Monday, May 30th, 2022, Microsoft issued CVE-2022-30190 for a Remote Code Execution vulnerability with the Microsoft Support Diagnostic Tool (MSDT) in Windows: “A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application.

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.

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.

This month, Microsoft announced two vulnerabilities in portmap, which is part of ONC RPC, on Windows systems. This blog will discuss Zeek detection packages for CVE-2022-24491 and CVE-2022-24497 developed by Corelight Labs.

The Windows ‘Administrator’ account is a highly privileged account that is created during a Windows installation by default. If this account is not properly secured, attackers may leverage it to conduct privilege escalation and lateral movement. When this account is used for administrative purposes, it can be difficult to distinguish between legitimate and malicious activity.

April Patch Tuesday brings 145 vulnerability fixes from Microsoft — the highest number in 19 months—including CVE-2022-26809, a critical remote code execution (RCE) vulnerability in Windows Remote Procedure Call (RPC) Runtime library that impacts all supported Windows products. Notably, Microsoft also released security updates for Windows 7, an end-of-life product since January 2020, which highlights the severity of CVE-2022-26809.

The latest Windows versions are compatible with NTLM and default NTLM implementation necessitates Active Directory. Microsoft has shared instructions on mitigating PetitPotam a type of NTLM relay attack that is used against Windows domain servers or controllers. Microsoft has referred to it as the ‘classic’ NTLM (ADV210003) relay attack allowing an attacker to take over domain controller or other Windows servers.

When we released 1Password 8 for Windows, it marked the start of the next chapter for 1Password. And though Santa may have come and gone in the weeks since, we’ve still got a bag full of shiny new toys for our Windows customers.

Securing your Windows servers and Windows 10 running is vital, especially given today’s sophisticated threat landscape. These are usually the first machines to be compromised in an attack through exploitation of the weakest link in the chain — the user. Through trickery and social engineering, threat actors gain access to these machines and then seek to move laterally and elevate their privileges.

UNC (Universal Naming Convention) identifies servers, printers, and other resources in the UNIX/Windows Community. The name of a computer is anteceded in a UNC path by double slashes or backslashes. Local disk or directories UNC paths are separated by a single slash or backslash.