Function at 0x425e50
Capabilities:
Check os version
Get system information on windows

Disassembly:
push 0xffffffffffffffff
push 0x516b3d
mov eax, dword fs:[0]
push eax
sub esp, 0x1dc
mov eax, dword [0x568e30]
xor eax, esp
mov dword [esp + 0x1d8], eax
mov eax, dword [0x568e30]
xor eax, esp
push eax
lea eax, [esp + 0x1e0]
mov dword fs:[0], eax
lea eax, [esp + 0xbc]
mov dword [esp + 4], 0
push eax
mov dword [esp + 0xc], esi
mov dword [esp + 0xc0], 0x11c
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
je case.default.0x425fde
lea ecx, [esp + 0x98]
push ecx
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov eax, dword [esp + 0xc0]
add eax, 0xfffffffc
cmp eax, 6
ja case.default.0x425fde
jmp dword [eax*4 + 0x4261a4]
mov eax, dword [esp + 0xc4]
test eax, eax
je 0x425f17
cmp eax, 0xa
je 0x425f06
cmp eax, 0x5a
jne case.default.0x425fde
push str.Windows_Me
mov ecx, esi
call fcn.00403290
jmp 0x42617b
push str.Windows_98
mov ecx, esi
call fcn.00403290
jmp 0x42617b
mov eax, dword [esp + 0xcc]
cmp eax, 2
jne 0x425f34
push str.Windows_NT_4.0
mov ecx, esi
call fcn.00403290
jmp 0x42617b
cmp eax, 1
jne case.default.0x425fde
push str.Windows_95
mov ecx, esi
call fcn.00403290
jmp 0x42617b
mov eax, dword [esp + 0xc4]
sub eax, 0
je 0x425fbd
sub eax, 1
je 0x425fac
sub eax, 1
jne case.default.0x425fde
mov al, byte [esp + 0x1d6]
cmp al, 1
jne 0x425f93
cmp word [esp + 0x98], 9
jne case.default.0x425fde
push str.Windows_XP_Professional_x64_Edition
mov ecx, esi
call fcn.00403290
jmp 0x42617b
cmp al, 3
jne case.default.0x425fde
push str.Windows_Server_2003
mov ecx, esi
call fcn.00403290
jmp 0x42617b
push str.Windows_XP
mov ecx, esi
call fcn.00403290
jmp 0x42617b
push str.Windows_2000
mov ecx, esi
call fcn.00403290
jmp 0x42617b
mov eax, dword [esp + 0xc4]
cmp eax, 3
ja case.default.0x425fde
jmp dword [eax*4 + 0x4261c0]
cmp byte [esp + 0x1d6], 1
mov ecx, esi
jne 0x426000
push str.Windows_Vista
call fcn.00403290
jmp 0x42617b
push str.Windows_Server_2008
call fcn.00403290
jmp 0x42617b
cmp byte [esp + 0x1d6], 1
mov ecx, esi
jne 0x42602a
push str.Windows_7
call fcn.00403290
jmp 0x42617b
push str.Windows_Server_2008_R2
call fcn.00403290
jmp 0x42617b
cmp byte [esp + 0x1d6], 1
mov ecx, esi
jne 0x426054
push str.Windows_8
call fcn.00403290
jmp 0x42617b
push str.Windows_Server_2012
call fcn.00403290
jmp 0x42617b
cmp byte [esp + 0x1d6], 1
mov ecx, esi
jne 0x42607e
push str.Windows_8.1
call fcn.00403290
jmp 0x42617b
push str.Windows_Server_2012_R2
call fcn.00403290
jmp 0x42617b
cmp dword [esp + 0xc4], 0
jne case.default.0x425fde
cmp byte [esp + 0x1d6], 1
mov ecx, esi
jne 0x4260b2
push str.Windows_10
call fcn.00403290
jmp 0x42617b
push str.Windows_Server_2016_Techical_Preview
call fcn.00403290
jmp 0x42617b
lea edx, [esp + 0xc]
push edx
call fcn.00426960
lea eax, [esp + 0x14]
push str.Windows_NT
push eax
mov dword [esp + 0x1f0], 1
call fcn.00429590
add esp, 8
push 0x53bb24
push ecx
mov ecx, dword [esp + 0xc8]
push ecx
lea edx, [esp + 0x20]
push edx
call fcn.004267e0
add esp, 4
push eax
call fcn.00429590
mov eax, dword [esp + 0xcc]
add esp, 8
push 0x53bb24
push ecx
push eax
lea ecx, [esp + 0x20]
push ecx
call fcn.004267e0
add esp, 4
push eax
call fcn.00429590
mov edx, dword [esp + 0xd0]
add esp, 8
push edx
lea eax, [esp + 0x18]
push eax
call fcn.004267e0
mov ecx, esi
lea eax, [esp + 0xc]
call fcn.00426a80
lea ecx, [esp + 0x60]
mov dword [esp + 4], 1
mov byte [esp + 0x1e8], 0
call fcn.004269f0
lea ecx, [esp + 0x60]
push ecx
mov dword [esp + 0x64], vtable.std::ios_base.0
call fcn.00480a75
add esp, 4
mov eax, esi
mov ecx, dword [esp + 0x1e0]
mov dword fs:[0], ecx
pop ecx
mov ecx, dword [esp + 0x1d8]
xor ecx, esp
call fcn.004b8dd5
add esp, 0x1e8
ret