The trio, who called themselves thekiller, BlacKcODe and extreme_army, posted what seemed to be the first edition of Tales Mutated for the MOD, a Terry Beatty horror comic.
According to Attrition.org, an independent organization that records hacking incidents, this is the second strike on a hospital website by the group.
The website was could not be accessed for a large part of the morning but was restored before midnight.
"We're aware of the incident and the matter is currently being investigated," said a hospital spokesperson when contacted yesterday afternoon. She declined to elaborate.
A mirror of the defacement can be found at the Attrition site.
Hacking is a serious offence in Singapore and the Government has not hesitated to punish the guilty, no matter how young.
Last October, a 17-year old hacker got his punishment increased from probation to a jail sentence.
First-time offender Muhammad Nuzaihan Kamal Luddin was put on 2 1/2 years probation by a district court for hacking into Swifttech Automation and Singapore Cable Vision (SCV) servers.
But this was later set aside by Chief Justice Yong Pung How and the Secondary 5 student at Geylang Methodist Secondary was jailed for four months instead.
The CJ said hacking into computers was a serious crime and if left unchecked could compromise Singapore's efforts of becoming a global e-commerce hub.
To date, four Singaporeans, all aged below 23, have been put behind bars for various hacking offences. They are:
• October 1999: Muhammad Nuzaihan Kamal Luddin, 17 was sentenced to four months jail for hacking into Swifttech Automation and Singapore Cable Vision (SCV) servers.
• September 1999: A 15-year old Myanmar national was sentenced to one year probation and 100 hours community service for hacking into the Television Corporation of Singapore (TCS), Mediacity, website.
• November 1999: Both Pang Soon Cheng, 19, and Kok Tuck Whye, 22, were found guilty of a whopping 111 offences. Both were convicted for hacking into computer systems of Internet users and posting their passwords on a website. Pang was imprisoned for 15 months while Kok was sentenced to eight months jail.
• December 1999: Edwin Lim Zhaoming, 18, was sentenced to five months jail for hacking into Mediacity (together with the Myanmar national). He is appealing against his sentence. Later in the month, albeit a cruel blow to his new year preparations, a Nanyang Polytechnic student paid the price for a total of six hacking incidents. Goh Tze Loon, 21, was slapped a two month jail term and S$2,000 fine for illegally using a SingNet account and for breaking into the Telia Internet server in Norway.
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