On systems that are infected by Win32/Mywife@E.mm, BlackWorm, W32.Blackmal.E@mm, WORM_GREW.A, W32/Nyxem-D, Email-Worm.Win32.VB.bi, the malware is intended to permanently corrupt a number of common document format files on the third day of every month. February 3, 2006 is the first time this malware is expected to permanently corrupt the content of specific document format files. The
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