The third of three former ransomware negotiators accused of assisting the ALPHV/BlackCat ransomware gang in extorting US businesses has pleaded guilty, months after his two co-workers did the same. Angelo Martino, 41, was a former ransomware negotiator at what is only referred to in court documents as Company-1 - Chicago-based incident response company DigitalMint. The Florida man pleaded guilty to his role in helping the once-dominant ransomware outfit extort five US companies, all of which were supposedly paying DigitalMint to deploy its experts to help minimize the damage caused by the cyberattacks. In reality, Martino was feeding confidential information about the victims to help ALPHV/BlackCat maximize their ransom payment. The court's list of allegations [PDF] claimed Martino financially benefited from passing on information including the victims' cyber insurance policy limits and details about how the negotiations were being perceived internally.…