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Evaluating the cost of a DDoS attack

An ex-IT bod accused of masquerading as hacker "Demon Killer" to infiltrate PCs and send out a string of murderous threats in 2012 has protested his innocence at the opening of his trial in Tokyo District Court.

Yusuke Katayama, who was an employee at an unnamed technology company, was finally nabbed in February 2013 after allegedly leading Japans tech-illiterate police force a merry dance.

Hes accused of using online forums including the popular 2channel to infect users with the remote control virus iesys.exe.

He then allegedly used these proxy machines to send out abusive messages, which included bomb threats against a school and kindergarten attended by the Emperors grandchildren and a warning of an impending killing spree on the streets of Osaka.

Katayama also allegedly threatened to blow up a Japan Airlines flight to New York an incident which ended up costing JAL 9.75 million, according to Japan Times.

The accused caused much embarrassment for Japans National Police Agency.

Not only did they arrest and detain the owners of the hacked PCs, holding one for several weeks, before realising their mistake, but they were also led on a wild goose chase by Demon Killer.

This celebrated case involved police following a set of emailed riddles which finally led them to the island of Enoshima near Tokyo, where they found a cat.

Said feline had an SD card attached to its collar which contained a message claiming the culprit had been wronged by the police in the past.

Link:
'Demon Killer' who tied SD card to cat pleads not guilty