August 2003 ended up being the hopeless month for corporate and homegrown PC administrators all over the planet as the 6th and generally horrendous freak of Sobig series hit the web.
Sobig F tainted have PCs by tricking the clients that the bad email they got is from a genuine source. On the off chance that the client opens the connection it uncovered a security opening in the framework permitting the gatecrasher to send messages through the caught client's email address. In no less than 24 hours, Sobig F set a standard of recreating more than 1,000,000 duplicates of itself which later was broken by one more mass mailer worm - My Destruction. Nonetheless, Sobig F caused a broad harm of $3 billion - $4 billion leaving contaminations in north of 2 million laptops around the world.