We have relaunched: What's new at ZDNet Asia?

ZDNet / News / Security / Story

New virus communicates by pictures

By Robert Lemos, CNET News.com on June 14, 2002

Summary

Antivirus companies warn of a virus that harms media files--but it could be more of a computer-science curiosity than a threat, experts say.

Events

Microsoft MSDN/Developer Event
25 Mar 2010

One Marina Boulevard, Microsoft Singapore

IT Architect Regional Conference Singapore 2010
20 - 21 Apr 2010

Singapore Management University, Singapore

The Internet Show 2010
21-22 Apr 2010

Suntec Singapore

Antivirus companies warned on Thursday of a new virus that communicates through digital images, but security experts aren't sure how much of a threat this latest evolutionary branch of malicious code poses.

Dubbed the first "JPEG infector" by security company Network Associates, the W32/Perrun virus has two parts: infected JPEG images that contain the virus's payload and a viral program that extracts the code from the images and infects other JPEGs on the system as they are opened.

Because PCs have to be infected by the extractor virus before any code hidden in image files can affect them, the program is more a computer-science curiosity than a threat, said Vincent Gullotto, vice president of Network Associates' antivirus emergency response team.

"We are not saying that this is a problem," Gullotto said. "We gave it a low risk, but we haven't seen anything like this before." A digital image carrying code for W32/Perrun is easy to spot, he said, because the image is corrupted by the new code.

PC users should note that they can't be infected by opening a JPEG image. Rather, a virus on an infected computer copies code into a digital image and waits for the JPEG to get passed along to other infected systems. The virus on those systems will read the code fragment in the JPEG image and follow the instructions. Users who haven't been infected by the extractor virus can open an infected digital image and nothing will happen.

The extractor file only infects computers running Microsoft Windows and doesn't include a mass-mailing component. And, in fact, the virus has not been released on the Internet, but has been sent only to major antivirus companies by the creator of the code.

However, the code has opened up a debate among antivirus researchers as to whether viruses with multiple parts could represent a new threat to PC users.

With some rather simple improvements, the virus could pose a threat, Gullotto said.

One obvious modification, which has already been discussed among the virus community, is using steganography--a technique to hide data in pictures--to allow such programs to embed code in images without corrupting the picture.

An upgradable virus is not a new event in the virus world. Hybris, a worm that slowly infected a large number of computers on the Internet last year, could be upgraded with encrypted plug-ins that were posted to Usenet, security experts have said.

Researchers have long worried about the evolving technology in viruses, and the latest critter to climb out of the Internet shows that the arms race with virus writers hasn't slowed.

But for Gullotto, the real lesson is one of foresight.

"People should start becoming more leery of JPEG files," he said. "If there is a chance that we can get ahead of the virus curve in educating the users, we should."

Talkback

Add your opinion

In order to post a comment, you need to be registered. (Sign In or register below)

Post your comment
Transform your business interactions with real-time voice, video and telepresence solutions.
Tech Vendor: Cisco

ZDNet Asia Live

www.3w.com.au has seen it's outsourced IT Contracting Business in Manila grow at 4 times the rate of its traditional Australian Based...

2 hours 30 minutes ago by brucemills on Companies' outsourcing spend to increase

RT @3wconsulting: Whitepaper from http://3W.com.au "Outsourcing Your IT Requirements to Philippines" now on @zdnetaustralia & @zdnetasia http://ow.ly/1oY9f

Whitepaper from http://3W.com.au "Outsourcing Your IT Requirements to Philippines" now on @zdnetaustralia & @zdnetasia http://ow.ly/1oYbA

Whitepaper from http://3W.com.au "Outsourcing Your IT Requirements to Philippines" now on @zdnetaustralia & @zdnetasia http://ow.ly/1oYbz

Zdnetasia.com Estimated Worth $178,365 USD. Daily Ad Revenue:$244 USD, Daily Views:81,445 Pages... - http://www.haplog.com/www.zdneta...

recently estimated website net worth of zdnetasia.com - http://www.haplog.com/www.zdneta...

12 hours 22 minutes ago by haplog on topsy

When I create an event, I click on an approximate time during the day when I want the event to occur, then I click "edit event detail...

1 day 58 minutes ago by bessellbrowne on Google Calendar gets 'smart' rescheduling

ipads break alott i had one it broke three times in the month i had it so i got rid of the damn thing id just go for the laptop Top Grade...

1 day 97240 seconds ago by bessellbrowne on Report: 'Hundreds of thousands' of iPad preorders

There are a number of websites that still require Internet Explorer to view and IE for Mac Stinks (it is really ies4osx which is the Wind...

1 day 2 minutes ago by bessellbrowne on Microsoft: Only minor tweaks in Windows 7 SP1

The receivers don't transmit back to the satellite. Unless there is a phone line attached to the receiver, they don't have any wa...

1 day 5 minutes ago by bessellbrowne on Apple to join the geolocation craze?

What to expect from open source Symbian http://is.gd/aPIGL

1 day 20 minutes ago by rebelk0de on topsy

"Lead Cognos BI Developer Insurance - Jobs - ZDNet Asia" http://bit.ly/bRcxOG

1 day 59 minutes ago by rhrcognos on topsy

whatever little understanding I have we 'll only progress toward end of the world if we use HPCs to lenthen life of human being. Huma...

1 day 11 minutes ago by abhi32002@gmail.com on High computing promises elixir of life

Thanks for the knowledgeable article on SDDs. Allas...when all this reasearch will happen in Indian Universities. Hope the new bill on Fo...

1 day 24 minutes ago by abhi32002@gmail.com on APAC HPC users eye solid-state drives

It was a good article. This brings a good opportunity for Indian IT firms to come up with new solutions in this field. HPC can become a b...

1 day 43 minutes ago by abhi32002@gmail.com on High computing most-wanted job in Asia

COL KR DHARMADHIKARY(RETD) its very late to reply the link, but if it is still alive and looking for opportunity, i would like to know th...

1 day 40 minutes ago by deb021280 on Education takes off in rural India, helped by PCs

It was just a matter of time until google was marginalised anyway. I'm afraid this will be forgotten in China very quickly. Still, it...

1 day 45 minutes ago by robinsmith on Report: Google to leave China on April 10

High performance computing (HPC) most-wanted job in Asia http://bit.ly/9vFC3i (via @zdnetasia) #singapore

He doesn't care if her shoes are of glass, All he wants to see is a huge rack and nice a*s. Sleeping beauty's not awoken by true ...

1 day 14 minutes ago by warlowdavies on One pair of 3D glasses to rule them all

RT @zdnetasia: EMC COO, Pat Gelsinger, on bridging gaps in the organization and its cloud ambitions in Asia. (cont) http://tl.gd/i5jjd

EMC COO, Pat Gelsinger, on bridging gaps in the organization and its cloud ambitions in Asia. http://bit.ly/9etOZW

Asian SMBs need to pay more attention to disaster recovery planning http://bit.ly/bDet08 via @zdnetasia

Asian SMBs need to pay more attention to disaster recovery planning http://bit.ly/bDet08

[TECH] URL Shorteners slow Web redirection. - http://bit.ly/bySnWK @zdnetasia

URL shorteners are great but they can slow web redirection & you pray it would never go down http://bit.ly/bySnWK via @zdnetasia

Temasek Holdings eyeing tech stocks, indicating optimistic outlook on IT sector. http://bit.ly/aM7VwU

URL shorteners slow Web redirection. http://bit.ly/bySnWK

Chinese agencies cry foul over Google. http://bit.ly/by6rwV

all of sg's isps have been practising compulsory invisible proxy for all home subscribers at their backend since many years back alre...

3 days 24 minutes ago by melvinchia on Web filters mean bad news for business

it is not to good for china.
Proactol

3 days 8 minutes ago by nathonastle on Chinese ad partners beg Google for information

IT security insiders rob casinos of $50K http://is.gd/aPIKR

3 days 40 minutes ago by rebelk0de on topsy

Very good explanation of JMX

4 days 14 minutes ago by Babith B on Managing applications with JMX

The reaction to a report issued Tuesday by Flurry Analytics managed to completely overlook some interesting news--the Android-based Motorola Droid outsold the original iPhone over the same period of time following their respective launches--to focus instead on the sales numbers for the Nexus One.

4 days 17 minutes ago by lonemavericks on diggs

Another ZTE story....

4 days 19 minutes ago by Moderate Your Greed on Philippines opens bid for final 3G license

Keep up with ZDNet Asia

Linkedin Join our network

RSS Feeds Subscribe now

Newsletters Subscribe today

Twitter Follow us

Inside ZDNet Asia

Special Report: Tech Focus in 2010

Latest Videos on Tech Industry

Insight: Interviews with Newsmakers

Search for over 15,000 Tech Jobs in Asia

Find your Tech answers in TechGuides

IT Library: Over 60,000 IT papers at your fingertips

Download IT Priorities 2010 Report