"Criminal gangs are planting “sleepers” in cleaning companies so that they can physically access IT infrastructure, a senior police officer with responsibility for cyber crime has warned, urging businesses to bolster their physical security processes in the face of the growing threat. Shelton Newsham, who manages the Yorkshire and Humber Regional Cyber Crime Team, told an audience at the SINET security event that he was seeing a 'much larger increase in physical breaches' as cyber crime groups diversify how they attack and move laterally inside institutions..." https://www.cbronline.com/cybersecurity/threats/cyber-criminals-cleaners/