metamask-extension/app/images/icons/security-user.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
  <path d="m385 94l-103-38c-17-6-44-6-61 0l-103 38c-23 9-42 37-42 62l0 152c0 24 16 56 35 71l88 65c29 22 76 22 105 0l88-65c20-15 36-47 36-71l0-152c-1-25-20-53-43-62z m-135 60c24 0 44 20 44 44 0 24-19 43-42 44l-1 0c-1 0-1 0-1 0-25-1-43-20-43-44-1-24 19-44 43-44z m46 191c-12 8-28 13-44 13-17 0-33-4-45-13-12-7-18-18-19-30 0-11 7-22 19-30 24-17 65-17 90 0 11 8 18 18 18 30 0 11-7 23-19 30z"/>
</svg>