/usr/lib/x86_64-linux-gnu/libAfterBase.so is in libafterimage-dev 2.2.11-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libAfterBase.so.0
/usr/lib/x86_64-linux-gnu/libAfterBase.so.0