/usr/lib/arm-none-eabi/bin/as is in binutils-arm-none-eabi 2.28-5+9+b3.
This file is owned by root:root, with mode 0o755.
It is a symlink to /usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-as
/usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-as