The Cyber Security Agency (CSA) is working with Singtel and StarHub to provide more information on WannaCry to businesses and members of the public.
The telcos are setting up helplines to assist their customers.
Singtel customers can call 1688, while its SME customers can call 1606.
StarHub customers can call 1633, and its SME customers can call 1800-888-8888 for advice.
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"This is an issue of national importance and we will take all the necessary measures to counter the spread of the ransomware and help businesses and members of the public prevent or recover from it as quickly as possible," said CSA chief executive David Koh.
Help is also available via e-mail at firstname.lastname@example.org or by calling 6323-5052.
CSA's SingCERT (Singapore Computer Emergency Response Team) said that there is no known way to recover files encrypted by WannaCry.
To prevent the spread of WannaCry from an infected computer, it advised that one must start by removing the network connection .
The computer must be rebuilt before patching it and restoring it from backups made previously.
Security experts have urged organisations to keep their security software and operating systems up to date to protect themselves.
The hackers purportedly use a Windows exploit developed by the United States National Security Agency called EternalBlue.
It can infect machines running unpatched versions of Windows.