Chinese hackers infiltrated U.S. Department of Defense networks in an operation known as “Titan Rain.” They targeted U.S. defense contractors, Army Information Systems Engineering Command; the Defense Information Systems Agency; the Naval Ocean Systems Center; and the U.S. Army Space and Strategic Defense installation.
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?
Titan Rain does not match this definition. Here's a list of actual cyberattacks and and why this matters.