Investigators were still examining the contents of Jaschans confiscated computer Monday. "This will take quite a long time," criminal office spokesman Detlef Ehrike said. Officials are working to prepare hundreds of pages worth of data for a possible court case, he said.That led him to develop the Netsky virus furtherand after modifying it created Sasser. "Hes not stupidhes a really good programmer," Dyballa said. "But I dont know whether he was aware of the scale" of the damage. Sasser affects computers running Windows XP or 2000. Last Monday, the worm hit public hospitals in Hong Kong and one-third of Taiwans post office branches. Twenty British Airways flights were each delayed about 10 minutes Tuesday due to Sasser troubles at check-in desks, while British coast guard stations used pen and paper for charts normally generated by computer. Waffensen residents described Jaschan as shy and withdrawn, and said he hoped to study computing after finishing high school. "He only got involved when the talk turned to computers," said Christian Mueller, a chef at the Eichenhof restaurant. "Ive never heard him talk about anything else."
The teenager has told officials his original intention was to create a virus, "Netsky A," that would combat the "Mydoom" and "Bagle" viruses, removing them from infected computers.