W97M/Onex is a simple Word macro virus.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
W97M/Onex.A is a simple Word macro virus, that infects the global template when an infected document is opened. After that all opened documents become infected. Beside replication the virus disables the macro virus protection.
W97M/Onex.E contains a payload that activates based on a random number. In a chance of 1:150 the virus attempts to delete "c:\winnt\system32\ntoskrnl.exe" when an infected document is opened or a document is opened in an infected system. Otherwise it functions like the original W97M/Onex.A.
Technical Details: Sami Rautiainen, F-Secure; August 2001