Feeds

Virus writers in malicious code hide-and-seek

Bagle Zip shenanigans test new AV techniques

  • alert
  • submit to reddit

Intelligent flash storage arrays

A fresh angle of attack by virus writers is challenging new anti-virus techniques.

The latest versions of the Bagle worm spreading this week contain a malicious payload hidden in a password-protected zip archive. This is the first time the trick has been used to spread the virus in the wild, though the ruse has been seen in lab copies of viral code (e.g. Fearso), dating from last Summer.

The password-protected Zip archive technique enables virus writers to hide malware in files which gateway AV scanners normally can't open, so skipping one layer of protection commonly used by many large companies.

Conventional desktop AV scanners would still block infection at the point a user unzips password-protected viral files - assuming the correct signature update is available - but it's obviously desirable to stop malicious code reaching the user's PC in the first place.

AV firms including Kaspersky Labs and Bucharest-based BitDefender this week introduced upgrades to thwart the password-protected virus ploy.

Kaspersky Anti-Virus, for example, can now detect protected Zip archives, scan the email body for the password and then unpack and check the attachment for viruses. The new protection is been delivered alongside new AV signature downloads from the Russian vendor.

Gateway security appliance vendor Network Box has taken a similar approach. Other vendors can be expected to follow suit.

All of which will make IT systems as secure as they were against virus infestation before the new malware technique burrowed its way into public consciousness -i.e. not very secure at all. ®

Related Stories

Fistful of Bagles shoot up the Net
Bagle-B clobbers weary Net users
War of the worms turns into war of words
Blaster beats up British business

Top 5 reasons to deploy VMware with Tegile

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.