> The DNC had NGP VAN software installed on their system so I used the 0-day exploit and then deployed my backdoor.
The NGP VAN is a service, not a piece of software, and most of the software NGP provide isn't internet accessible. Plus there's also the sticky issue of how he would get ahold of it to fuzz it.
On this issue I believe CrowdStrike. He purchased malware on the black market ($1.5K per this FAQ) and then emailed it to tons of people at the DNC until some moron clicked.
This FAQ has a few obvious lies like that in it, like his poor English is another obvious lie since they are so inconsistent with it.
I think they read about the NGP VAN and then made up the zero day story to make themselves seem more badass. This individual strikes me as your typical script kiddy, in particular considering how much they glorify Guccifer (1) who themselves was a script kiddy.
PS - Crowdstrike are still wrong about the Russian intelligence claims, they never had one shred of proof, even after posting their supposed "proof" it was all just generic hacktools and things you can buy on Tor.