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zombies: The new big threat to Internet

thousands of PCs are made by hackers, who use them together to attack the Web.

hacker Logic is changing. The viruses that arrive via e-mail every time they have less presence and the center of the scene begin to occupy the botnet or zombie network. These networks are neither more nor less than home computers or remotely controlled enterprises, without their owners knowing it-by intruders.

In Argentina

attempts to hack into computers to become part of a botnet doubled in the last year. In 2009, one in every 150 people in the country were a threat botnet. And in 2010 this figure rose to one in every 65 people, according to the laboratory of computer security company ESET.

This new way of permanently installed in other PCs allows hackers to act in various ways, for the convenience of the day. "Before, the malware (viruses, trojans) were static. A particular Trojan was designed to steal passwords, for example. And it installed on a PC via e-mail record the keys and the attacker could steal. But now with botnet malware becomes dynamic. "First you take the machine, harmonized network of thousands of PCs, and then use it to see, '" explains Sebastian Bortnik, ESET.

"The botnet has become the most powerful Internet threat. And they are second to second more sophisticated, "agrees Maximiliano Cittadini, the specialist in the field of Trend Argentina.

With a zombie network an attacker can use all the machines made, and a second flood thousands of mailboxes with spam. You can also host in PCs, phishing sites (Pages to steal passwords trout) or pornography sites. You can also steal information and spread malware. The novelty is that the same network may shift to crime. In the past two years, the number of botnets doubled. And in 2011 is expected to reach 7,000.

To measure the problem is sufficient to recall that in March last year English Civil Guard and the FBI broke up in Madrid Butterfly network, a zombie network that was under control 13 million PCs, of which 180,000 were in the Argentina.

One of the keys to this kind of network is that it is very inexpensive to maintain. "The botnet are housed primarily Russian servers that charge for service between 80 and 200 dollars a month. In addition, a botnet of 2,000 PCs taken rents for $ 40 per day, "said Bortnik.

that the computer itself does not become a zombie you have to take precautions. "We must pay special attention to the files that arrive by mail and delete those messages from strangers with attachments," said Cittadini. "Download programs from sites unknown and using the operating system patches can make you become a victim. But beware that modern botnet also infected USB devices, "Dmitry Bestuzhev end of Kaspersky.