<A target="_blank" href="http://www.cio.com/article/655511/As_PC_Virus_Turns_25_New_Worry_Emerges_Attack_Toolkits?taxonomyId=3089">The first computer virus, targeting DOS-based systems, was launched 25 years ago</A> by the Alvi brothers of Lahore, Pakistan. Today malware can be built from a "kit" and even a beginner can launch a dangerous attack.