Rising Tide of DDoS Attacks: CISA Issues Warning and Guidance


Published on Jun 30, 2023   —   2 min read

Photo by NASA / Unsplash

Deciphering the Threat Landscape and Building Resilience


The digital age has brought about a wealth of opportunities, but not without its fair share of challenges. In the realm of cybersecurity, one such challenge that continues to pose a significant threat is the distributed denial-of-service (DDoS) attack. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) recently issued a stern warning about the surge in these attacks, affecting a wide array of organizations across multiple sectors​.

The Rising Threat

DDoS attacks are designed to overwhelm targeted online portals or services with an inundation of internet traffic. This makes the services inaccessible to legitimate users and can severely disrupt operations. The impact of these attacks extends beyond service disruption, carrying substantial reputational costs and financial losses for the targeted organizations​.

In light of recent events, CISA advises all U.S. organizations to augment their security measures in anticipation of potential attacks. This includes swift implementation of firewall rules and redirection of incoming malicious traffic through DoS protection services. Internet service providers (ISPs) also have a crucial role to play in providing additional guidance on appropriate countermeasures during such situations​​.

CISA, in collaboration with the FBI and MS-ISAC, has provided an extensive guide on the necessary steps organizations should take before and after a DDoS attack. This includes enrollment in dedicated DDoS protection services capable of rerouting malicious traffic away from targeted assets. The federal civilian executive branch (FCEB) agencies have also been advised to leverage General Services Administration (GSA) tools such as the Managed Security Service (MSS) and the Managed Trusted Internet Protocol Service (MTIPS) to counter the effects of DDoS attacks and restore operation of impacted systems​1​.

Behind the Attacks

Recent DDoS attacks have been claimed by a threat actor known as Anonymous Sudan, tracked as Storm-1359 by Microsoft. Some cybersecurity researchers speculate this group might have links to Russia. The group has been responsible for a series of attacks, targeting both private and government organizations, including the U.S. Treasury Department's Electronic Federal Tax Payment System (EFTPS), the U.S. Commerce Department's website, and Stripe's dashboard for managing business payments, refunds, and operations​.

Earlier in the month, Microsoft confirmed that multiple outages impacting its Outlook, OneDrive, and Azure web portals resulted from DDoS attacks claimed by Anonymous Sudan. The group has targeted several large organizations worldwide since May, including Scandinavian Airlines (SAS), Tinder, Lyft, and numerous hospitals across the United States​.


The recent surge in DDoS attacks serves as a sobering reminder of the ongoing threats in our interconnected digital world. Organizations of all sizes and sectors must ensure they have robust security measures in place to defend against such attacks and mitigate their potential impact. By staying informed about the evolving threat landscape and adopting recommended security measures, we can build resilience and ensure the integrity of our digital infrastructure.

Stay vigilant, stay safe.

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