Interesting discussion on securityboulevard about the LSE outage last year. Expect to see this line trotted out more and more in the current situation and for attribution to become even more difficult:
[…] Now there’s the perfect cover for any cyberattacks or cyberdefense probing by adversaries of the US. Do all you want, leave a trail leading back to Iran.
Great time for Russia or NK to play around.