A malware infection believed to be linked to the Zeus crimeware family has been reported on systems in Europe.
Kaspersky Lab said that the attack, known as "Dorifel," displays a pattern of odd behaviour such as encrypting downloaded information and establishing secured network connections.
Researchers are not sure of the exact aim of the infection or its behaviours but Kaspersky Lab believes the attack is financial in nature and possibly related to Zeus.
Researchers studying the infection found that servers hosting the control components for Dorifel hosted a number of other malware attacks and also stored stolen financial information.
"We did find some interesting financial information, which could be an indication that this malware scam is related to for example ZeuS/Citadel, but since we have not yet identified any malware related to ZeuS/Citadel we cannot confirm it," said Kaspersky Lab researcher David Jacoby.
"All we can confirm is that the same server does store stolen financial information."
Since its discovery in 2010, Zeus has become one of the most infamous and effective malware infections on the web. The account-harvesting malware is able to locally inject HTML code into a system, adding phishing tools and other malicious code into pages from otherwise-trustworthy sites.
Kaspersky Lab said that thus far most of Dorifel's attacks have occurred in the Netherlands, though infections have been spotted throughout Europe.
News of the Dorifel attack comes just days after researchers uncovered another piece of malware known as Gauss.
That infection, which has largely been limited to systems in the Middle East, has been targeting financial institutions.
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