/usr/lib/python2.7/dist-packages/asn2wrs.py is in wireshark-dev 1.12.1+g01b65bf-4+deb8u14.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/asn2wrs.py