Summary:GreyNoise Labs has released a free tool, GreyNoise IP Check, that allows users to quickly determine whether their IP address has been involved in malicious scanning operations, such as those associated with botnets and residential proxy networks. The firm notes that this issue has significantly increased over the past year, often with users unknowingly contributing to malicious activity after installing trojanized apps or browser extensions. While traditional methods for detecting involvement do exist, the IP check tool involves the least intrusive way to check. Users visiting the webpage will receive one of three results: Clean, Malicious/Suspicious, or Common Business Service.
For IPs flagged as suspicious, the platform provides a 90-day historical timeline to help identify the potential infection source. If a user receives a 'Malicious/Suspicious' result, they are advised to immediately run malware scans on all network devices, update firmware, and rotate administrative account credentials. An unauthenticated, rate-limit-free JSON API is also available for more advanced users via curl, and can be integrated into scripts or already established checking systems.
Security Officer Comments:The GreyNoise IP Check is an easily accessible defense for individual users. GreyNoise recommends users disable remote access features if they are unnecessary for operations. Given the documented surge in residential proxy and botnet activity, providing a non-intrusive IP check with historical context is an effective service to the community that will aid in identifying and mitigating widespread, often covert, infections.
Link(s):https://www.bleepingcomputer.com/news/security/greynoise-launches-free-scanner-to-check-if-youre-part-of-a-botnet/