cnn money tech correspondent lori segal has more on that. >> you want us to kill the leader of northorea? >> yes. >> what? >> the next sony hack is for sale in the corners of the web. to bring down a web page for an hour, only $2 to $60 on this russian underground page. to redirect to a different site, 750 bucks. what about the attack on sony? >> $500 to $1,000 coding time. >> reporter: all these services available for purchase on the dark web, in the deep corners on the internet accessed through encrypted browsers. the fbi may have tracked it to north korea, but in the wild west of the internet, you don't have to be a criminal to launch the attack. you just need an internet connection. >> you don't need to be a coder to add a grenade to it. >> reporter: many in russia, brazil and china are making millions. >> people are thinking they want to visit the forums, be well aware, the second you enter, you have been hacked. >> reporter: as they thrive, more cyber criminals could get their hands on keys to major corporations. what makes this different? it wasn't about money. >> most have a

we have to talk about this with lori segal. what are the issues in california, specifically?ntioned background checks. >> yeah. >> the san francisco d.a. saying you guys aren't complying with the same background checks that our taxis here are complying to. these guys have to go in and get fingerprinted. uber drivers don't have to do that. i spoke with the san francisco d.a. earlier and they're filling out online applications and it's not as safe of a process. he also said that they've been looking at uber over the last year and they sent them multiple cease-and-desists and there are extra charges sometimes that they're saying that shouldn't be the case and one thing he said to me, brooke, that i thought was interesting was about your protection. if god forbid something were to happen to you when you were in an uber you might not have the same protection as if you were in a cab. listen to what he said. >> you look at the fine print in most of their stuff that they put out to the consumer and basically they're telling the consumer we assume no liability for you riding in one of

cnn correspondent lori segal shows us some of the posts and how police think it will lead to a motive>> as we piece together this tragedy we're also piecing together the digital footprint of the shooter behind this horrific event. he had an extensive social media profile. i want to gef yive you a little sample of that. the last post he posted on facebook. "i always wanted to be known for doing something right but my past is stalking me and my future is haunting me." he said why live if you don't love to live. when we heard from the nypd, commissioner bratton, he spoke quite a bit about these digital crews and instagram and how the shooter had posted on instagram and they were piecing together the motivation behind this tragedy. i want to get to one of the suspicious posts allegedly posted by the shooter. he said "i'm putting wings on pigs today. they took one of ourksz let's take two of theirs." he also goes on to say "this may be my final post with a picture of a gun and emoeji bullet." so you really begin to wrap your head around the clues and motivations behind this horrific attack