Worldwide list of DDoS attacks that took place during the month of September 2021
| Date of attack | Country | Industry | Duration of Attack | Downtime | Company Affected | Size of Company | Attack Details | Press Link |
| Sep 28 | USA | VoIP | 3 Days | NA | Bandwidth.com | Enterprise |
Critical communications service providers targeted causing some phone calls and messages to fail.
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Click here |
| Sep 25 | Netherlands | Government | NA | NA | Ministry of Health – CoronaCheck System | NA | Prevented creation of QR codes that the government has necessitated to gain entry to catering and cultural establishments. | Click here |
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Sep 20 |
Canada | Telecom | 5 Days | 5 Days | VoIP ms | Enterprise | The ransom DDoS attack (demand of 100 bitcoins/$4.3M) disrupted the company’s operations, and telephony services | Click here |
| Sep 15 | Switzerland | Technology | 17 Hours | 17 Hours | Solana Foundation | Enterprise | Bots spammed the network as its protocol GRAPE launched its Initial Dex Offering (IDO) on the decentralized exchange (DEX) Raydium | Click here |
| Sep 14 | New Zealand | Government | 5 Days | 5 Days | MetService | NA | Affected several government and financial institutions also brought down the website in NZ | Click here |
| Sep 9 | Russia | ISP | 1 Month | No Downtime | Yandex | Enterprise | The DDoS attacks spread over a month reached 22 million requests per second (RPS) – the biggest known attack in the history of the internet. | Click here |
| Sept 8 | New Zealand | Government | 3 days | 3 Days | NZ Post | NA | NZ Post took down all its major IT systems as a result of a spate of DDoS attacks on New Zealand businesses. | Click here |
| Sep 8 | New Zealand | Banking | 3 Days | 3 Days | Australia and New Zealand Banking Group Ltd. (ANZ Bank) | Enterprise | ANZ New Zealand’s internet banking app and website went offline following a deadly DDoS attack. | Click here |
| Sep 6 | New Zealand | Banking | 5 Days | 5 Days | Kiwibank | Enterprise | The bank suffered from continued intermittent issues” with some services including internet banking, its app, website and phone services. | Click here |
| Sep 3 | New Zealand | ISP | 5 Days | 5 Days | Vocus NZ | Enterprise | Vocus’s systems tried to block a DDoS attack on one user but in the process caused its customers across Auckland, Wellington and Christchurch to suffer outages | Click here |
| Sep 1 | UK | Telecom | 1-2 Days | 1-2 Days | Voipfone | Small | Voipfone’s voice communications affected and remain unresolved with customers, partners and some broadband ISPs reporting communication issues | Click here |
| Sept 1 | UK | Telecom | 3 Days | 3 Days | Voip Unlimited | Small | Victim of an alarmingly large and sophisticated DDoS attack attached to a colossal ransom demand. | Click here |
