Rewterz Threat Advisory –CVE-2022-30190: Follina MSDT Zero Day – Active IOCs

Severity

High

Analysis Summary

A zero-day vulnerability in Microsoft Office is being actively exploited in the wild, and while there isn’t currently a patch, the software giant has published workarounds to thwart attacks. CVE-2022-30190, also known as “Follina,” is a remote code execution (RCE) vulnerability affecting the Microsoft Support Diagnostic Tool (MSDT) in Windows. 

CVE-2022-30190

Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Support Diagnostic Tool (MSDT) component. By persuading a victim to open specially-crafted content, an attacker could exploit this vulnerability to execute arbitrary code on the system. Microsoft Support Diagnostics Tool (MSDT) is used by support professionals for troubleshooting.

According to the researcher, maldoc retrieves an HTML file from a server using Word’s template feature. The malicious payload is then obtained via the “ms-msdt: //” URI scheme. 

The attackers who successfully exploit this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, delete data, or create new accounts in the context allowed by the user’s permissions.
Here are the workaround guidance shared by Microsoft:

Impact

• Code Execution
• Privilege Escalation

Indicators Of Compromise

CVE

• CVE-2022-30190

MD5

• e7015438268464cedad98b1544d643ad
• 7a91b01a037ccbfe6589161643d0a65a
• ea483ab89d8b9baf00b953f0636e0520
• 242d2fa02535599dae793e731b6db5a2
• d1fe26b84043ac11fa5ddb90906e6d56
• 4e7fc2acd66d87c7a439b49196899001
• 000c10fef5a643bd96da7cf3155e6a38

SHA-256

• d20120cc046cef3c3f0292c6cbc406fcf2a714aa8e048c9188f1184e4bb16c93
• f17f5c8eac3a18c961705a61385e1d2894cc8f22fb33aa3e076a40b826384c60
• 5385a798d136365b644199359dc2662de3b0d6c5adc09e4cf9cada074e8a9338
• ca7e9c65fd2cec62110b50581529198c43b7982820a38c912baa81d0294b8126
• 8e986c906d0c6213f80d0224833913fa14bc4c15c047766a62f6329bfc0639bd
• 4f643bf57abe70e3c4ed64f05167da5d6c35f2dac1d7fda78523ab231f903575
• 248296cf75065c7db51a793816d388ad589127c40fddef276e622a160727ca29

SHA-1

• 03ef0e06d678a07f0413d95f0deb8968190e4f6b
• 53658a5b5bc577d601e23ae77a34cb44dcba1f27
• b0b952334f0d0195b06faed532170263f7fad6c2
• 0646ef9e20628c47c2140c0fc4b51ce3a7ad4c30
• b11edf05b9f5bef2c98a46af5c8646fbf74e4a9f
• 7ed97610cdee3c69be2961543ce619485b680572
• 9253df019b02e409ac86f9241781b4d1890d3489

Affected Vendors

Microsoft

Affected Products

• Microsoft Windows 7 SP1 x32
• Microsoft Windows 7 SP1 x64
• Microsoft Windows Server 2008 R2 X64
• Microsoft Windows Server 2012
• Microsoft Windows 8.1 x32
• Microsoft Windows 8.1 x64
• Microsoft Windows RT 8.1
• Microsoft Windows Server 2012 R2
• Microsoft Windows 10 x32
• Microsoft Windows 10 x64
• Microsoft Windows Server 2016
• Microsoft Windows Server 2019
• Microsoft Windows 10 1809 for x64-based Systems
• Microsoft Windows 10 1809 for 32-bit Systems
• Microsoft Windows 10 1809 for ARM64-based Systems
• Microsoft Windows 10 1607 for 32-bit Systems
• Microsoft Windows 10 1607 for x64-based Systems
• Microsoft Windows 10 20H2 for 32-bit Systems
• Microsoft Windows 10 20H2 for ARM64-based Systems
• Microsoft Windows 10 20H2 for x64-based Systems
• Microsoft Windows Server (Server Core installation) 2019
• Microsoft Windows Server (Server Core installation) 20H2
• Microsoft Windows Server (Server Core installation) 2016
• Microsoft Windows Server (Server Core installation) 2012 R2
• Microsoft Windows Server (Server Core installation) 2012
• Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2
• Microsoft Windows Server for X64-based systems 2008 R2 SP1
• Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
• Microsoft Windows Server for 32-bit systems 2008 SP2
• Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2 SP1
• Microsoft Windows 10 21H1 for 32-bit Systems
• Microsoft Windows 10 21H1 for ARM64-based Systems
• Microsoft Windows 10 21H1 for x64-based Systems
• Microsoft Windows Server 2022
• Microsoft Windows Server (Server Core installation) 2022
• Microsoft Windows Server for X64-based systems 2008 SP2
• Microsoft Windows 11 x64
• Microsoft Windows 11 ARM64
• Microsoft Windows 10 21H2 for 32-bit Systems
• Microsoft Windows 10 21H2 for ARM64-based Systems
• Microsoft Windows 10 21H2 for x64-based Systems
• Microsoft Windows Server 2022 Azure Edition Core Hotpatch

Remediation

• Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.
• Customers using Microsoft Defender Antivirus should turn-on cloud-delivered protection and automatic sample submission.
• Customers that use Microsoft Defender for Endpoint can set the “BlockOfficeCreateProcessRule” attack surface reduction rule, which prevents Office apps from generating child processes.