materialuiupgraded/packages/material-ui-icons/src/StopRounded.js

Material-UI's workspace package

import React from 'react';
import createSvgIcon from './utils/createSvgIcon';

export default createSvgIcon(
  <React.Fragment><path d="M8 6h8c1.1 0 2 .9 2 2v8c0 1.1-.9 2-2 2H8c-1.1 0-2-.9-2-2V8c0-1.1.9-2 2-2z" /></React.Fragment>
, 'StopRounded');