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Not the much publicised Conficker, nor the Easter Twitter Worm were affecting Irish computers most, but a Trojan!
ESET's ThreatSense.Net® statistical system, which analyses the global trends of virus infections, reported that while on a global scale Conficker was the most prevalent recent infection, with it being detected on nearly one in ten computers (especially rampant in Russia and Ukraine where it was detected in almost one in three computers), in Ireland it is a Trojan, officially labelled WMA/TrojanDownloader.GetCodec that is doing most of the infecting. Latest figures show that in Ireland it featured in approximately 6.5% of all virus detections (while globally it ranked fifth on ESET's threat list with 1.45% of detections).
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This weekend has seen the popular social media site Twitter infected by several worms. Fortunately the technical team at Twitter were on the ball, were able to stop these attacks from progressing too far and have now plugged the vulnerabilities that these attacks exploited.
Both attacks used a technique known as “cross site scripting” (XSS). The perpetrators of the worms discovered that you could put Javascript code into the “Bio” section of a Twitter account. Anyone then visiting the home page of that account would activate the Javascript which would, in turn, infect the visitors account. Thus the worm was able to spread from one account to another.
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The Conficker.C worm became active on April 7th – a week after the expected date for activity. Trend Micro report that at that time it downloaded an update that has changed its behaviour somewhat.
The new variant, Conficker.E (sometimes known as WORM_DOWNAD.E), now has a stop date or May 3rd encoded into it. However the likelihood is that even if the worm itself stops functioning on May 3rd any backdoor that exists as a result of the worm will be left open.
The worm has also been contacting known Waledac worm domains and downloading files from these. Downloads from these servers frequently result in spamming attacks or rogue spyware and virus alerts. The latter may be the real intention of Conficker as it gives cyber-criminals an avenue to monetize the worm’s deployment. |
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