Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

On May 27, 2022, the nao_sec independent security research group shared a VirusTotal link to a weaponized Microsoft Office document revealing a previously unknown vulnerability in the Microsoft Support Diagnostic Tool (MSDT). This vulnerability is most likely to be exploited via phishing lure attachments and is triggered when a document is opened.

Cybersecurity awareness, protection, and prevention is all-encompassing. In addition to implementing the right tools and resources, and hiring skilled professionals with the right cybersecurity education and experience, organizations should be aware of the latest CVEs.

On May 27, 2022, a Microsoft Office document was submitted from Belarus to VirusTotal, using a novel method to deliver its payload. This new technique was identified as a Zero-Day RCE (Remote Code Execution) vulnerability in Microsoft Support Diagnostic Tool (MSDT), which is now being tracked as CVE-2022-30190. As of this writing, it affects only Windows computers running with MSDT URI protocol enabled.

On Friday, May 27, 2022, Security vendor nao_sec identified a malicious document leveraging a zero-day remote code execution RCE vulnerability (CVE-2022-30190) in Microsoft Windows Support Diagnostic Tool (MSDT). The actively exploited vulnerability exists when MSDT is called using the URL protocol from a calling application, such as Microsoft Word.

If you want just to see how to find detections for the Follina MS Office RCE, skip down to the “detections” sections. Otherwise, read on for a quick breakdown of what happened, how to detect it, and MITRE ATT&CK mappings.

This blog describes the attack path we have uncovered during a recent penetration test of a web application, coupled with a back-end infrastructure assessment. Throughout we introduce different attack techniques and tools that can be used to attack the underlying infrastructure and APIs of a web application.

This month, Microsoft announced a vulnerability in NFS. The exploit lies in how an attacker can force a victim NFS server to request an address from the attacker’s fake NFS server. The address returned will overflow memory on the victim NFS server and cause a crash. Through Microsoft’s MAPP program, Corelight Labs reviewed a proof-of-concept exploit for this vulnerability and wrote a Zeek®-based detection for it. You can find a PCAP of this exploit in our GitHub repository.

This month, Microsoft announced a vulnerability in PPTP, a part of the VPN remote access services on Windows systems that runs on port 1723/tcp. Through Microsoft’s MAPP program, Corelight Labs reviewed a proof of concept exploit for this vulnerability and wrote a Zeek®-based detection for it.