According to reports from Reuters itself and IM management company IMlogic, a variant of the Kelvir worm, Kelvir-RE, had been using the Reuters IM service to distribute instant messages with a malicious payload.
IMlogic issued a statement Thursday reporting that the worm sends a simple message with the linked text ''Is it you?'' When users click the link, the worm sent messages via Reuters to all the infected user's contacts, and shut down some security services on the infected user's computer. The worm sends the messages via both IM and e-mail.
In a report published by Reuters' news service, Reuters spokesman Steve Naru said, ''In order to protect users and to prevent Reuters from being used to propagate this worm, Reuters has temporarily suspended Reuters Messaging services.''
Reuters had provided no timetable for the restoration of service.