Spike in Scanning Targets Palo Alto Login Portals Globally
🔍 GreyNoise observed a nearly 500% surge in IP addresses scanning Palo Alto Networks login portals on October 3, 2025, jumping from about 200 to roughly 1,300 unique IPs. The firm classified 93% of those IPs as suspicious and 7% as malicious, with most activity geolocated to the U.S. and smaller clusters in the U.K., the Netherlands, Canada and Russia. GreyNoise noted the traffic was targeted and structured and shared a dominant TLS fingerprint with recent Cisco ASA scans.
