Now Available! GreyNoise Tactics: See What Adversaries Do After They’re Inside.
Falcon Next-Gen SIEM unifies detection and response with real-time dashboards, correlation rules, and centralized case management. GreyNoise adds real-time edge observability and context to help detect attacks on edge devices.
Purpose-built dashboards and pre-built correlation rules operationalize four documented GreyNoise use cases in Falcon Next-Gen SIEM.
Internal corporate assets should not initiate outbound connections to internet infrastructure known to be hostile. When they do, it signals a potentially compromised edge device beaconing to known C2 infrastructure, becoming a vector for data exfiltration, or has been recruited into a larger botnet.
By matching outbound firewall, proxy, and EDR telemetry against the GreyNoise lookup file, SOC teams can immediately surface hosts communicating with infrastructure GreyNoise classifies as malicious. Instead of combing through hundreds of egress events, analysts can receive a list of potentially compromised edge devices that need immediate investigation or containment.
Authentication failures and brute-force attempts from the internet are constant for any perimeter device. The trouble is telling opportunistic account access apart from attempts aimed specifically at your organization. Hosts running mass scans or operating as part of botnet or proxy infrastructure authenticate to VPNs and identity providers all the time, and standard detection logic doesn’t flag it.
Apply GreyNoise lookup matching in Next-Gen SIEM identity searches to evaluate every authentication event, successful and failed, against a continuously refreshed threat context. Successful logins originating from GreyNoise-identified malicious infrastructure are immediately escalated. Failed attempts from flagged IPs also deserve scrutiny because they can indicate active targeting of your identity infrastructure.
Perimeter gaps often go unnoticed because nothing validates whether traffic that was allowed through should have been. Without external intelligence, traffic that passes through the firewall may not receive additional scrutiny, even when the source IP has a documented history of malicious activity.
Match allowed inbound firewall and WAF traffic against GreyNoise in Next-Gen SIEM. The correlation rule identifies source IPs classified as malicious or suspicious, surfacing both activity worth investigating and a firewall or WAF rule worth re-evaluating.
Every internet-facing organization is bombarded by automated scanners, bots, and opportunistic exploitation tools, generating thousands of firewall alerts per day that are not real threats. This leads to alert fatigue overwhelming SOC analysts, causing them to ignore alerts and miss real targeted attacks that get buried in the noise.
GreyNoise continuously observes the internet and labels IPs associated with scanner intelligence and malicious activity. In CrowdStrike Next-Gen SIEM, SOC teams can use the daily GreyNoise lookup feed to suppress known noise and keep analyst attention on activity that is more likely to represent real threat behavior.
The GreyNoise Foundry App is available now in the CrowdStrike Marketplace. Install it to deploy the Next-Gen SIEM dashboards and correlation rules in your CrowdStrike environment.
