Comment: Investigating? Judging by their comments it seems they've come to a definite conclusion. And it's very unlikely that Russia would 'retaliate' due to sanctions imposed by the West, since these so-called sanctions have shown themselves to be ineffective and have done nothing but to ultimately force Russia to align itself with BRICS countries and other countries that aren't directly controlled by the West.
Russian sanctions? You Must be Joking! Russia Holds All the Cards!
The attack, which occurred in mid-August, resulted in the loss of gigabytes of sensitive data, and authorities are investigating whether recent infiltrations of major European banks using a similar vulnerability are also linked to the attack, one of the people said.
In one case, the hackers used a zero-day vulnerability in one of the banks' websites, then plowed through layers of elaborate security to steal the data, a feat several security experts said appeared far beyond the capability of ordinary criminal hackers. The incidents occurred at a low point in relations between Russia and the West, as Russian troops continue to mass on the Ukrainian border and the West tightens sanctions aimed at crippling Russian companies, including some of the country's most important banks.
The sophistication of the attack and technical indicators extracted from the banks' computers provide some evidence of a government link, but the trail is muddy enough that investigators are considering the possibility that it's cyber criminals from Russia or even elsewhere in Eastern Europe. Other federal agencies, including the National Security Agency, are now aiding the investigation, a third person familiar with the probe said.
Comment: The trail is muddy enough, so we can blame it on Russia. The fact is that these 'investigators' are the ones muddying the trail. Are you conducting an investigation or jumping to conclusions and blaming Russia?
"The way the Russians do it, to the extent we can see into the process, is they encourage certain targets," said James Lewis, director of the Strategic Technologies program at the Center for Strategic and International Studies in Washington. "The Russians typically keep open the options to do something more, and the question now is what would trigger that and what would our response be."
Comment: Most likely, a pathological projection.
Calls to JPMorgan for comment were not immediately returned.
..the Chinese.
On a practical day to day level, its IP addresses from China that do the majority of hacking on US systems. Obama recently sent a complaint to the Chinese about it and they laughed at him, citing three letters N-S-A.
Even though this is a anecdotal sample, I run several servers and 95% of the attacks on them are of Chinese origin. Digging a bit I think you will find its the same across the US.
As always, who has the most to gain, financially and politically? Not Russia that's for sure.