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SAN JOSE, Calif. — Internet criminals have been getting more “professional” for years, trying to run their businesses like Big Business to have better and more profitable at selling stolen data online. Now the bad guys are exhibiting other unexpected traits: remarkable endurance and restriction in stalking their victims.

A new report by anti-virus software vendor Symantec particulars a startling tend that highlights the inventive ways criminals are figuring out ways to make money online.

Hackers are sometimes breaking into online businesses and not robbery anything. Gone are the days of plundering everything in sight once they’ve lay the foundation of a sliver of a security cavern.

Instead of swiping all the customer data they can get their hands on, a minute subset of hackers have concerned themselves with stealing and nothing else a very specific thing from the vendors they alienation.

They want access to the companies’ payment-processing systems and nothing otherwise, according to the “Symantec Report upon the body the Underground Economy,” slated for release today.

Card numbers verified

Those systems allow the bad guys to check whether credit-card numbers being hawked on underground chat rooms are solid, the similar passage the store verifies whether to take . a card payment or not.

It’s a love the crooks sell to other fraudsters who don’t ground of reliance that the stolen card numbers they’re buying from someone else will actually work.

The bad guys hardly touch anything. The customer data for that store’s clientele remains intact. They dress in’face to face install malicious software that turns the compromised machines into spam-spewing robots.

Think of it like taking a used car to a mechanic for an inspection in the presence of buying. Only in this action the artisan’session a squatter who’s holed up illegally in some other guy’session shop and using his tools when no one’s around at ignorance. And he cleans up spotlessly once he’s done.

According to Symantec, in the company’s yearlong look at 135 so-called “underground economy servers” — all common servers hosting mostly legitimate chat channels, with a few bad ones catering to cybercrooks — researchers determined that criminals receive latched on to this tactic as a way to make standard of value and self-police the underground.

Symantec said it didn’t find out which vendors had been compromised.

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