The Qakbot malware is making a comeback with a new campaign targeting enterprise players to disrupt operations and lock companies out of their own systems. On Tuesday, researchers from Cylance said that Qakbot, an information-stealing Trojan and backdoor malware that targets the Microsoft Windows operating system and 64-bit browsers with a particular slant towards business users, is back with a new campaign — and thanks to a re-write from the ground up, is even nastier than before.

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