The decade-old Qbot financial malware has resurfaced with an improved version in a new attack against businesses that has infected thousands of systems so far. Researchers from data security solutions provider Varonis have uncovered the attack after a customer alerted them about suspicious activity on a computer. The culprit turned out to be an infection with a new strain of Qbot, also known as Qakbot, that was trying to spread to other systems on the network.

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