Function at 0x421940
Capabilities:
Check os version
Get system information on windows

Disassembly:
push ebp
mov ebp, esp
and esp, 0xfffffff8
sub esp, 0x158
mov eax, dword [0x47ca30]
xor eax, esp
mov dword [esp + 0x154], eax
push esi
mov esi, ecx
mov dword [esp + 8], 0
push edi
mov dword [esi], 0
mov dword [esi + 0x1c], 3
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push 0x40df34
push 0x40df18
mov edi, eax
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x4219ba
lea ecx, [esp + 0x10]
mov dword [esp + 0x10], 0
push ecx
push edi
call eax
test eax, eax
jne 0x4219b1
mov eax, 2
jmp 0x4219ba
xor eax, eax
cmp dword [esp + 0x10], eax
setne al
mov dword [esi + 0x28], eax
lea eax, [esp + 0x3c]
push pe_nt_image_headers32
push 0
mov dword [esi + 0x40], 0xf
mov dword [esi + 0x3c], 0
mov byte [esi + 0x2c], 0
push eax
mov dword [esp + 0x44], 0x11c
call fcn.00438c15
add esp, 0xc
lea eax, [esp + 0x38]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
mov edx, dword [esp + 0x3c]
mov ecx, dword [esp + 0x40]
mov eax, dword [esp + 0x44]
mov dword [esi + 4], edx
mov dword [esi + 8], ecx
mov dword [esi + 0xc], eax
cmp edx, 5
jne 0x421a21
test ecx, ecx
jle 0x421a55
xor eax, eax
cmp ecx, 1
setne al
inc eax
mov dword [esi], eax
jmp 0x421a55
cmp edx, 6
jne 0x421a4d
sub ecx, 0
je 0x421a45
dec ecx
je 0x421a3d
dec ecx
je 0x421a35
mov dword [esi], edx
jmp 0x421a55
mov dword [esi], 5
jmp 0x421a55
mov dword [esi], 4
jmp 0x421a55
mov dword [esi], 3
jmp 0x421a55
jle 0x421a55
mov dword [esi], 7
movzx eax, word [esp + 0x14c]
xorps xmm0, xmm0
mov dword [esi + 0x14], eax
movzx eax, word [esp + 0x14e]
mov dword [esi + 0x18], eax
lea eax, [esp + 0x14]
push eax
mov dword [esp + 0x18], 0
movdqu xmmword [esp + 0x1c], xmm0
movdqu xmmword [esp + 0x2c], xmm0
call dword [sym.imp.KERNEL32.dll_GetNativeSystemInfo]
mov ecx, dword [esp + 0x14]
movzx eax, cx
test eax, eax
je 0x421ab4
cmp eax, 6
je 0x421aab
cmp eax, 9
jne 0x421abb
mov dword [esi + 0x1c], 1
jmp 0x421abb
mov dword [esi + 0x1c], 2
jmp 0x421abb
mov dword [esi + 0x1c], 0
mov eax, dword [esp + 0x28]
mov dword [esi + 0x20], eax
mov eax, dword [esp + 0x30]
mov dword [esi + 0x24], eax
mov eax, dword [esp + 0x3c]
cmp eax, 6
jne 0x421b56
push 0x40df08
push 0x40df18
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
lea ecx, [esp + 0xc]
push ecx
push 0
push 0
push dword [esp + 0x4c]
push dword [esp + 0x4c]
call eax
mov ecx, dword [esp + 0xc]
dec ecx
cmp ecx, 0x2f
ja case.0x421b15.2
movzx ecx, byte [ecx + 0x421bf4]
jmp dword [ecx*4 + 0x421be8]
mov dword [esi + 0x10], 2
mov eax, esi
pop edi
pop esi
mov ecx, dword [esp + 0x154]
xor ecx, esp
call fcn.0045ed71
mov esp, ebp
pop ebp
ret
mov dword [esi + 0x10], 1
mov eax, esi
pop edi
pop esi
mov ecx, dword [esp + 0x154]
xor ecx, esp
call fcn.0045ed71
mov esp, ebp
pop ebp
ret
cmp eax, 5
jne case.0x421b15.2
mov eax, dword [esp + 0x40]
cmp eax, 2
jne 0x421b9c
cmp byte [esp + 0x152], 1
jne 0x421b74
cmp cx, 9
je case.0x421b15.1
mov eax, dword [esp + 0x150]
shr eax, 0xe
not eax
and eax, 2
mov dword [esi + 0x10], eax
mov eax, esi
pop edi
pop esi
mov ecx, dword [esp + 0x154]
xor ecx, esp
call fcn.0045ed71
mov esp, ebp
pop ebp
ret
cmp eax, 1
jne case.0x421b15.2
mov eax, dword [esp + 0x150]
shr eax, 9
not eax
and eax, 1
mov dword [esi + 0x10], eax
mov eax, esi
pop edi
pop esi
mov ecx, dword [esp + 0x154]
xor ecx, esp
call fcn.0045ed71
mov esp, ebp
pop ebp
ret
mov ecx, dword [esp + 0x15c]
mov eax, esi
pop edi
mov dword [esi + 0x10], 0
pop esi
xor ecx, esp
call fcn.0045ed71
mov esp, ebp
pop ebp
ret