SLDT, No Pill

Created the Monday 11 March 2019. Updated 1 year, 2 months ago.

The No Pill technique is a method used by malware to determine whether it is running on a physical machine or a virtual machine. This technique relies on the fact that the Local Descriptor Table (LDT) is assigned to a processor, rather than to an operating system. On a physical machine, the location of the LDT will be zero, whereas on a virtual machine, the location of the LDT will be non-zero.

By checking the location of the LDT, malware can determine whether it is running on a physical or a virtual machine. This information can be used by the malware to adjust its behavior accordingly. For example, the malware may choose to remain dormant on a virtual machine in order to avoid detection.

Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

• https://blog.talosintelligence.com/2009/10/how-does-malware-know-difference.html