New Sysrv-k Botnet Infecting Windows and Linux Systems with Cryptominer

Microsoft has discovered a new Sysrv botnet variant deploying cryptocurrency miners on Windows and Linux systems.

The Microsoft Security Intelligence team posted a series of tweets on their official Twitter handle (@MsftSecIntel) to reveal startling details on the new variant of the notorious Sysrv botnet dubbed Sysrv-K.

According to the thread, the new variant exploits vulnerabilities recently identified in the Spring Framework’s API gateway called the Spring Cloud Gateway and WordPress and deploys cryptocurrency miners on Windows and Linux systems.

How does the Botnet work?

According to Microsoft, the botnet first scans the web to identify vulnerable servers and installs itself. The vulnerabilities it looks for include remote file disclosure, remote code execution, path traversal, and arbitrary file download.

The tech giant noted that Sysrv-K exploits numerous old flaws, particularly those identified in WordPress, as well as new vulnerabilities like CVE-2022-22947, which has a CVSS score of 10 and affects the Spring Cloud Gateway and Oracle’s Communications Cloud-Native Core Network Exposure Function.

The vulnerability exposes apps to code injection attacks and allows unauthorized attackers to carry out remote code execution. Interestingly, all these vulnerabilities have patches.

Details of Sysrv and Sysrv-K

The Sysrv botnet has been active since late 2020 and exploits known

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