It indicates that a small-sized IP prefix shows a concentration of malicious activity, such as repeated blacklist hits, high-risk domain density, or rapid domain churn, suggesting abuse within the allocation.
Three questions every analyst asks before acting on this signal.
It indicates that a small-sized IP prefix shows a concentration of malicious activity, such as repeated blacklist hits, high-risk domain density, or rapid domain churn, suggesting abuse within the allocation.
Small allocations are often inexpensive, easy to acquire and frequently used for short-lived or disposable malicious operations. When combined with observed abuse activity, they provide a strong malicious signal.
It is a meaningful malicious infrastructure signal. While prefix size alone is not risky, the presence of abuse patterns in a small allocation strongly suggests misuse and should elevate investigation priority.
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": "ip_registry_small_prefix_high_abuse_pattern",
"name": "Small Allocation Abuse Pattern",
"group": "dns_history",
"subgroup": "ip_registry_allocation_profile",
"direction": "malicious",
"evidence": {
"registry": "ARIN",
"allocation_class": "datacenter",
"cidr": "104.21.0.0/16",
"allocation_recency_days": 1340,
"block_risk": "low"
}
}5 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
It indicates that the IP block allocated to the ASN is unusually small. Very small prefixes are frequently observed in l…
It indicates that the IP block has the RIR status 'assigned', which is commonly associated with end-user or reseller add…
It means the IP block was assigned in a very recent time window. Newly allocated address space is frequently observed in…
It indicates that the IP address belongs to a large-scale, long-established, and officially allocated enterprise network…
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