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RansomHub Actors Exploit ZeroLogon Vuln in Recent Ransomware Attacks

CVE-2020-1472 is a privilege escalation flaw that allows an attacker to take over an organization's domain controllers. ....

Symantec Broadcom , Dick Obrien , Adam Neel , Knight Ransomware , Unitedhealth Group , Internet Information Services , Windows Netlogon Remote Protocol , Netlogon Remote Protocol , Auction House ,

FIN7 Cybercrime Group Likely Behind Black Basta Ransomware Campaign

Several artifacts from recent attacks strongly suggest a connection between the two operations, researchers say. ....

Nicole Hoffman , Sentinelone Sentinellabs , Cobalt Group , Trend Micro , Carbanak Group , Black Basta , Cobalt Strike , Active Directory , Windows Print Spooler , Windows Netlogon Remote Protocol , Qakbot Trojan Turned Malware , Digital Shadows ,

Microsoft Issues Second Patch for Netlogon Vulnerability

A first phase patch for the critical vulnerability, tracked as CVE-2020-1472, was issued in August 2020.
The first phase of the patch was intended to address the vulnerability on two fronts: blocking both Windows-based domain members and non-Windows PCs that have been configured to disable signing/encryption as well as making changes to the Netlogon protocol for clients that cannot use the required signing/encryption, says Satnam Narang, staff research engineer at the security firm Tenable.
The second patch completes the patching process for those who did not earlier implement enforcement by automatically turning on the protective measures that were included in the August 2020 patch. The second patch effectively brings all users up to the same level of security. ....

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Microsoft to Launch 'Enforcement Mode' for ...

This move will block vulnerable connections from noncompliant devices, according to a Microsoft Security and Response Center blog post. DC enforcement mode requires both Windows and non-Windows devices to use secure Remote Procedure Call (RPC) with a Netlogon secure channel, unless a business has allowed an account to be exposed by adding an exception for a noncompliant device.
CVE-2020-1472 is a privilege escalation flaw in the Windows Netlogon Remote Protocol (MS-NRPC) with a CVSS score of 10. It could enable an unauthenticated attacker to use MS-NRPC to connect to a domain controller and gain full admin access.
Since it was fixed in August, the Zerologon bug has been seen in active campaigns from Iranian threat group Mercury. The DHS s Cybersecurity and Infrastructure Security Agency (CISA) later issued an emergency directive for the flaw, requiring federal agencies to patch immediately. ....

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Zerologon vulnerability: How federal teams can secure endpoints -- Defense Systems

By Egon Rinderer
Dec 15, 2020
Zerologon is one of the most significant vulnerabilities to surface in a long time. Earlier this year, the Cybersecurity and Infrastructure Security Agency (CISA) released a notice stating the Zerologon vulnerability poses an “unacceptable risk” to the federal civilian executive branch, and required that all federal agencies “immediately apply the Windows Server August 2020 security update” or disconnect from federal networks.
Zerologon allows devices to authenticate to the domain controller and update their password in the Active Directory (AD). Zerologon can maintain relationships between members of domains and the DC, or between many DCs across one or many domains, and replicate the DC database. Microsoft released the software update Netlogon EoP to mitigate a critical vulnerability in the Windows Netlogon Remote Protocol server interface. This was the first update in a phased rollout expected to conclude February 2021. ....

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