FireEye has released GeoLogonalyzer, an open source tool that can help organizations detect malicious logins based on geolocation and other data.
Many organizations need to allow their employees to connect to enterprise systems from anywhere in the world. However, threat actors often rely on stolen credentials to access a targeted company’s systems.
Identifying legitimate logins and malicious ones can be challenging, but FireEye hopes to solve the problem with its GeoLogonalyzer, which leverages what the company calls GeoFeasibility.
GeoLogonalyzer analyzes authentication logs containing timestamps, usernames, and IP addresses, and highlights any changes, including related to anomalies, data center hosting information, location data, ASN information, and time and distance metrics.
GeoFeasibility looks at the location of the user who initiated a login in an effort to determine if the login is suspicious or not. For example, if a user connects to a company VPN from the United States, they are unlikely to connect to the VPN from Australia a few minutes later.
In addition to checking if accounts authenticate from two distant geographical locations in a short timeframe, GeoLogonalyzer looks at accounts that usually log in from IP addresses registered to one physical location, but also authenticate from places where the user is unlikely to be.
Logins from a foreign location where no employees reside or are expected to travel to, and where the organization does not have any business contacts will also raise a red flag.
Less obvious login patterns may also be considered suspicious, including user accounts that typically log in from one IP address, subnet or ASN, but also have a small number of logins from a different source, or ones that log in from IP addresses registered to cloud server hosting providers. Users who log in from multiple source hostnames or with multiple VPN clients are also considered suspicious.
Additional information and usage instructions are available on GitHub and FireEye’s blog post.
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