The collapse of popular BitTorrent site Demonoid appears to be in the final stage as TorrentFreak reported over the weekend that domain names associated with the file-sharing website were currently up for sale.

"The three key Demonoid domains - Demonoid.me, Demonoid.com and Demonoid.ph - are now all up for sale on Sedo," TorrentFreak said on Sunday.

The latest development also confirmed the active involvements of the International Federation of the Phonographic Industry (IFPI) and global police agency Interpol in taking down Demonoid, which prior to the actual crackdown has encountered distributed denial of service attacks (DDoS) that prevented users from accessing it.

In a statement, IFPI anti-piracy director Jeremy Banks disclosed that "the operation to close Demonoid was a great example of international cooperation to tackle a service that was facilitating the illegal distribution of music on a vast scale."

"I would like to thank all those officers involved in this operation to close a business that was built on the abuse of other people's rights," Mr Banks added.

With only the tech admin remaining under Demonoid's control, it is unlikely that the site can be resurrected any sooner, said TorrentFreak, which also reported that Mexican and Ukrainian authorities have ramped up their efforts to clamp down on the site's global operations.

Kiev has reportedly applied pressures on Demonoid's Ukrainian ISP to abandon the BitTorrent website while reports emerged too that Demonoid management officials were arrested in Mexico.

Media reports have indicated that Demonoid's doom was sealed when Ukraine caved in to pressures coming from the United States, which has labelled the site as one of the major sources of illegitimate internet contents.

U.S. authorities included Demonoid to its 'Notorious Market List', which tagged physical and online markets that "exemplify the problem of marketplaces dealing in infringing goods and helping sustain global piracy," according to CNET.

Earlier last week, Kiev announced the official visit of its deputy prime minister to Washington, which further underscored the Ukrainian government's aim of pleasing its U.S. counterpart.

Shutting Demonoid served as Ukraine's gift to the United States, media reports said, which has been stepping up its efforts to neutralise and prosecute illegal internet activities that it claimed led to hundreds of millions of losses for American producers of music, movies and softwares.

Also, Kiev's actions elicited the attention of hacking activist group Anonymous, which late last week launched attacks on website maintained by the Ukrainian government.

Anonymous deemed the shut down of Demonoid as tantamount to stifling freedom in the cyber world and vowed that what Kiev has done will not go unpunished.

The group also pledged to do its share in restoring the old glory of Demonoid, which prior to its disappearance was regarded as one of the web's largest generator of online traffic.

Analysts, however, are doubtful if Demonoid would be able to climb up from the pit as they viewed its domains sales as the last straw that would clearly spell its demise.