Just read that the Koobface worm that has plagued Facebook is back once again.

The popular social networking was hit by what’s believed to be the fourth rogue app in a week or so and was investigating the spread of a new variant of the Koobface worm, according to security firm Trend Micro.

This was the annoying worm virus that first appeared a few months ago. It is the one that abuses the trust you have in your friends. It sends you to a video you have to see, only to infect your computer with an executable file (.exe).

Since I’m on a Mac, even though I was suckered in like a lot of people, I wasn’t affected and knew something was not on the level when I saw the .exe file. This was originally reported a few days ago as being back again.

Another worm is one called Conficker which is suppose to be affecting the Southwest Airlines web site.

The worm is targeting about 7,750 domains, of which Wood said he found that nearly 3,900 are active. But they only resolve to 42 unique IP addresses, he said. Only a handful of those IP addresses are involved in a covert operation of ISPs and others trying to thwart Conficker by pre-registering domains, Wood wrote.

Now the funny thing is that this is one that isn’t suppose to kick in until March 13th. Even though it’s not suppose to kick in until that date, I saw a tweet moments ago about Southwest’s site being slow.

Mike Wood of SophosLabs Canada did some digging and found that the millions of computers infected with Conficker are programmed to contact wnsux.com, which redirects visitors to the main Southwest.com site, on March 13 to get instructions.

The above tweet made the decision for me to go ahead and make sure the word was on the street about this Southwest Airlines worm virus. Lucky for her, it was just a fail of the web site’s rapid reward’s system! No worm today, but a warning to all to be vigilant in the very near future!