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Attacker infrastructure is the network of servers, domains, hosting accounts, and cloud resources that threat actors use to stage, execute, and persist attacks. It includes command-and-control servers, phishing-page hosting, malware-distribution hosts, exfiltration endpoints, and the registrar accounts and hosting providers attackers favor. TacitRed maps attacker infrastructure across more than 13 million US companies through passive NetFlow analysis.
Knowing where attackers live and what they touch is the foundation for proactive defense. An organization that can see attacker infrastructure communicating with its own assets has detected a likely compromise before the impact lands. The opposite, waiting for an alert from inside the perimeter, is a slower posture.
The challenge is that attacker infrastructure rotates fast. Domains burn in hours. Hosting accounts get suspended. IPs move between tenants. The mapping has to be continuous and large-scale to stay useful.
It is a substrate for threat intelligence production. NetFlow analysis is one of the primary ways to map it. Compromised host detection depends on seeing internal assets communicate with attacker infrastructure.
TacitRed observes that an IP block historically used by a known ransomware affiliate is now communicating with a mid-size manufacturer’s servers. The signal becomes a high-priority alert in the customer’s TacitRed feed before the ransomware payload has finished staging. A second example: a CTI analyst correlates a recent phishing campaign’s hosting infrastructure to attacker-controlled hosting accounts at a specific cloud provider, leading to a coordinated takedown.
TacitRed uses passive NetFlow analysis at internet scale, observing connection metadata to identify infrastructure that communicates with attacker hosts. It complements active scanning with passive observation.
No. Attacker infrastructure spans the clear web, the dark web, and legitimate hosting providers misused by attackers. Most attacker infrastructure lives on commercial cloud and hosting platforms.
TacitRed updates continuously. New compromise indicators surface as soon as the underlying NetFlow patterns are observed, typically within minutes of the attacker activity.
No. They are complementary. Infrastructure mapping provides external evidence of compromise; EDR provides endpoint-level forensics. Mature programs use both.
Last updated: 2026-05-20.
