Defend against mass exploitation attacks

GreyNoise provides an early warning system for vulnerabilities being actively exploited in the wild, plus dynamic IP blocklists that security teams can use during their window of exposure.

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A new security strategy for defending against mass exploitation attacks

Early warning system

Get real-time visibility into whether a vulnerability is being actively exploited in the wild.

Close the “window of exposure”

Block mass exploit attack IPs at your perimeter to give yourself breathing space to patch.

Hunt for intrusions

Search for IP addresses that may have penetrated your defenses before you put blocking in place.

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Are you prepared for the next Log4j?

When a new vulnerability is disclosed, it's a race against time to see who can find vulnerable servers first. When the Apache Log4j vulnerability (CVE-2021-44228) was first announced, GreyNoise saw a dramatic spike in internet-wide scanning activity searching for servers that exposed this vulnerability.

Vulnerability disclosures like this can often generate a “mass exploitation attack,” with thousands of unique IP addresses searching for a vulnerability and generating billions or trillions of connection requests across the internet. This activity creates a storm of internet noise that makes it difficult to identify true threats.

For security teams, responding to this kind of event is extremely challenging. Under pressure of a newly announced vulnerability, they need to understand:

how serious the vulnerability is,
whether it is being actively exploited in the wild,
whether they are vulnerable, and
whether they may have already been compromised.

And if they have vulnerable systems, they might need to patch them on an emergency basis.

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The GreyNoise solution for defending mass exploitation attacks

GreyNoise helps security teams quickly identify and respond to mass exploitation attacks against new and existing vulnerabilities. GreyNoise attack telemetry allows security teams to:

identify trending internet attacks targeting specific vulnerabilities and CVEs,
quickly triage alerts based on malicious, benign, or targeted IP classifications, and
block and hunt for IP addresses opportunistically attacking a specific vulnerability.

Attack Trend Visibility

GreyNoise Trends gives security analysts an early warning system to identify and respond to internet attacks targeting specific vulnerabilities. he Trends graph shows the number of unique IP addresses targeting a specific vulnerability or CVE over time. This unique visualization allows security teams to identify and prioritize internet threats based on how actively a vulnerability is being exploited in the wild.

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IP Intent Classification

GreyNoise provides deep context into every IP address we observe mass-scanning for a specific CVE. We classify the intent of each IP based on its behavior and identity. Our customers use this data to quickly triage alerts during a mass exploitation attack, separating benign security firms and researchers from truly malicious sources.

Dynamic IP Block Lists

GreyNoise provides a dynamic list of IP addresses actively scanning for a vulnerability in the past 24 hours. This data can be used to provide near-term protection by blocking attacks at the firewall or WAF, as well as providing indicators of compromise to use to hunt for potentially compromised systems.

Taken together, this functionality allows security teams to quickly understand if a vulnerability is relevant to their organization, buying the time they need to put security defenses in place.

"The frequency of severe vulnerabilities in internet-facing enterprise software being massively exploited at scale has increased drastically.”

– Andrew Morris, Founder and CEO, GreyNoise

GreyNoise is used by SOC teams, cyber threat intelligence analysts, and security researchers at some of the world’s leading organizations.

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