When the virus is run, it infects the first uninfected EXE executable file by writing itself to the end of the binary. The infection size varies in different files.
On the day of activation it does not infect any file.
On the 7th day of any month it manifests itself with a video effect by flipping the text on the screen.
The virus contains the internal text string:
One of the ways the virus is propagated is via PUP programs. Although it may contain a healthy file, the others bundled with it may not.