Function at 0x403a90
Capabilities:
Check if file exists
Get file attributes
Query environment variable

Disassembly:
push ebp
lea ebp, [esp - 0xa6c]
sub esp, 0xa6c
push 0xffffffffffffffff
push 0x417160
mov eax, dword fs:[0]
push eax
push ecx
mov eax, dword [0x41e038]
xor eax, ebp
mov dword [ebp + 0xa68], eax
push ebx
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov edi, ecx
mov ebx, dword [ebp + 0xa74]
test ebx, ebx
je 0x403b1e
mov esi, dword [edi]
mov dword [ebp + 0x5c], 0
mov dword [ebp + 0x5c], esi
test esi, esi
je 0x403af0
mov eax, dword [esi]
test eax, eax
je 0x403af0
push eax
call dword [sym.imp.KERNEL32.dll_EnterCriticalSection]
mov dword [ebp - 4], 0
mov eax, dword [edi]
cmp byte [eax + 0x48], 0
jne 0x403b25
mov dword [ebp - 4], 0xffffffff
test esi, esi
je 0x403b1e
mov eax, dword [esi]
test eax, eax
je 0x403b17
push eax
call dword [sym.imp.KERNEL32.dll_LeaveCriticalSection]
mov dword [ebp + 0x5c], 0
xor al, al
jmp 0x403d91
push str.COMCTL32.DLL
mov dword [ebp + 0x3c], 8
mov dword [ebp + 0x40], 0xff
call dword [sym.imp.KERNEL32.dll_LoadLibraryA]
push str.InitCommonControlsEx
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x403b54
lea ecx, [ebp + 0x3c]
push ecx
call eax
push str.User32.dll
call dword [sym.imp.KERNEL32.dll_LoadLibraryA]
push str.MessageBoxW
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
mov dword [ebp - 0x10], eax
test eax, eax
je 0x403c27
mov eax, dword [edi]
cmp dword [eax + 0x74], 0
je 0x403c27
cmp dword [eax + 0x5c], 0
je 0x403c27
add eax, 0x64
lea ecx, [ebp + 0x44]
push eax
call fcn.00402080
mov byte [ebp - 4], 1
lea ecx, [ebp + 0x44]
push 0x4196b0
call fcn.00401f70
push ebx
lea ecx, [ebp + 0x44]
call fcn.00401f70
mov ecx, dword [edi]
add ecx, 0x4c
cmp dword [ecx + 0x14], 8
jb 0x403bbf
mov ecx, dword [ecx]
cmp dword [ebp + 0x58], 8
lea eax, [ebp + 0x44]
push 0
cmovae eax, dword [ebp + 0x44]
push ecx
push eax
push 0
call dword [ebp - 0x10]
mov byte [ebp - 4], 0
mov edx, dword [ebp + 0x58]
cmp edx, 8
jb 0x403c13
mov ecx, dword [ebp + 0x44]
lea edx, [edx*2 + 2]
mov eax, ecx
cmp edx, 0x1000
jb 0x403c09
mov ecx, dword [ecx - 4]
add edx, 0x23
sub eax, ecx
add eax, 0xfffffffc
cmp eax, 0x1f
jbe 0x403c09
call dword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
push edx
push ecx
call fcn.0041560d
add esp, 8
xor eax, eax
mov dword [ebp + 0x54], 0
mov dword [ebp + 0x58], 7
mov word [ebp + 0x44], ax
push 0x208
lea eax, [ebp + 0x860]
push 0
push eax
call sub.VCRUNTIME140.dll_memset
mov eax, dword [edi]
add esp, 0xc
add eax, 0x7c
cmp dword [eax + 0x14], 8
jb 0x403c4a
mov eax, dword [eax]
push eax
lea ecx, [ebp + 0x860]
call fcn.00402420
cmp word [ebp + 0x860], 0
je 0x403d70
mov eax, dword [edi]
cmp byte [eax + 0x94], 0
je 0x403c88
lea ecx, [ebp + 0x860]
call fcn.004099d0
xor eax, eax
mov word [ebp + 0x860], ax
jmp 0x403d70
push 0x800
lea eax, [ebp + 0x60]
push 0
push eax
call sub.VCRUNTIME140.dll_memset
mov ebx, dword [sym.imp.KERNEL32.dll_ExpandEnvironmentStringsW]
lea eax, [ebp + 0x60]
add esp, 0xc
push 0x3fe
push eax
push str._programfiles_Internet_Exploreriexplore.exe
call ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
dec eax
cmp eax, 0x3fd
ja 0x403cce
lea eax, [ebp + 0x60]
push eax
call edi
cmp eax, 0xffffffff
je 0x403cce
test al, 0x10
je 0x403cf9
push 0x3fe
lea eax, [ebp + 0x60]
push eax
push str._programfiles_x86__Internet_Exploreriexplore.exe
call ebx
dec eax
cmp eax, 0x3fd
ja 0x403d70
lea eax, [ebp + 0x60]
push eax
call edi
cmp eax, 0xffffffff
je 0x403d70
test al, 0x10
jne 0x403d70
lea eax, [ebp + 0x60]
mov dword [ebp], 0x3c
xorps xmm0, xmm0
mov dword [ebp + 0x10], eax
lea eax, [ebp + 0x860]
movlpd qword [ebp + 0x20], xmm0
push 0x419780
movlpd qword [ebp + 0x28], xmm0
movlpd qword [ebp + 0x30], xmm0
mov dword [ebp + 4], 0
mov dword [ebp + 8], 0
mov dword [ebp + 0xc], 0
mov dword [ebp + 0x14], eax
mov dword [ebp + 0x18], 0
mov dword [ebp + 0x1c], 1
mov dword [ebp + 0x38], 0
call dword [sym.imp.KERNEL32.dll_LoadLibraryA]
test eax, eax
je 0x403d70
push str.ShellExecuteExW
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x403d70
lea ecx, [ebp]
push ecx
call eax
mov dword [ebp - 4], 0xffffffff
test esi, esi
je 0x403d8f
mov eax, dword [esi]
test eax, eax
je 0x403d88
push eax
call dword [sym.imp.KERNEL32.dll_LeaveCriticalSection]
mov dword [ebp + 0x5c], 0
mov al, 1
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov ecx, dword [ebp + 0xa68]
xor ecx, ebp
call fcn.004155cc
lea esp, [ebp + 0xa6c]
pop ebp
ret 4