A North Korean cybercrime group known for its espionage operations attempted to deploy ransomware against U.S. targets to extort money, only a month after law enforcement cracked down on its illicit activities, according to a U.S. cybersecurity company.

Symantec reported on Wednesday that it found evidence in August that the threat group Andariel, which the security firm tracks under the name “Stonefly,” infiltrated three private U.S. companies to deploy ransomware to their internal networks.

The report stated that the attackers were unsuccessful in deploying ransomware, but assessed the attacks to be financially