Skip down to the section labeled "What we think happened".

Essentially, someone took over the Network Solutions domain management account for the domain and transferred it to a different registrar.

It's not clear if that was due to a weak password, compromised contact email account, someone social engineering the Network Solutions staff, or something else.

What actually happened is that a bunch of domain names were stolen at network solutions. Many of which start with the letter P. Perl was just one of them.

We probably will never know how it was done, as network solutions won’t say, and they shouldn’t.

The article reads kind of like those online recipes that have 2 pages of "My mom grew up on a farm, and her mom liked buttermilk, so this is the story of how this recipe began..." If all you want is the recipe, you need to scroll past that long intro (which might be interesting, but it's not what you are looking for).