OF97/Yosenio-A is a polymorphic Office macro virus that drops a mass-mailing worm and
The worm dropped by the macro virus is detected as W32/Yosenio-A. The worm also drops a polymorphic VBS worm detected as VBS/Yosenio-A.
OF97/Yosenio-A drops the mass-mailing worm to the Windows folder as MSIEXEC32.EXE.
OF97/Yosenio-A makes changes to Microsoft Office security settings in the system registry.