SANS Stormcast Tuesday Mar 4th: Mark of the Web Details; Sharepint and Click-Fix Phishing; Paragon Partionmanager BYOVD Exploit
Update: 2025-03-04
Description
Mark of the Web: Some Technical Details
Windows implements the "Mark of the Web" (MotW) as an alternate data stream that contains not just the "zoneid" of where the file came from, but may include other data like the exact URL and referrer.
https://isc.sans.edu/diary/Mark%20of%20the%20Web%3A%20Some%20Technical%20Details/31732
Havoc Sharepoint with Microsoft Graph API
A recent phishing attack observed by Fortinet uses a simple HTML email to trick a user into copy pasting powershell into their system to execute additional code. Most of the malware interaction uses a Sharepoint site via Microsoft's Graph API futher hiding the malicious traffic
https://www.fortinet.com/blog/threat-research/havoc-sharepoint-with-microsoft-graph-api-turns-into-fud-c2
Paragon Partition Manager Exploit
A vulnerable Paragon Partition Manager has been user recently to escalate privileges for ransomware deployment. Even if you to not have PAragon installed: An attacker may just "bring the vulnerable driver" to your system.
https://kb.cert.org/vuls/id/726882
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