/usr/share/backintime/common/ is in backintime-common 1.1.12-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/backintime/common/applicationinstance.py
/usr/share/backintime/common/askpass.py
/usr/share/backintime/common/backintime.py
/usr/share/backintime/common/bcolors.py
/usr/share/backintime/common/cli.py
/usr/share/backintime/common/config.py
/usr/share/backintime/common/configfile.py
/usr/share/backintime/common/create-manpage-backintime-config.py
/usr/share/backintime/common/driveinfo.py
/usr/share/backintime/common/dummytools.py
/usr/share/backintime/common/encfstools.py
/usr/share/backintime/common/exceptions.py
/usr/share/backintime/common/guiapplicationinstance.py
/usr/share/backintime/common/logger.py
/usr/share/backintime/common/mount.py
/usr/share/backintime/common/password.py
/usr/share/backintime/common/password_ipc.py
/usr/share/backintime/common/pluginmanager.py
/usr/share/backintime/common/progress.py
/usr/share/backintime/common/snapshots.py
/usr/share/backintime/common/sshMaxArg.py
/usr/share/backintime/common/sshtools.py
/usr/share/backintime/common/tools.py