With a rustling sound; rummaging around — an onomatopoeia for small rustling noises or restless searching movements.
引き出しの中をごそごそ探して、古い写真を見つけた。
I rummaged through the drawer and found an old photo.
夜中に物音がして、床の上をごそごそ歩く音が聞こえた。
There was a noise at night; I heard someone rustling around on the floor.
子どもがおもちゃ箱をごそごそあさっている。
A child is rummaging through the toy box.