Feeds

Spammers adopt stealth tactics

Slow burn

Choosing a cloud hosting partner with confidence

Botnet controllers are switching to stealth tactics in a bid to avoid detection. Instead of mass mail-outs of spam and malicious code, they are adopting slower distribution tactics in a bid to avoid appearing on corporate security radars.

UK-based web security firm BlackSpider Technologies reports that one huge botnet, responsible for issuing 50m identical spam emails per day, compromises at least 150,000 distinct IP addresses. The use of a large number of machines - each sending out an average of 330 emails a day or around 40 per hour during the course of a working day - is a change from days of yore when a handful of compromised email servers would have been used to do the same job.

It's well known that packages such as Send-safe.com are used by spammers to control the distribution of junk mail broadband-connected PCs infected by viruses such as SoBig, but BlackSpider's figures on the mail-out rate from compromised machines add a fresh perspective to the problem.

BlackSpider Technologies CTO James Kay said this low mail-out rate means users of compromised machines will not notice anything untoward with their net connection. Because they don't notice anything amiss, the spambot remains undetected. "It’s about time law enforcement agencies took the botnet issue far more seriously. Ninety-eight per cent of spam and malicious code comes from machines with bad or unknown reputations, and we should be slapping online ASBOs (anti-social behaviour orders) on them to stop this criminal cycle," Kay said.

Kay added that spam purveyors are adopting the same stealth tactics as VXers. "It’s not dissimilar to the low-volume virus distribution tactic that we first saw last year, when hackers realised that releasing viruses in smaller numbers kept them out of sight of anti-virus vendors for far longer, causing more damage." ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
Regin: The super-spyware the security industry has been silent about
NSA fingered as likely source of complex malware family
Why did it take antivirus giants YEARS to drill into super-scary Regin? Symantec responds...
FYI this isn't just going to target Windows, Linux and OS X fans
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
'Regin': The 'New Stuxnet' spook-grade SOFTWARE WEAPON described
'A degree of technical competence rarely seen'
Astro-boffins start opening universe simulation data
Got a supercomputer? Want to simulate a universe? Here you go
prev story

Whitepapers

Driving business with continuous operational intelligence
Introducing an innovative approach offered by ExtraHop for producing continuous operational intelligence.
Why CIOs should rethink endpoint data protection in the age of mobility
Assessing trends in data protection, specifically with respect to mobile devices, BYOD, and remote employees.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Protecting against web application threats using SSL
SSL encryption can protect server‐to‐server communications, client devices, cloud resources, and other endpoints in order to help prevent the risk of data loss and losing customer trust.