Function at 0x404250
Capabilities:
Check if file exists
Create process on windows
Create process suspended
Get common file path
Get file attributes

Disassembly:
sub esp, 0x66c
push ebx
push ebp
push esi
push edi
push 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
mov ebx, eax
lea eax, [esp + 0x578]
push 0x104
push eax
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameA]
lea edi, [esp + 0x578]
or ecx, 0xffffffff
xor eax, eax
lea edx, [esp + 0x64]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
push 0x104
mov eax, ecx
mov esi, edi
mov edi, edx
lea edx, [esp + 0x68]
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
xor eax, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov edi, str.C:Program_FilesLenovo_
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
dec ecx
mov byte [esp + ecx + 0x68], al
lea ecx, [esp + 0x16c]
push ecx
push edx
call dword [sym.imp.KERNEL32.dll_GetShortPathNameA]
mov edi, 0x4334b8
or ecx, 0xffffffff
xor eax, eax
lea edx, [esp + 0x168]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebp, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebp
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebp
lea edx, [esp + 0x64]
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea edi, [esp + 0x168]
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov eax, ecx
mov esi, edi
mov edi, edx
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea ecx, [esp + 0x64]
push ecx
push 0x64
push ebx
call fcn.004041d0
add esp, 0xc
push 0x30c
lea edx, [esp + 0x270]
push edx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
mov edi, str._rundll32.exe
or ecx, 0xffffffff
xor eax, eax
lea edx, [esp + 0x26c]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea eax, [esp + 0x26c]
and ecx, 3
push eax
rep movsb byte es:[edi], byte [esi]
call dword [sym.imp.KERNEL32.dll_GetFileAttributesA]
cmp eax, 0xffffffff
jne 0x4043cd
lea ecx, [esp + 0x26c]
push 0x30c
push ecx
call dword [sym.imp.KERNEL32.dll_GetSystemDirectoryA]
mov edi, str._rundll32.exe
or ecx, 0xffffffff
xor eax, eax
lea edx, [esp + 0x26c]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
or ecx, 0xffffffff
mov edi, 0x4334a4
xor eax, eax
lea edx, [esp + 0x26c]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov ebx, ecx
mov esi, edi
or ecx, 0xffffffff
mov edi, edx
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea edx, [esp + 0x26c]
and ecx, 3
rep movsb byte es:[edi], byte [esi]
or ecx, 0xffffffff
lea edi, [esp + 0x168]
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov ebx, ecx
mov esi, edi
or ecx, 0xffffffff
mov edi, edx
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea edx, [esp + 0x26c]
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov edi, str.__SelfDel_16
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
lea edx, [esp + 0x26c]
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea edi, [esp + 0x578]
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
not ecx
sub edi, ecx
mov esi, edi
mov ebx, ecx
mov edi, edx
or ecx, 0xffffffff
repne scasb al, byte es:[edi]
mov ecx, ebx
dec edi
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, ebx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov ecx, 0x11
lea edi, [esp + 0x20]
rep stosd dword es:[edi], eax
lea eax, [esp + 0x10]
lea ecx, [esp + 0x20]
push eax
mov dword [esp + 0x50], 0x80
push ecx
push 0
push 0
push 0x20
push 0
push 0
lea edx, [esp + 0x288]
push 0
push edx
push 0
call dword [sym.imp.KERNEL32.dll_CreateProcessA]
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x66c
ret