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  3. SymbOS.Beselo.B


Risk Level 1: Very Low

January 22, 2008
January 23, 2008 10:54:34 PM
Also Known As:
Symb/Beselo-B [Sophos]
Infection Length:
61,440 bytes
Systems Affected:
Symbian OS
SymbOS.Beselo.B is a worm that that runs on the Symbian OS, which is used as the operating system for Nokia Series 60 cellular telephones. The threat spreads through Bluetooth connections and MMS messages.

Antivirus Protection Dates

  • Initial Rapid Release version February 13, 2008 revision 035
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version January 22, 2008 revision 056
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date January 23, 2008
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
  • Target of Infection: Spreads through Bluetooth connections and MMS messages.
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.
Writeup By: Yana Liu

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