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  3. MSIL.Letum.A@mm


Risk Level 2: Low

April 8, 2006
April 8, 2006 4:30:21 PM
Also Known As:
WORM_LETUM.A [Trend], MSIL/Letum.a@MM [McAfee], W32/Letum-A [Sophos]
Systems Affected:
Windows 2000, Windows NT, Windows XP
MSIL.Letum.A@mm is a mass-mailing worm that also spreads through Usenet servers.

Antivirus Protection Dates

  • Initial Rapid Release version April 9, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 9, 2006
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date April 12, 2006
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.

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