/usr/ is in php-horde-crypt-blowfish 1.1.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/php/
/usr/share/php/Horde/
/usr/share/php/Horde/Crypt/
/usr/share/php/Horde/Crypt/Blowfish/
/usr/share/php/Horde/Crypt/Blowfish/Php/
/usr/share/php/Horde/Crypt/Blowfish/Php/Ecb.php
/usr/share/php/Horde/Crypt/Blowfish/Php/Base.php
/usr/share/php/Horde/Crypt/Blowfish/Php/Cbc.php
/usr/share/php/Horde/Crypt/Blowfish/Exception.php
/usr/share/php/Horde/Crypt/Blowfish/Base.php
/usr/share/php/Horde/Crypt/Blowfish/Pbkdf2.php
/usr/share/php/Horde/Crypt/Blowfish/Openssl.php
/usr/share/php/Horde/Crypt/Blowfish/Php.php
/usr/share/php/Horde/Crypt/Blowfish/Mcrypt.php
/usr/share/php/Horde/Crypt/Blowfish.php
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_crypt_blowfish.reg
/usr/share/doc/
/usr/share/doc/php-horde-crypt-blowfish/
/usr/share/doc/php-horde-crypt-blowfish/copyright
/usr/share/doc/php-horde-crypt-blowfish/changelog.Debian.gz
/usr/share/doc/php-horde-crypt-blowfish/package.xml.gz