Anti-virus vendors report an increased chatter of virus activity on Microsoft Corp.’s Microsoft Network messenger Sunday night through Monday.

In what appears to be a concentrated attack on users of the MSN instant messaging client, security experts warn that several new worms with unique replication techniques have been launched alongside mutants of the known Bropia virus family.

“We are regularly adding detection for new Bropia worm variants,” F-Secure virus analyst Alexey Podrezov said in a notice.

In addition, he said two new MSN worms—identified as Kelvir and Sumom—have also joined the fray.

Source: eWeek

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