Summary: CISA, the FBI, and NSA are urging organizations to address the “Fast Flux” evasion technique employed by threat actors to evade detection. This DNS tactic makes tracking malicious activities difficult by rapidly changing IP addresses. The bulletin highlights detection and mitigation strategies to combat this technique used by various cybercriminals and ransomware groups.
Affected: Organizations and DNS providers
Keypoints :
- Fast Flux involves rapidly changing DNS records, complicating efforts to trace malicious activity.
- Types include Single Flux (rotating IP addresses) and Double Flux (changing DNS name servers).
- CISA recommends analyzing DNS logs, using threat feeds, monitoring traffic, and implementing detection algorithms for mitigation.