A new Android backdoor that's embedded deep into the device firmware can silently harvest data and remotely control its behavior, according to new findings from Kaspersky. The Russian cybersecurity vendor said it discovered the backdoor, dubbed Keenadu, in the firmware of devices associated with various brands, including Alldocube, with the compromise occurring during the firmware build phase. Keenadu has been detected in Alldocube iPlay 50 mini Pro firmware dating back to August 18, 2023. In all cases, the backdoor is embedded within tablet firmware, and the firmware files carry valid digital signatures. The names of the other vendors were not disclosed. "In several instances, the compromised firmware was delivered with an OTA update," security researcher Dmitry Kalinin said in an…