Silver Fox Uses Fake Microsoft Teams Installer to Spread ValleyRAT Malware in China

The threat actor known as Silver Fox has been spotted orchestrating a false flag operation to mimic a Russian threat group in attacks targeting organizations in China. The search engine optimization SEO poisoning campaign leverages Microsoft Teams lures to trick unsuspecting users into downloadin...

Malvertising Campaign Leads to Execution of Oyster Backdoor

The following analysts contributed to this blog: Thomas Elkins, Daniel Thiede, Josh Lockwood, Tyler McGraw, and Sasha Kovalev. Executive Summary Rapid7 has observed a recent malvertising campaign that lures users into downloading malicious installers for popular software such as Google Chrome and...