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Microsoft Dark Ban Clone Windows Repeat Original SID 🚨

Microsoft has become increasingly strict with Windows internal systems, especially the SID or Security Identifier, which is like the ID card of each machine in a Windows system. It is used to confirm the identity of the time to share files, servers or Remote Desktop.

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For the average user who installs Windows one by one, the system automatically creates a new SID so it can hardly feel any change, but for large organizations with hundreds or thousands of computers, this is a direct impact.

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In most organizations, IT teams usually do not install one Windows at a time, but instead set up one prototype machine, install a program and set everything ready, and then clone or create images on other machines to save time and reduce workload.

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This method is common in IT, but cloned machines have all the same SIDs, which historically may not have made them unusable, but since Windows 11 versions 24H2, 25H2, and Windows Server 2025 onwards, Microsoft will no longer allow duplicate SIDs to authenticate via NTLM or Kerberos.

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As a result, a machine that is cloned without resetting the SID will not share files. Remote Desktop cannot be used. It cannot be logged in, even if the code is correct or uploaded. Error that access denied because the system does not see the identity clearly. The main reason is that Microsoft wants to upgrade security, close a vulnerability that may allow cloned machines to impersonate real machines in the network.

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All IT teams need to do is use the Sysprep tool before Clone every time to reset their old data and create a new SID without duplicating it. This is actually something that IT teams should do in the first place, even if Microsoft doesn't force it. If the SID is duplicated, the Audit System or Audit will definitely not pass. It is called using Sysprep before Clone is the basis that all IT teams should habitually do.

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Source: neowin

# IT News # Includes IT matters # Cough to know # IT

2025/11/11 Edited to

... Read moreการจัดการ SID หรือ Security Identifier เป็นหัวใจสำคัญของระบบ Windows เพื่อยืนยันตัวตนของเครื่องคอมพิวเตอร์ในเครือข่าย โดยเฉพาะองค์กรขนาดใหญ่ที่มีการใช้งานเครื่องจำนวนมาก การโคลนเครื่องโดยใช้ SID เดิมซ้ำกัน อาจทำให้เกิดปัญหาการยืนยันตัวตนและการเข้าถึงทรัพยากรในเครือข่าย เช่น การเข้าแชร์ไฟล์หรือใช้งาน Remote Desktop ไม่ได้ Microsoft ได้เริ่มเข้มงวดมากขึ้น โดยใน Windows 11 เวอร์ชัน 24H2, 25H2 และ Windows Server 2025 มีการป้องกันไม่ให้เครื่องที่มี SID ซ้ำกันสามารถยืนยันตัวตนผ่าน NTLM หรือ Kerberos ได้อีกต่อไป ซึ่งใช้เป็นกลไกหนึ่งในการเพิ่มความปลอดภัย ป้องกันเครื่องโคลนปลอมแปลงแอบอ้างตัวตนในระบบเครือข่าย เครื่องมือ Sysprep จึงกลายเป็นสิ่งสำคัญที่ทีมไอทีต้องใช้อย่างเคร่งครัดก่อนการโคลนเครื่องทุกครั้ง Sysprep จะช่วยรีเซ็ตข้อมูลของเครื่องต้นแบบ และสร้าง SID ใหม่อย่างถูกต้อง ทำให้แต่ละเครื่องมี ID เฉพาะตัว ไม่ซ้ำกับเครื่องอื่นในระบบ ซึ่งจะทำให้กระบวนการตรวจสอบและ Audit ผ่านได้ไม่มีปัญหา สำหรับองค์กรที่ไม่รีเซ็ต SID ก่อนโคลน อาจเผชิญกับปัญหาการล็อกอินผิดพลาด ขึ้นข้อความ access denied หรือไม่สามารถเข้าถึงทรัพยากรเครือข่ายได้ ถึงแม้ว่าจะใส่รหัสถูกต้องก็ตาม ทั้งนี้ยังช่วยป้องกันช่องโหว่ที่อาจถูกใช้สำหรับโจมตีหรือปลอมตัวเครื่องในระบบเครือข่ายได้ โดยสรุป การทำความเข้าใจและจัดการ SID อย่างถูกวิธีคือหนึ่งในพื้นฐานความปลอดภัยที่ทีมไอทีและองค์กรควรให้ความสำคัญ เพื่อรักษาความมั่นคงของระบบในยุคที่ Microsoft เริ่มเข้มงวดกับมาตรฐานความปลอดภัยมากขึ้นเรื่อยๆ นอกจากนี้ ผู้ดูแลระบบยังควรอัปเดตความรู้และติดตามเครื่องมือจาก Microsoft อย่างสม่ำเสมอเพื่อรองรับข้อกำหนดและแนวทางปฏิบัติใหม่ ๆ ที่จะเข้ามาในอนาคต สร้างความมั่นใจได้ว่าโครงสร้างระบบ IT ได้รับการบริหารจัดการอย่างปลอดภัยและมีประสิทธิภาพสูงสุด

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