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Washington - Cybercriminals are settling into a comfortable place in the "Dark Web" where they test, refine and distribute malware for online thievery.
That's the conclusion of researchers at McAfee, the US Internet security specialist, who noted that a huge data breach that affected as many as 110 million customers of the US retailer Target may be just the tip of the iceberg.
In its quarterly threat assessment released Monday, McAfee Labs noted the relative ease with which this type of malware is bought and sold in "Dark Web" marketplaces.
McAfee researchers concluded that the malware for the Target attacks used "relatively unsophisticated technologies likely purchased 'off the shelf' from the Cybercrime-as-a-Service community, and customized specifically for these attacks," the security firm said.
The report pointed out that the attackers who stole the data have also found a market - offering some of the 40 million credit card numbers reported stolen in batches of between 1 million and 4 million at a time.
"The fourth quarter of 2013 will be remembered as the period when cybercrime became 'real' for more people than ever before," said Vincent Weafer, senior vice-president for McAfee Labs.
"These cyber thefts occurred at a time when most people were focused on their holiday shopping and when the industry wanted people to feel secure and confident in their purchases. The impact of these attacks will be felt both at the kitchen table as well as the boardroom table."
Weafer added that the attacks "represent a coming of age for both Cybercrime-as-a-Service and the 'Dark Web' overall."
The "Dark Web" actors appear to be operating with ease, like other kinds of online businesses, McAfee said.
"We must recognize that this class of attack is far from 'advanced,'" it added.
"The BlackPOS malware family is an 'off-the-shelf' exploit kit for sale that can easily be modified and redistributed with little programming skill or knowledge of malware functionality."
The thieves who employ the malware can easily turn to a popular credit card black market like Lampeduza Republic, which McAfee said had a "well-organized hierarchy" which allows for a "disciplined and functional marketplace."
"Thieves can pay for the stolen credit cards using one of the many anonymous virtual currency mechanisms, such as Bitcoin," McAfee said.
"We believe these breaches will have long-lasting repercussions. We expect to see changes to security approaches and compliance mandates and, of course, lawsuits.
"But the big lesson is that we face a healthy and growing cybercrime industry which played a key role in enabling and monetizing the results of these attacks."
McAfee's report also noted a surge in mobile malware as more people use smartphones. It collected 2.47 million new mobile malware samples in 2013, with 744 000 in the fourth quarter alone.
