Hackers calling themselves revengetheplanet on Monday attacked 156 Web sites hosted by Vietnam"s largest ISP (Internet service provider) and monopoly Internet gateway provider, Vietnam Data Communications Co. (VDC).
The intrusions were monitored by a foreign Internet services company in Vietnam which did not want to be publicly named as authorities have accused it of collusion in this attack and an earlier attack in August which erased 60 VDC-hosted Web sites.
The hackers, believed to be in based in the U.S., replaced the contents of the mainly government-linked Web sites with abuse about the weak level of Internet security maintained by VDC technicians. Many of the sites were down for as long as 10 hours, as the hackers were able to erase poorly secured backup content, according to the security company.