SINGAPORE (Reuters) – Singaporean telecoms service provider StarHub said intentional cyber attacks had caused internet connection disruption for some of its home broadband customers on Oct. 22 and Oct. 24.
The company said it analyzed network logs of the disruptions and found that it had experienced intentional and likely malicious distributed denial-of-service (DDoS) attacks on its domain name servers (DNS).
DDoS attackers typically target sites by flooding servers with messages from multiple systems so they are unable to respond to legitimate traffic.
StarHub said there was no evidence of any impact on the rest of its services, and the security of its customers’ information was not compromised.
“On both occasions, we mitigated the attacks by filtering unwanted traffic and increasing our DNS capacity, and restored service within two hours,” it said in a statement late on Tuesday.
The incidents come close on the heels of attacks on Twitter, PayPal, Spotify and other customers of Dyn, a US company which acts as a switchboard for internet traffic.
StarHub said it was investigating the intent and source of the two attacks, which it called “unprecedented in scale, nature and complexity” for the company.
It told Reuters in an email on Wednesday that it does not use Dyn services.
As of June 30, StarHub’s residential broadband subscribers totalled 473,000.
Singapore authorities on Tuesday advised other telecom firms to strengthen defences to protect against similar disruptions.
Singtel, the city-state’s biggest telecom operator, said it did not observe any abnormal traffic trends over the weekend but will continue to monitor networks closely. Third-ranked M1 said it was aware of the cyber attacks and was on alert.
(Reporting by Aradhana Aravindan; Editing by Christopher Cushing)