A China-based e-commerce scam appears to be harvesting payment information not through direct hacks on companies or using pernicious malware to skim data, but with a simpler approach.

It's not clear if the scammers actually hacked anything of value. But skimming cryptocurrency from the public seemed to be the goal.

It's the latest milestone in a case that spans at least four countries. French and U.S. prosecutors allege the Russian helped create the infamous Locky ransomware and then launder the resulting bitcoin ransom payments.

The agency's Cyber Investigations Advisory Board is ramping up, and Secret Service personnel are working more closely with U.S. Cyber Command than ever, officials said.

The feds say Adam Rogas, the co-founder of software-as-a-service company NS8, alleged tricked investors with falsified financial statements.

The charges come amid a flurry of Justice Department activity.