The companies include: Yahoo, Symantec, Northrop Grumman, and Dow Chemical, and others.
Most have denied to comment.
Apparently the companies in question where using Internet Explorer 6-8, Adobe Reader, and some sites OpenX advertising.
A trojan was executed via a hole in reader, or openx to IE6-8.
Or via emails.
The target was trade secrets.
So update your internet explorer (or download firefox!), update reader (or use a different PDF reader).
OpenX was used in the Adobe attack.
Note: The OpenX attack was a security hole, it can not directly infect your computer, rather they put up malicious ads.
Those ads have since been removed.
So is China to blame for this, or is it just a coincidence.

I’m a bit behind. I just read this in Mashable _ http://mashable.com/2010/01/18/attack-google-inside-job/ Inside job or not?
.-= timethief´s last blog ..How to Change Font (Text) Size in Your Browser =-.
Hmm. There is always claims that (insert random event) was a inside job.