Three months after U.S. officials asserted that Russian intelligence used popular antivirus company Kaspersky to steal U.S. classified information, there are indications that the alleged espionage is related to a public campaign of highly damaging NSA leaks by a mysterious group called the Shadow Brokers.

“That’s a Russian intelligence operation,” a former senior intelligence official, who requested anonymity to speak bluntly, told Yahoo Finance. “They’ve gotten a lot noisier than they used to be.”