Function at 0x40ff01
Capabilities:
Check if file exists
Get disk size

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x4c
push ebx
push esi
mov esi, dword [ebp + 0xc]
push edi
xor ebx, ebx
xor eax, eax
cmp esi, ebx
mov dword [ebp - 0x34], ebx
lea edi, [ebp - 0x2c]
stosd dword es:[edi], eax
stosd dword es:[edi], eax
jne 0x40ff66
push 0xc0000000
push dword [ebp + 8]
call dword [0x4a5ed8]
mov edi, eax
cmp edi, 0xffffffff
jne 0x410076
push 0x80000000
push dword [ebp + 8]
call dword [0x4a5ed8]
mov edi, eax
cmp edi, 0xffffffff
jne 0x410076
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp eax, 2
jne 0x410063
xor eax, eax
inc eax
jmp 0x41013c
mov edi, dword [sym.imp.KERNEL32.dll_lstrlenW]
push esi
call edi
cmp eax, 2
jne 0x40ff80
xor eax, eax
cmp word [esi + 2], 0x3a
sete al
jmp 0x40ffa1
push esi
call edi
cmp eax, 3
jne 0x40ff9f
lea eax, [esi + 2]
push 0x490850
push eax
call fcn.0047aa0c
neg eax
pop ecx
sbb eax, eax
pop ecx
inc eax
jmp 0x40ffa1
xor eax, eax
cmp eax, ebx
je 0x40fffe
mov eax, dword [ebp + 0xc]
mov ax, word [eax]
mov esi, str.._:
lea edi, [ebp - 0x24]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
push ebx
push 0x20000000
movsd dword es:[edi], dword [esi]
push 3
push ebx
movsw word es:[edi], word [esi]
mov esi, dword [sym.imp.KERNEL32.dll_CreateFileW]
push 3
mov word [ebp - 0x1c], ax
push 0xc0000000
lea eax, [ebp - 0x24]
push eax
call esi
mov edi, eax
cmp edi, 0xffffffff
jne 0x410076
push ebx
push 0x20000000
push 3
push ebx
push 3
push 0x80000000
lea eax, [ebp - 0x24]
push eax
call esi
jmp 0x40ff44
push 0xc0000000
push esi
call dword [0x4a5edc]
mov edi, eax
cmp edi, 0xffffffff
jne 0x410076
push 0x80000000
push esi
call dword [0x4a5edc]
mov edi, eax
cmp edi, 0xffffffff
jne 0x410076
call dword [sym.imp.KERNEL32.dll_GetLastError]
dec eax
je 0x41005f
sub eax, 0x56
je 0x41005f
sub eax, 0x3a
je 0x41004c
sub eax, 0x7a
je 0x41004c
sub eax, 0x101b
je 0x41004c
push esi
call fcn.0040f233
pop ecx
jmp 0x41005f
push esi
push str.Not_a_mount_point:__1_ws__n
push 0x4a4840
call fcn.0040f1d7
add esp, 0xc
push 9
jmp 0x410070
push str.Error_opening_device:
call fcn.0040f233
pop ecx
push 2
pop eax
jmp 0x41013c
mov eax, dword [ebp + 0x10]
mov esi, dword [sym.imp.KERNEL32.dll_DeviceIoControl]
mov dword [ebp - 0x2c], eax
mov eax, dword [ebp + 0x14]
push ebx
mov dword [ebp - 0x28], eax
lea eax, [ebp - 4]
push eax
push ebx
push ebx
push 0x10
lea eax, [ebp - 0x34]
push eax
push 0x7c0d0
push edi
mov dword [ebp - 0x34], 1
call esi
test eax, eax
jne 0x4100b6
push dword [ebp + 0xc]
call fcn.0040f233
pop ecx
push 3
pop ebx
jmp 0x410133
push ebx
lea eax, [ebp - 4]
push eax
push 8
lea eax, [ebp - 0xc]
push eax
push ebx
push ebx
push 0x7405c
push edi
call esi
test eax, eax
je 0x4100e8
push ebx
lea eax, [ebp - 4]
push eax
push 0x18
lea eax, [ebp - 0x4c]
push eax
push ebx
push ebx
push 0x70000
push edi
call esi
test eax, eax
jne 0x410109
push dword [ebp + 0xc]
call fcn.0040f233
push dword [ebp + 0xc]
push str._1_ws_:_Is_that_drive_really_an_ImDisk_drive_
push 0x4a4840
call fcn.0040f1d7
add esp, 0x10
push 2
jmp 0x4100b3
push ebx
push dword [ebp - 0x38]
push dword [ebp - 8]
push dword [ebp - 0xc]
call fcn.00479d50
push ebx
mov dword [ebp - 0x14], eax
lea eax, [ebp - 4]
push eax
push ebx
push ebx
push 8
lea eax, [ebp - 0x14]
push eax
push 0x900f0
push edi
mov dword [ebp - 0x10], edx
call esi
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret