An Australian hacker has pleaded guilty to hacking into an ISP's computers -- and threatening the company's owner with an axe.

"Bryce Kingsley Quilley, of Tailem Bend, South Australia, pleaded guilty to three counts of unlawful modification of computer data at the Adelaide firm that he used to work for, one aggravated count of threatening to cause harm and one aggravated count of threatening to damage property," writes Sophos' Graham Cluley.

"Court documents show the offences occurred at Tailem Bend on June 14 last year," writes The Herald Sun's Sean Fewster. "On three occasions that day -- between 12.20pm and 12.50pm, 5.40pm and 6.05pm and 9.40pm and 10.15pm -- Quilley hacked the servers of an internet service provider. That same day, he threatened to burn down the offices of the ISP and, while armed with an axe, threatened to cause harm to its owner."

"While neither the company nor the victim have been named in the court reports, The Register notes that Quilley is identified in Whois as the registrant contact for ngn.net.au, a games network owned by Adelaide ISP NuSkope," writes The Register's Richard Chirgwin. "Quilley’s Google+ page mentions 'NGN' as a former employer. He has been remanded on bail for sentencing in August."