MSIL.Letum.A@mm is a worm written in Microsoft .NET’s Microsoft Intermediate Language (MSIL) that can affect both Windows PC and Windows Mobile powered devices that have the .NET framework installed. The worm arrives as an attachment to a spoofed email that pretends to come from Symantec and also spreads through Usenet servers.

Affected systems:
- Windows 95
- Windows 98
- Windows 2000
- Windows NT
- Windows XP

Risk: Low

More Information: VirusAlert.info

Source: VirusAlert.info