Intrusions attempting to infiltrate Palo Alto GlobalProtect portals and scanning SonicWall SonicOS API endpoints as part of a dual campaign have been underway since Dec. 2, according to Security Affairs.
More than 7,000 IP addresses linked to German hosting provider 3xK GmbH have sought to log in to GlobalProtect portals, with the attack traffic recycling a trio of client fingerprints previously observed in attacks between late September and mid-October, reported GreyNoise researchers. Such fingerprints were also evident in the surge of SonicWall SonicOS API scans on Dec. 3, indicating similar tooling.
Organizations' network defenders have been advised to not only track atypical velocity or persistent failures in authentication surfaces but also monitor recurring client fingerprints while implementing "dynamic" and "context-aware" blocking to better protect their systems from potential compromise.
"Fingerprint-level telemetry exposes cross-infrastructure relationships that defenders might otherwise miss," said GreyNoise.
