No

A cyber attack is a cyber operation, whether offensive or defensive, that is reasonably expected to cause injury or death to persons or damage or destruction to objects.

Michael Schmitt et al; Tallinn Manual 1.0, pp 92
  • Cyber Operation?
  • Expected to cause death or injury to people or damage to objects?
Asymmetrical cyber operations conducted by Israel and Iran does not match this definition. Here's a list of actual cyberattacks and and why this matters.

What happened?

Israel temporarily disabled Iran’s nationwide fuel distribution system which paralyzed 4,300 gas stations in the country and took 12 days to restore. A few days later, Iran conducted an operation against an Israeli medical facility and doxxed users of a popular L.G.B.T.Q. dating site.