What’s unusual about the arrest of Denis Obrezko is how relatively rare it is for Russian hackers to be detained abroad these days. What’s also unusual: Obrezko used to work for Russia’s FSB. And it also appears he was careless.

Denis Obrezko, who last week pleaded not guilty to computer crimes at a hearing in Boston, worked for Moscow-based antivirus firm Kaspersky Lab in the years before his alleged…

What’s unusual about the arrest of Denis Obrezko is how relatively rare it is for Russian hackers to be detained abroad these days. What’s also unusual: Obrezko used to work for…