/usr/lib/pyshared/python2.7/M2Crypto/__m2crypto.so is in python-m2crypto 0.21.1-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pyshared/python2.7/M2Crypto/../../../python2.7/dist-packages/M2Crypto/__m2crypto.so