On April 3, the National Security Agency (NSA) and partners released the joint Cybersecurity Advisory (CSA), “Fast Flux: A National Security Threat,” to warn about how cyber actors are using a technique called fast flux to conceal their activities by rapidly changing the IP address associated with a domain name.
The fast flux technique threatens national security as it enables cybercriminals and nation-state actors to create resilient, highly available command and control (C2) infrastructure and hide malicious activities. This infrastructure makes tracking and blocking malicious activity more difficult and can be used by threat actors to conduct espionage and obscure other cyber techniques, such as phishing campaigns and distributed denial of service attempts.
“Fast flux is an ongoing, serious threat to national security, and this guidance shares important insight we’ve gathered about the threat,” said Dave Luber, NSA Cybersecurity Director. “It is imperative cybersecurity providers, especially Protective DNS providers, follow these guidelines to safeguard critical infrastructure and sensitive information.”
NSA and the partnering agencies recommend cybersecurity providers implement a multi-layered approach to detection, and organizations leverage Protective DNS (PDNS) services that offer protection from fast flux enabled threats. Organizations—especially those within the Department of Defense (DoD) and Defense Industrial Base (DIB)—should use cybersecurity and PDNS services that aid in blocking malicious activity.
Additional co-authors are the Cybersecurity and Infrastructure Security Agency (CISA); the Federal Bureau of Investigation (FBI); the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC); the Canadian Centre for Cyber Security (CCCS); and the New Zealand National Cyber Security Centre (NCSC-NZ).
Read the full report on Fast Flux here.
Source: NSA
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