MSN Messenger hit by double-whammy worm

[genesis]

MSN Messenger hit by double-whammy worm

Trend Micro is warning of a new variant of the Bropia worm that uses MSN Messenger to spread.

The Bropia.F worm is packaged with a second, more damaging worm that tries to exploit poorly patched computers, the antivirus company said on Thursday.

The latest variant of the Bropia worm was discovered on Wednesday evening, Trend Micro said. It infects systems belonging to users of MSN Messenger by sending itself as a picture of a roast chicken with tan lines to all available or online contacts. It also releases a second more dangerous worm, called Agabot.ajc, on the infected computer.

Adam Biviano, a senior systems engineer at Trend Micro, said that although there have only been a handful of reported infections, the company has declared the worm a medium risk, because of its potential to spread and steal users' bandwidth.

"The potential for damage is quite high, because it drops another worm on your machine that is quite nasty and can spread through network by taking advantage of unpatched desktops and servers," Biviano said.

Biviano said this variant of Bropia can easily be avoided, because it exploits vulnerabilities that could have been patched months ago and relies on people opening a file through MSN Messenger. He advises people to only open files received through the instant messaging program if they are expected--even if they are from a contact. It is very possible that the file is being sent unbeknown to that person, he said.

"Usually, if you are sending a file using (an instant messaging program), you say 'I'm sending you this picture, have a look at it.' It is never random or out of the blue," Biviano said.

The worm affects MSN Messenger on computers running Windows 95, 98, ME, NT, 2000 and XP, according to Trend Micro's advisory. The company is advising MSN Messenger users to avoid accepting file transfers coming from an untrusted source.

Biviano said the second worm--Agabot.ajc--does have the potential to perform a distributed denial-of-service attack on certain services. For example it preys on the same vulnerabilities that were exploited by Slammer, Blaster (MSBlast) and Sasser.

Biviano said this variant of Bropia is the first worm to use instant messaging that has been given a higher-level alert status. It probably won't be the last, he said.

"Obviously, the popularity of IM itself is starting to gain the attention of the virus writers, and they are now using it as a tool," he said.

Source: CNet

[regix]

This is bad. But i'm not too worried because I have my firewall blocking all files coming in from messengers.

Still very easy solution is to not accept files from people, specially if it's coming in without a message first.

[genesis]

Of course, common sense is if a person on your contact list sends a file all of a sudden without a message first, you'd ask him what the file is before taking it.

Getting hit by this worm doesn't worry me all too much as much as the news bit in the first post that suggests there will be a rise in viruses via messengers.

[aamir]

Thanks for sharing

[genesis]

You're welcome aamir. Hope this will help many others get aware of the vulnerability.

[SilentWarrior]

First THX for sharing the info, then, how can he clean them out of our pcs if we get infected?, the anti-virus software companies have developed an update to fix that issue ?

[genesis]

No word on the fix yet, I'm awaiting some news on that too. Will post it here as soon as I get it.

For now just don't accept files that look wierd.

[CoolJsa14]

That really sucks, but i normally most of the time use AIM. Personally I think it is much better and more organized messenger.

[racing_warrior]

that is pretty bad, gen thanks again eh ... dam idiots launching these viruses

HEY EVERYONE

[genesis]

Hey man, you made it here!