You may have heard some of the recent reports about a suspected international cyber-espionage ring called GhostNet. Whether or not this is real or not is yet to be confirmed by the proper authorities, but there is mounting evidence to suggest that it is. If the reports are correct, it is a network of nearly 1,300 compromised PC's across over 100 countries. These may be personal, home computers, or business computers in a variety of company types.
Some of the reports strongly suggest that this cyber-espionage initiative has originated from China and is part of a larger cyber threat that China is developing as part of a military initiative. Others suggest it is cyber-terrorism. Whatever the case, if you are not concerned about something like this, you should be.
The reports suggest that this network of compromized computers has been growing since 2004, over 5 years! The infected PC's show no signs of threat and are used to gather information from various sensitive sources, whether those be business or government and are assembling that infomation for some unkown purpose. This could be sensationalized and it could be paranoia, but it certainly underscrores what IT professionals have been saying forever. Security threats are real and need to be protected against.
I remember a client, years ago in the late 90's, who got Internet access and insisted they did not need a firewall. Despite my protests and compelling information to back up my concerns, this client said no. Until one day, they got a visit from a law enforcement official who informed them that one fo their computers was being used to attack a high profile web site. My phone rang immediately after that visit and guess what, they implemented a firewall along with other defenses.
If GhostNet is real, it further confirms that proper network security is a must. The cost of the remediation, not to mention the horrible PR, of your business being compromised by something like this pales in comparison to insuring that your network is properly secured and protected.