It indicates that both IP and NS (nameserver) records of a domain are changing frequently, a behavior known as 'Double-Flux'. This technique is commonly used by advanced threat actors to enhance infrastructure resilience and avoid takedown or tracking.
Three questions every analyst asks before acting on this signal.
It indicates that both IP and NS (nameserver) records of a domain are changing frequently, a behavior known as 'Double-Flux'. This technique is commonly used by advanced threat actors to enhance infrastructure resilience and avoid takedown or tracking.
This refers to an extreme variant of double-flux behavior where NS and IP changes occur within very short intervals. Such rapid cycling often indicates a highly dynamic and evasive malicious infrastructure.
Legitimate domains rarely need to rotate NS and IP records frequently. Double-flux techniques are characteristic of botnets, malware delivery networks, and resilient C2 architectures designed to resist disruption.
A realistic shape of the entry the engine appends to the risk_signals array when this signal fires. Evidence keys are subgroup-default; per-signal overrides documented in the API reference.
{
"slug": "too_many_ns_change",
"name": "Double-Flux Behavior Detected",
"group": "dns_history",
"subgroup": "dns_records_mx_ns",
"direction": "malicious",
"evidence": {
"ns_provider": "cloudflare.com",
"ns_provider_tier": "paid_public",
"ns_stability_days": 412,
"mx_provider": "google.com",
"mx_provider_tier": "paid_mail"
}
}8 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
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