Feeds

SirCam worm enjoys virus gang bang

Double the fun, double the infection

  • alert
  • submit to reddit

Combat fraud and increase customer satisfaction

Some copies of email attachments infected with the prolific SirCam worm also carry copies of other viruses, security experts have warned.

MessageLabs, a managed services firm that scans its users email for viruses, said it has intercepted more than 100 emails doubly infected emails which have the potential to trip up the disinfection process of antiviral scanners.

Incomplete or botched cleaning could, at least in theory, create modified versions of the SirCam virus that are hard to detect, it warned. This is noteworthy because the bandwidth-hogging, privacy-threatening SirCam worm is on its way to becoming the most common virus ever.

MessageLabs has reported intercepting more than 100 doubly infected files, such as Sircam infected with FunLove, which infects applications in the Windows and Program Files folders; or SirCam infected with Kriz, a polymorphic Windows executable virus.

Graham Cluley, senior technology consultant at antivirus vendor Sophos, said the possibility of a "cocktail" of different infections affecting the same executable has been known about for some time and does carry with it a small risk.

"Normally an antivirus scanner will be able to strip off different layers of viruses. But when viruses mate together in a single file they can corrupt themselves," said Cluley.

This is rare but if it happens vendors would need to update their antivirus signatures to detect the hybrid infection or, if appropriate, fix a bug in their own software.

Double infections occur because users have got themselves infected with two viruses, the PC equivalent of contracting both herpes and syphilis. Users can most effectively protect themselves against viruses by practising "safe computing" - that is by regularly updating their antiviral protection and by deleting emails containing suspicious attachments. ®

External Links

Write up on SirCam by Symantec
MessageLabs reports on SirCam

Related Stories

SirCam virus hogs connections with spam
Rise in viruses within emails outpacing growth of email
Symantec fails to stop SirCam
Hotmail fails to block SirCam worm
Magistr continues three month reign as top virus
Users haven't learned any lessons from the Love Bug
Microsoft security fixes infected with FunLove virus

Combat fraud and increase customer satisfaction

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.