Function at 0x140043710
Capabilities:
Check if file exists
Create a process with modified i/o handles and window
Create process on windows
Create process suspended
Get file attributes

Disassembly:
mov qword [rsp + 8], rcx
sub rsp, 0x848
mov qword [rsp + 0x828], 0xfffffffffffffffe
mov rax, qword [0x1402aa808]
xor rax, rsp
mov qword [rsp + 0x830], rax
lea rcx, [rsp + 0x4c0]
call fcn.140065c10
nop
mov dword [rsp + 0x4b0], 0
lea rcx, [rsp + 0x68]
call fcn.140001cf0
nop
mov dword [rsp + 0x60], 0
lea rdx, str.CIstDrvApp::Win64PathThrough_Win64PathThrough___________________________IN._n
mov ecx, 5
call fcn.14001c160
cmp dword [rsp + 0x574], 0
jne 0x140043786
jmp 0x1400439d9
mov qword [rsp + 0x40], 0
mov qword [rsp + 0x38], 0
mov qword [rsp + 0x30], 0x101
lea rax, [rsp + 0x70]
mov qword [rsp + 0x28], rax
mov qword [rsp + 0x20], 0x105
lea r9, [rsp + 0x2a0]
mov r8d, 4
lea rdx, [rsp + 0x58]
mov rax, qword [rsp + 0x850]
mov rcx, qword [rax + 0xd0]
call fcn.1401ab004
lea rdx, [rsp + 0x58]
lea rcx, [rsp + 0x68]
call fcn.1400185f0
lea rdx, [rsp + 0x2a0]
lea rcx, [rsp + 0x68]
call fcn.14000fd10
lea rdx, [rsp + 0x70]
lea rcx, [rsp + 0x68]
call fcn.14000fd10
cmp dword [rsp + 0x584], 0
je 0x140043828
lea rdx, str..x64.EXE
lea rcx, [rsp + 0x68]
call fcn.14000fd10
jmp 0x140043843
cmp dword [rsp + 0x588], 0
je 0x140043843
lea rdx, str..IA64.EXE
lea rcx, [rsp + 0x68]
call fcn.14000fd10
mov r8, qword [rsp + 0x68]
lea rdx, str.CIstDrvApp::Win64PathThrough_strWin64Exe____1_s___n
mov ecx, 4
call fcn.14001c160
xor edx, edx
lea rcx, [rsp + 0x68]
call fcn.140001da0
mov rcx, rax
call qword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
je 0x1400439d9
lea rcx, [rsp + 0x818]
call fcn.140001cf0
nop
lea rdx, [rsp + 0x68]
lea rcx, [rsp + 0x818]
call fcn.140001d70
lea rdx, [0x14020393c]
lea rcx, [rsp + 0x818]
call fcn.14000fd10
call fcn.140018340
mov rdx, qword [rax + 0x90]
lea rcx, [rsp + 0x818]
call fcn.14000fd10
mov r8, qword [rsp + 0x818]
lea rdx, str.CIstDrvApp::Win64PathThrough_strCmdLine____1_s___n
mov ecx, 4
call fcn.14001c160
mov r8d, 0x68
xor edx, edx
lea rcx, [rsp + 0x7a0]
call fcn.1401ac6a0
mov dword [rsp + 0x7a0], 0x68
mov edx, 1
lea rcx, [rsp + 0x818]
call fcn.140001da0
mov qword [rsp + 0x810], rax
lea rax, [rsp + 0x280]
mov qword [rsp + 0x48], rax
lea rax, [rsp + 0x7a0]
mov qword [rsp + 0x40], rax
mov qword [rsp + 0x38], 0
mov qword [rsp + 0x30], 0
mov dword [rsp + 0x28], 0x20
mov dword [rsp + 0x20], 0
xor r9d, r9d
xor r8d, r8d
mov rdx, qword [rsp + 0x810]
xor ecx, ecx
call qword [sym.imp.KERNEL32.dll_CreateProcessW]
test eax, eax
je 0x1400439af
mov rcx, qword [rsp + 0x288]
call qword [sym.imp.KERNEL32.dll_CloseHandle]
mov edx, 0xffffffff
mov rcx, qword [rsp + 0x280]
call qword [sym.imp.KERNEL32.dll_WaitForSingleObject]
lea rdx, [rsp + 0x60]
mov rcx, qword [rsp + 0x280]
call qword [sym.imp.KERNEL32.dll_GetExitCodeProcess]
mov rcx, qword [rsp + 0x280]
call qword [sym.imp.KERNEL32.dll_CloseHandle]
mov rax, qword [rsp + 0x850]
mov ecx, dword [rsp + 0x60]
mov dword [rax + 0x7a8], ecx
mov dword [rsp + 0x4b0], 1
lea rcx, [rsp + 0x818]
call fcn.140001d50
lea rdx, str.CIstDrvApp::Win64PathThrough_Win64PathThrough___________________________OUT._n
mov ecx, 5
call fcn.14001c160
mov eax, dword [rsp + 0x4b0]
mov dword [rsp + 0x820], eax
lea rcx, [rsp + 0x68]
call fcn.140001d50
nop
lea rcx, [rsp + 0x4c0]
call fcn.140066f20
mov eax, dword [rsp + 0x820]
mov rcx, qword [rsp + 0x830]
xor rcx, rsp
call fcn.1401ab2d0
add rsp, 0x848
ret