- 1 year ago
How to open a process by name with NtOpenProcess
To open a process by name using NtOpenProcess
in C++, you can follow these steps:
Obtain the function pointer: Get the function pointer to
NtOpenProcess
by usingGetProcAddress
with the handle ofntdll.dll
. Example:cpptypedef NTSTATUS(NTAPI* LPFUN_NtOpenProcess)(PHANDLE ProcessHandle, ACCESS_MASK DesiredAccess, POBJECT_ATTRIBUTES ObjectAttributes, PCLIENT_ID ClientId);
LPFUN_NtOpenProcess NtOpenProcess = (LPFUN_NtOpenProcess)GetProcAddress(GetModuleHandle(L"ntdll.dll"), "NtOpenProcess");
Define the required structures and variables:
cpptypedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING, * PUNICODE_STRING;
typedef struct _OBJECT_ATTRIBUTES {
ULONG Length;
HANDLE RootDirectory;
PUNICODE_STRING ObjectName;
ULONG Attributes;
PVOID SecurityDescriptor;
PVOID SecurityQualityOfService;
} OBJECT_ATTRIBUTES, * POBJECT_ATTRIBUTES;
typedef struct _CLIENT_ID {
HANDLE UniqueProcess;
HANDLE UniqueThread;
} CLIENT_ID, * PCLIENT_ID;
OBJECT_ATTRIBUTES objAttr;
UNICODE_STRING processName;
CLIENT_ID clientId;
HANDLE processHandle;
NTSTATUS status;
Initialize the required structures and variables:
cppRtlInitUnicodeString(&processName, L"your_process_name.exe"); // Replace "your_process_name.exe" with the name of the process you want to open
InitializeObjectAttributes(&objAttr, &processName, OBJ_CASE_INSENSITIVE, NULL, NULL);
clientId.UniqueProcess = NULL;
clientId.UniqueThread = NULL;
Call
NtOpenProcess
to open the process:cppstatus = NtOpenProcess(&processHandle, PROCESS_ALL_ACCESS, &objAttr, &clientId);
if (status == STATUS_SUCCESS) {
// Process opened successfully, you can use the process handle
}
Make sure to handle any errors or exceptions that may occur during the process of opening the process. Additionally, ensure that you have the necessary privileges and permissions to open the target process.
It's important to note that using NtOpenProcess
is not recommended for general application development as it involves low-level interactions with the Windows kernel. Consider using higher-level APIs or libraries provided by the operating system or framework whenever possible.