That gang may have bitten off more than they can chew. They've now gotten the US government involved officially, which means that beyond the sheer mass of resources that will go into tracking this gang, the government also has something to prove now. Being at the center of an international incident is probably not good for business.
I'm not super-knowledgable about cybersecurity, but shouldn't simply using TOR make it nearly impossible for the US government to track them down? If they want to go overkill, they can additionally use a public VPN account purchased using walmart giftcards bought on ebay using a stolen identity and then mailed overseas. They can also perform the hack using a brand new computer that they never use again afterward. It…
One can suspect a healthy percentage of Tor nodes are operated by Governments as TOR was developed and released by the US Navy[2].
[1] https://www.theregister.com/2015/05/30/researchers_claim_tra...