1. A method comprising: deploying an update to a guest virtual machine of a hypervisor during runtime of the guest virtual machine, the deploying comprising: identifying an executing thread of the guest virtual machine, wherein the identifying comprises selecting the thread from a plurality of executing threads of the guest virtual machine, the selecting comprising identifying a respective security identifier of each thread of the plurality of executing threads of the guest virtual machine, and selecting the thread from the plurality of executing threads based on the security identifier of the thread indicating that the thread executes at a heightened privilege level; initially intercepting execution of the guest virtual machine at a first point of execution; redirecting execution of the thread to a first function to open a handle to a file, of the guest virtual machine, to which data of the update is to be written; based on the redirecting the execution of the thread to the first function to open the handle to the file, resuming execution of the guest virtual machine to open the handle to the file, wherein based on the resuming execution of the guest virtual machine to open the handle to the file, the guest invokes execution of the first function to open the handle to the file; providing, by a component executing outside of the guest virtual machine, the data to a buffer component of the guest virtual machine; intercepting execution of the guest virtual machine at a second point of execution; redirecting, by the component executing outside of the guest virtual machine, execution of the thread to a second function to write the data, provided to the buffer component, from the buffer component to the file; and based on the redirecting the execution of the thread to the second function to write the data from the buffer component to the file, resuming execution of the guest virtual machine to write the data, wherein based on resuming execution of the guest virtual machine to write the data, the guest invokes execution of the second function to write the data from the buffer component to the file, and wherein the resuming execution of the guest virtual machine to write the data resumes the guest virtual machine at a point of execution other than the first point of execution at which execution of the guest virtual machine was initially intercepted.