Hacking activist group Anonymous vowed to exact revenge on the Ukrainian government for its ongoing efforts to crackdown on the global operation of popular torrent file sharing site Demonoid.

CNET Australia reported on Thursday that hackers from Anonymous have commenced their attacks on websites maintained by specific Ukrainian government agencies, which the group said was its way of expressing displeasure over nations' actions that stifle unimpeded activities over the internet.

Earlier this week, Ukraine officials confirmed that Demonoid's data centre has been raided by police, effectively shutting down servers of the BitTorrent site that has become a favourite online exchange spot for global users wishing to freely access music, movie and software files.

Citing data from web analytic firm Alexa, PC World said Demonoid has become one of the most visited sites in the world, occupying the 950th spot and within the top 400 in the United States as of the first half of 2012.

The site was also on the watch list of the U.S. Justice Department as of last year, with Demonoid's operations, Washington said, attracting "further investigation for possible intellectual property rights infringements."

According to BBC, the U.S. government listed Demonoid as "among the top 600 websites in global traffic and the top 300 in U.S. traffic."

It is understood that U.S. authorities have been pressing on Ukraine to take definite actions on the BitTorrent site that operates within its borders and the latest development, according to Anonymous, proved that Kiev finally relented.

Media reports have been alluding Ukraine's action as a gift to the United States, which have been waging spirited campaigns against file-sharing sites that U.S. authorities said have so far resulted to hundreds of millions of losses for American music, movie and software producers.

Megaupload became the first high-profile casualty when it was closed down in January and tech experts said it was only logical that Demonoid was next in line with others to follow soon.

Tech news site TorrentFreak has reported that a top Ukraine official was scheduled to visit the United States this week to specifically discussed with Washington officials his government's solid measures of protecting intellectual properties not only American artists and producers but also of other nationalities.

But Anonymous labelled Kiev's actions as "deliberate and malicious attack against internet freedom."

In a video statement that the group has posted online, Anonymous pledged that Ukraine's unacceptable move will not go unpunished.

"Ukrainian Government, you have committed a crime against humanity and freedom. We will not tolerate this. We will take direct actions against you and your criminal friends until you realise the crimes you have committed and restore our beloved Demonoid," the hacking group warned.

Likewise, Anonymous has advised Ukraine officials that since they presented Demonoid as a gift to appease America "you can already expect your gifts from us."

To date, the National Television and Radio Broadcasting Council of Ukraine, the Ukrainian Agency for Copyright and Related Rights and the Ukrainian Anti-Piracy Association have come under distributed denial-of-service (DDoS) attacks, CNET reported.