The ongoing DDoS attacks that have been targeting a series of U.S. government sites as well as some commercial sites are being executed by an old piece of malware that is designed to ruin files on infected PCs rather than steal data. The attacks, which appear to have started late last week, have targeted several government sites, including FTC.gov and others. There has been widespread speculation that the attacks are the work of a foreign government, but experts say that the somewhat amateurish nature of the campaign makes that unlikely.
Source: https://threatpost.com/mydoom-ddos-attacks-likely-work-unsophisticated-attackers-070909/72907/