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Malware

Versatile and infectious: Win64/Expiro is a cross‑platform file infector

Recently, our anti-virus laboratory discovered an interesting new modification of a file virus known as Expiro which targets 64-bit files for infection. File-infecting viruses are well known and have been studied comprehensively over the years, but malicious code of this type almost invariably aimed to modify 32-bit files. One such family of file viruses, called

The Home Campaign: overstaying its welcome

The Home Campaign is a malware campaign that uses a modified variant of Darkleech to direct visitors to the Blackhole exploit kit. We want to give a better idea of the size and extent of this campaign.

Operation Hangover: more links to the Oslo Freedom Forum incident

In our previous post on Operation Hangover, we revealed the existence of an attack group, apparently operating from within India, who were mainly targeting systems in Pakistan. In this post, we will analyze the Mac OS X samples that have been linked to this group and will provide new evidence that the Mac and Windows spywares are related.

Tax returns: Slovakian spyware campaign

ESET’s Security Research Lab details a malware-spreading campaign leveraging the deadline for tax returns in Slovakia and examines a case of infection where a bank’s two-factor authentication prevented financial loss.

Computer viruses “are making a comeback”, says Microsoft

Computer viruses are making a comeback, according to Microsoft’s Director of Trustworthy Computing – with numbers rising globally in 2012. Tim Rains says that for several years, viruses have been “out of favour with attackers”, but points to statistics showing that they have made a comeback in 2012, at least in certain territories.