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"The bad news about this infection, which lasted several hours, is that just two of 43 IT security applications can detect this malware variant, according to Virus Total," said Mickey Boodaei, chief executive at Trusteer.
"The TechCrunch fiasco is all part of the rising problem of Zeus infections," he said.
According to Boodaei, the number of users who are infected with Zeus has increased over the past month due to aggressive distribution attempts made by fraudsters.
"The two leading infection routes are compromised websites that serve up a Zeus infection to visitors and spammed e-mails that include Zeus as an attachment or link," he said.
At the same time that the quantity and quality of these attacks have increased, the detection rate of anti-virus products is decreasing, said Boodaei.
"We estimate that fraud losses due to Zeus specifically are going to triple in 2011 due to the increase in distribution and lack of coverage by antivirus suppliers. This latest infection of the TechCrunch Web portal is just the tip of the iceberg," he said.