Hundreds of Lithuanian government and corporate Web sites were hacked and plastered with Soviet-era symbols and other digital graffiti this week in what appears to be a coordinated cyber attack launched by Russian hacker groups. A New York Times story reports that Lithuanian officials did not directly accuse Russian hackers of initiating the attacks, but said they had come from foreign computers. However, iDefense, a security intelligence firm, based in Reston, Va., attributed the attacks to nationalistic Russian hacker groups protesting a new Lithuanian law banning the display of Soviet emblems, including honors won during World War II. According to Lithuanian media reports, the attacks shut down the Web sites of the national ethics body, the securities and exchange commission, the Lithuanian Social Democratic Party, among others. iDefense said hacker groups used Internet forums and blasted spam e-mails to spotlight a manifesto called “Hackers United Against External Threats to Russia,”