It means the IP address appears in at least one threat intelligence blacklist, indicating it has been associated with suspicious or malicious activity such as spam, scanning or malware hosting.
Three questions every analyst asks before acting on this signal.
It means the IP address appears in at least one threat intelligence blacklist, indicating it has been associated with suspicious or malicious activity such as spam, scanning or malware hosting.
It shows that several independent blacklist providers report the same IP, which strongly increases confidence that the IP is part of abused or malicious infrastructure rather than a one-off false positive.
It indicates that the IP is listed by high-quality or curated feeds that have low false-positive rates, making this one of the strongest signals that traffic to or from this IP should be treated as high risk.
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_blacklisted",
"name": "High-Risk Blacklist Sources",
"group": "threat_intelligence_feed",
"subgroup": "ip_blacklist_reputation",
"direction": "malicious",
"evidence": {
"blacklist_count": 7,
"listing_sources": [
"spamhaus",
"abuseipdb",
"uribl"
],
"first_listed_days_ago": 3,
"last_listed_days_ago": 0
}
}3 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
It indicates that the IP was listed on blacklist feeds very shortly after the IP block or infrastructure was registered …
It means the IP has appeared in one or more threat intelligence blacklist datasets, indicating that it has been associat…
It means the IP matches several independent blacklist groups simultaneously, such as spam, malware hosting, scanning, bo…
The Verdict Gallery is a curated stream of real verdicts. Filter by this signal to see exactly which IOCs it caught, what other signals fired alongside it, and what the engine recommended.
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