Cybercriminals are demanding payments of between $300,000 and $5 million apiece from as many as 10 companies breached in a campaign that targeted Snowflake Inc. customers, according to a security firm helping with the investigation.The hacking scheme has entered a “new stage” as the gang looks to profit from the most valuable information it has stolen, said Austin Larsen, a senior threat analyst at Google’s Mandiant security business, which helped lead Snowflake’s inquiry. That includes auctioni...