Ransomware Attack on Office365 Corporate Users


A phishing campaign was discovered last week that targeted possibly millions of users of Microsoft's Office365 Corporate service. The campaign was delivering the Cerber ransomware, which encrypts documents, videos, and photos on the compromised computer, as well as any network file shares to which the compromised computer is attached, and then demands a ransom to provide the ability to decrypt them.

The malware was delivered via a document with malicious macros embedded in it. Previous versions of Cerber were delivered via web-based exploits that exploited Flash vulnerabilities.

The malware was able to bypass the built-in security tools in Office365, but was detected using the Check Point SandBlast malware protection system. The SandBlast technology can run on a Check Point firewall, as an agent on network endpoints, or as a cloud-based service. To learn more about Check Point Sandblast, contact Anchor.

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