• Sasser is a computer worm.  
• Sasser was first noticed and started spreading on April 12,2014. 
• In Europe: 
• The worm hit thousands of homes and businesses in Finland.The Sampo bank in Finland shut down all 130 branches for a few hours one day after being hit by the worm but were reopened by the afternoon .

         In Asia:

• Taiwan's state-run postal serviced found 1,600 workstations infected with the worm and 430 offices had to resort to "manual service" to get work done.
• In America:
• Credit car giant American express also had problems with the worm 6,000 of 17,000 computers of the university of Texas M.D.   

                              It is estimated that this worm had damaged a million of computers

• Sasser and its variations are network-aware worms that do not require e-mail or user interaction to spread. The worms use a bootstrap effect by infecting new machines first, then downloading the full code from a previously infected machine. Sasser (w32.sasser.a) and Sasser.b (w32.sasser.b) are both 15,872 bytes long, and they randomly scan local networks and the Internet to look for additional systems to infect. This scanning could slow normal traffic on the Internet.    
• Go to Start> Run > type shutdown -a (respect the spaces) and click "OK "
•  Photo of Sasser: