In the little challenge, well done to those spotting that the bottom row of letters on Colin's keyboard doesn't work and that the url address that the UK accidental hero found didn't have any of these letters in it.
However, it is unlikely that Colin wrote the malware as he has never used a computer.
(Even if Colin had written the malware using his laptop without the bottom row of letters, he would have had difficulty writing the rest of the code. He wouldn't even have been able to type '.com'.)
So that narrows it down to one of the others.