The recent CCleaner malware outbreak is much worse than it initially appeared, according to newly unearthed evidence. That evidence shows that the CCleaner malware infected at least 20 computers from a carefully selected list of high-profile technology companies with a mysterious payload. (credit: Talos) Previously, researchers found no evidence that any of the computers infected by the booby-trapped version of the widely used CCleaner utility had received a second-stage payload the backdoor was capable of delivering.