According to the television documentary Crisis which aired on NBC last Sunday, a cyberattack took over the entire Internet.

Timecode 13:00: "Anything connected to the Internet. Banking systems, power grid, air traffic control, emergency services. The virus has spread into them all."

And the show includes an amazing journalistic scoop: A screen shot of the attack being launched! Timecode 11:40:

Threads Progress Remaining Speed
0:000> u eip-30 eip+20 notepad+0x5cfc: 01005cfc 0001 add [ecx],al 01005cfe 3bc7 cmp eax,edi 01005d00 7407 jz notepad+0x5d09 (01005d09) 01005d02 50 push eax 01005d03 ff15dc100001 call dword ptr [notepad+0x10dc (010010dc)] 01005d09 8b45fc mov eax,[ebp-0x4] 01005d0c 57 push edi 01005d0d 57 push edi 01005d0e 68c50000 push 0xc5

That's right, my friends. This elite virus that shut down the Internet was an upload of Notepad!