/usr/share/java/jsch.agentproxy.usocket-jna.jar is in libjsch-agent-proxy-java 0.0.8-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/jsch.agentproxy.usocket-jna-0.0.8.jar
/usr/share/java/jsch.agentproxy.usocket-jna-0.0.8.jar