Breaking Ransomware: Explore ways to find and exploit flaws in a ransomware attack by Jitender Narula & Atul Narula
Author:Jitender Narula & Atul Narula [Narula, Jitender & Narula, Atul]
Language: eng
Format: epub
ISBN: 9789355513625
Publisher: BPB Publications
Published: 2023-06-15T00:00:00+00:00
Figure 8.23: ImportSampleDLL code
The resulting executable (ImportSampleDLL.exe) will list our SampleDLL.dll in Import Directory.
Import Directory is an array of the IMAGE_IMPORT_DESCRIPTOR structure. Each structure is 20 bytes in size and contains information about a DLL imported in our application. For every DLL imported, we will have the IMAGE_IMPORT_DESCRIPTOR structure. Our application is importing functions from four different DLLs, so we have four IMAGE_IMPORT_DESCRIPTOR structures in array. There is no field that indicates the length of an array or the number of IMAGE_IMPORT_DESCRIPTOR structures in an array. Instead, the final IMAGE_IMPORT_DESCRIPTOR structure in an array is filled with zeros.
The structure of the IMAGE_IMPORT_DESCRIPTOR structure is defined in WinNT.h is shown in Figure 8.24:
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