According to Peter Simpson, manager of ThreatLab at anti-virus firm Clearswift, the Sobig.f worm now clogging email systems around the world is "the latest in a series of forays into the digital world by organised criminals looking to make a move online." Simpson, quoted by Will Sturgeon on Silicon.com, says, 'This is the sixth in a series of controlled experiments. This isn't about some kiddy writing viruses in his bedroom - this is really a very sophisticated example of organised crime.' And he believes there may be far worse to come. Simpson explained that the purpose of getting Sobig onto the computer is not to cause damage or purely to drive wide and rapid spread, but it is to gain control of machines, by downloading a Trojan [to] gain access to information such as bank details for the purpose of fraud...'"