ConsentFix (a.k.a. AuthCodeFix): Detecting OAuth2 Authorization Code Phishing

ConsentFix (a.k.a.AuthCodeFix) is the latest variant of the fix-type phishing attacks, initially identified by Push Security. In this technique, the adversary tricks the victim into generating an OAuth authorization code that is part of a localhost URL, by signing in to the Azure CLI instance (or other vulnerable applications). Then, the victim is instructed to copy that URL and paste it into a phishing website, essentially handing over the authorization code to the adversary, who is now able to exchange it for an access token. Using the access token, the adversary gets access to the victim's Microsoft account.

Validate your Windows Audit Policy Configuration with KQL

We provide a KQL query that will help you validate your defined Windows audit security policy configuration. Defining a Windows audit policy is an important step in establishing a robust security posture. Ensuring that the audit policy is applied consistently across your environment is just as important as defining that policy and quality controls should be in place.

Kusto hunting query for CVE-2021-40444

Introduction On September 7th 2021, Microsoft published customer guidance concerning CVE-2021-40444, an MSHTML Remote Code Execution Vulnerability: Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.An attacker could craft a … Continue reading Kusto hunting query for CVE-2021-40444 →

Sentinel Query: Detect ZeroLogon (CVE-2020-1472)

In August 2020 Microsoft patched the ZeroLogon vulnerability CVE-2020-1472. In summary, this vulnerability would allow an attacker with a foothold in your network to become a domain admin in a few clicks. The attacker only needs to establish a network connection towards the domain controller. At NVISO we are supporting multiple clients with our MDR … Continue reading Sentinel Query: Detect ZeroLogon (CVE-2020-1472) →