Russian hacker claims he can prove he hacked DNC

[mystery-ak]

Russian hacker claims he can prove he hacked DNC
By Morgan Chalfant - 12/28/17 01:55 PM EST

A jailed Russian hacker who claims he was ordered by Russian intelligence to hack into Democratic National Committee (DNC) networks says that he can prove he was behind the breach.

Konstantin Kozlovsky, who has been jailed on cyber fraud charges in Russia, told independent Russian network TV Rain in a recent interview that he left a file on the DNC network containing markers to prove that he had been there.

Specifically, Kozlovsky said that he left a .dat file with his passport number and the number of his visa to Caribbean island Saint Martin on the DNC’s internal server, according to a written interview published Wednesday.

Kozlovsky is among a group of hackers arrested by Russian authorities last year for using malware to steal more than $25 million from Russian banks. Earlier this year, Kozlovsky posted a purported court testimony on Facebook that showed him claiming that he hacked the DNC on the orders of Russia’s Federal Security Service, or FSB.

more
http://thehill.com/policy/cybersecurity/366696-russian-hacker-claims-he-can-prove-he-hacked-dnc

[Oceander]

Why would a hacker who expects to get away with his leave identifying information on a hacked system?

[Fishrrman]

"Why would a hacker who expects to get away with his leave identifying information on a hacked system?"

Perhaps the file was password-protected, so only he could open it?
Left as a "cryptic calling card", so to speak.

Kind of a digital way of writing "Kilroy was here" on their system.
In other words... proof that "he was there", but a proof that could only be exposed with his cooperation.