Function at 0x402531
Capabilities:
Check os version
Get system information on windows

Disassembly:
push ebp
lea ebp, [esp - 0x68]
sub esp, 0xc4
cmp dword [0x412560], 0
push ebx
push esi
push edi
mov edi, 0x41254c
jne 0x402711
mov esi, 0x9c
push esi
lea eax, [ebp - 0x38]
push 0
push eax
call fcn.00403fa0
add esp, 0xc
push str.win32
mov dword [ebp - 0x38], esi
mov esi, dword [sym.imp.KERNEL32.dll_lstrcpyA]
push edi
call esi
mov ebx, dword [sym.imp.KERNEL32.dll_GetVersionExA]
lea eax, [ebp - 0x38]
push eax
call ebx
test eax, eax
jne 0x402593
lea eax, [ebp - 0x38]
push eax
mov dword [ebp - 0x38], 0x94
call ebx
cmp dword [ebp - 0x28], 2
jne 0x4025f3
cmp dword [ebp - 0x34], 4
jne 0x4025a6
push str.winnt
jmp 0x40261e
cmp dword [ebp - 0x34], 6
jne 0x4025c6
cmp dword [ebp - 0x30], 0
jne 0x40262b
cmp byte [ebp + 0x62], 1
jne 0x4025bf
push str.winvista
jmp 0x40261e
push str.winlong
jmp 0x40261e
cmp dword [ebp - 0x34], 5
jne 0x402621
cmp dword [ebp - 0x30], 0
jne 0x4025d9
push str.win2000
jmp 0x40261e
cmp dword [ebp - 0x30], 1
jne 0x4025e6
push str.winxp
jmp 0x40261e
cmp dword [ebp - 0x30], 2
jne 0x402627
push str.win2003
jmp 0x40261e
cmp dword [ebp - 0x28], 1
jne 0x402621
cmp dword [ebp - 0x34], 4
jne 0x402619
cmp dword [ebp - 0x30], 0xa
jne 0x40260c
push str.win98
jmp 0x40261e
cmp dword [ebp - 0x30], 0x5a
jne 0x402619
push str.winme
jmp 0x40261e
push str.win95
push edi
call esi
cmp dword [ebp - 0x34], 0
jbe 0x402652
cmp dword [ebp - 0x30], 0
jbe 0x402652
push str.win32
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpA]
test eax, eax
jne 0x402652
push dword [ebp - 0x30]
push dword [ebp - 0x34]
push str._d._d
push edi
call dword [sym.imp.USER32.dll_wsprintfA]
add esp, 0x10
lea eax, [ebp - 0x24]
push eax
call fcn.00404dd0
test eax, eax
pop ecx
jbe 0x402676
push 0x412548
lea eax, [ebp - 0x24]
push str.Service_Pack__d
push eax
call fcn.00404e5b
add esp, 0xc
and word [ebp - 0x5c], 0
push str.Unknown
mov ebx, 0x412534
push ebx
call esi
push str.kernel32.dll
call dword [sym.imp.KERNEL32.dll_LoadLibraryA]
test eax, eax
mov dword [ebp + 0x64], eax
je 0x4026b2
push str.GetNativeSystemInfo
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x4026b2
lea ecx, [ebp - 0x5c]
push ecx
call eax
jmp 0x4026bc
lea eax, [ebp - 0x5c]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
cmp dword [ebp + 0x64], 0
je 0x4026cb
push dword [ebp + 0x64]
call dword [sym.imp.KERNEL32.dll_FreeLibrary]
movzx eax, word [ebp - 0x5c]
test eax, eax
je 0x4026fd
cmp eax, 6
je 0x4026f6
cmp eax, 9
je 0x4026ef
push eax
push 0x40ea84
push ebx
call dword [sym.imp.USER32.dll_wsprintfA]
add esp, 0xc
jmp 0x402705
push str.amd64
jmp 0x402702
push str.ia64
jmp 0x402702
push str.i586
push ebx
call esi
mov dword [0x412560], 1
jmp 0x402716
mov ebx, 0x412534
mov eax, dword [0x412548]
test eax, eax
mov esi, 0x40e2cc
jbe 0x402739
push eax
push edi
push str._s_sp_d
push dword [ebp + 0x70]
call dword [sym.imp.USER32.dll_wsprintfA]
add esp, 0x10
jmp 0x402747
push edi
push esi
push dword [ebp + 0x70]
call dword [sym.imp.USER32.dll_wsprintfA]
add esp, 0xc
cmp dword [ebp + 0x78], 0
je 0x40275b
push ebx
push esi
push dword [ebp + 0x78]
call dword [sym.imp.USER32.dll_wsprintfA]
add esp, 0xc
pop edi
xor eax, eax
pop esi
inc eax
pop ebx
add ebp, 0x68
leave
ret