The group sent an e-mail to the technology news source Pro Pakistani announcing they had inserted a file just to let the government Web masters know they had successfully hacked their servers and could deface the sites.
The server in question hosts at least 40 Pakistani government Web sites including those of the Pakistan navy, the Ministry of Foreign Affairs, the National Assembly and the Ministry of Science and Technology, among others.
A report by Pakistani government experts said the cyberattack had been successfully thwarted, Pakistan's Dawn News reported.
The hacking attempt appears to be associated with the Nov. 26, 2008, Mumbai massacre, Pro Pakistani said.
Earlier, Indian hackers threatened on various forums to deface major Pakistani Web sites to protest the incident carried out by Islamic terrorists from Pakistan.