file flash.bin
flash.bin: data
$ strings flash.bin | grep ractf
ractf{Fl4shDump5Ar3VeryFun!!}