參見
http://securityresponse.symantec.com/avcenter/venc/data/w32.welchia.worm.removal.tool.html
http://securityresponse.symantec.com/avcenter/venc/data/w32.blaster.f.worm.html
http://securityresponse.symantec.com/avcenter/venc/data/w32.blaster.worm.html
http://securityresponse.symantec.com/avcenter/venc/data/w32.blaster.e.worm.html