Function at 0x40b380
Capabilities:
Check if file exists
Get file attributes
Query environment variable

Disassembly:
push ebp
lea ebp, [esp - 0x283c]
mov eax, 0x283c
call fcn.004271c0
push 0xffffffffffffffff
push 0x429118
mov eax, dword fs:[0]
push eax
sub esp, 0x24
mov eax, dword [0x436038]
xor eax, ebp
mov dword [ebp + 0x2838], eax
push ebx
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov esi, ecx
push 0x2000
lea eax, [ebp + 0x630]
mov dword [ebp - 0x10], 0
push 0
push eax
call fcn.00417c20
add esp, 0xc
mov eax, 0x22
mov word [ebp + 0x630], ax
test esi, esi
je 0x40b5f9
mov edi, dword [sym.imp.KERNEL32.dll_lstrlenW]
push esi
call edi
cmp eax, 1
jl 0x40b5f9
push esi
call edi
cmp eax, 0xffa
jge 0x40b5f9
push esi
mov esi, dword [sym.imp.KERNEL32.dll_lstrcatW]
lea eax, [ebp + 0x630]
push eax
call esi
push 0x431680
lea eax, [ebp + 0x630]
push eax
call esi
push 0xb
xor eax, eax
mov dword [ebp - 0x18], 0
mov dword [ebp - 0x14], 0
lea ecx, [ebp - 0x28]
push str.Shell32.dll
mov dword [ebp - 0x18], 0
mov dword [ebp - 0x14], 7
mov word [ebp - 0x28], ax
call fcn.004032a0
mov dword [ebp - 4], 0
lea eax, [ebp - 0x28]
push eax
call fcn.00410560
mov ecx, eax
call fcn.00410620
mov esi, eax
mov dword [ebp - 4], 0xffffffff
mov edx, dword [ebp - 0x14]
cmp edx, 8
jb 0x40b4b9
mov ecx, dword [ebp - 0x28]
lea edx, [edx*2 + 2]
mov eax, ecx
cmp edx, 0x1000
jb 0x40b4af
mov ecx, dword [ecx - 4]
add edx, 0x23
sub eax, ecx
add eax, 0xfffffffc
cmp eax, 0x1f
ja 0x40b61e
push edx
push ecx
call fcn.00416d7e
add esp, 8
xor eax, eax
mov dword [ebp - 0x18], 0
mov dword [ebp - 0x14], 7
mov word [ebp - 0x28], ax
test esi, esi
je 0x40b5f9
push str.ShellExecuteW
push esi
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
mov ebx, eax
test ebx, ebx
je 0x40b5f9
lea ecx, [ebp]
call fcn.0040ad60
xor edi, edi
lea esi, [ebp]
cmp word [esi], 0
je 0x40b518
push 1
push 0
lea eax, [ebp + 0x630]
push eax
push esi
push str.open
push 0
call ebx
cmp eax, 0x20
ja 0x40b526
inc edi
add esi, 0x210
cmp edi, 3
jl 0x40b4f8
jmp 0x40b54b
imul eax, edi, 0x210
cmp dword [ebp + eax + 0x208], 0
mov eax, dword [ebp + eax + 0x20c]
jne 0x40b540
add eax, 0x10
mov dword [ebp - 0x10], eax
test eax, eax
jne 0x40b5fb
push 1
push 0
push 0
lea eax, [ebp + 0x630]
push eax
push str.open
push 0
call ebx
cmp eax, 0x20
jbe 0x40b570
mov eax, 0x10
jmp 0x40b5fb
mov edi, dword [sym.imp.KERNEL32.dll_ExpandEnvironmentStringsW]
xor esi, esi
mov dword [ebp - 0x30], str._programfiles_x86__Internet_Exploreriexplore.exe
mov dword [ebp - 0x2c], str._programfiles_Internet_Exploreriexplore.exe
nop word [eax + eax]
push 0x208
lea eax, [ebp + 0x2630]
push 0
push eax
call fcn.00417c20
add esp, 0xc
lea eax, [ebp + 0x2630]
push 0x103
push eax
push dword [ebp + esi*4 - 0x30]
call edi
lea eax, [ebp + 0x2630]
push eax
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
je 0x40b5ee
push 1
push 0
lea eax, [ebp + 0x630]
push eax
lea eax, [ebp + 0x2630]
push eax
push str.open
push 0
call ebx
cmp eax, 0x20
ja 0x40b566
inc esi
cmp esi, 2
jb 0x40b590
mov eax, dword [ebp - 0x10]
jmp 0x40b5fb
xor eax, eax
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov ecx, dword [ebp + 0x2838]
xor ecx, ebp
call fcn.00416858
lea esp, [ebp + 0x283c]
pop ebp
ret
call fcn.0041a2ea
int3