W97M/Panther is a Word 97 macro virus.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
W97M/Panther.A infects the global template when an infected document is opened. Then it disables the built-in macro virus protection.
After the global template has been infected, the virus infects all documents that are opened.
The virus does not do anything besides replication.
This variant is functionally identical with W97M/Panther.A
This variant is functionally identical with W97M/Panther.I
Technical Details: Katrin Tocheva and Sami Rautiainen, F-Secure