/usr/share/vim/vim73/tools/vimm is in vim-runtime 2:7.3.429-2ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/sh
# enable DEC locator input model on remote terminal
printf "\033[1;2'z\033[1;3'{\c"
vim "$@"
# disable DEC locator input model on remote terminal
printf "\033[2;4'{\033[0'z\c"
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