SANS Stormcast Wednesday Feb 26th: M365 Infostealer Botnet; Mixing OpenID Keys; Malicious Medical Image Apps

SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

Massive Botnet Targets M365 with Password Spraying
A large botnet is targeting service accounts in M365 with credentials stolen by infostealer malware.
https://securityscorecard.com/wp-content/uploads/2025/02/MassiveBotnet-Report_022125_03.pdf
Mixing up Public and Private Keys in OpenID
The complex OpenID specificiation and the flexibility it supports enables careless administrators to publich private keys instead or in addition to public keys
https://blog.hboeck.de/archives/909-Mixing-up-Public-and-Private-Keys-in-OpenID-Connect-deployments.html
Healthcare Malware Hunt Part 1:
Medial images are often encoded in the DICOM format, an image format unique to medical imaging. Patients looking for viewers for DICOM images are tricked into downloading malware.
https://www.forescout.com/blog/healthcare-malware-hunt-part-1-silver-fox-apt-targets-philips-dicom-viewers/