Function at 0x4c9390
Capabilities:
Check os version
Get system information on windows

Disassembly:
push ebx
mov ebx, esp
sub esp, 8
and esp, 0xfffffff0
add esp, 4
push ebp
mov ebp, dword [ebx + 4]
mov dword [esp + 4], ebp
mov ebp, esp
sub esp, 0x160
mov eax, dword [0x565300]
xor eax, ebp
mov dword [ebp - 4], eax
cmp dword [0x579dd0], 0
jne 0x4c9722
push 0x118
lea eax, [ebp - 0x124]
push 0
push eax
call sub.VCRUNTIME140.dll_memset
add esp, 0xc
mov dword [ebp - 0x128], 0x11c
push str.RtlGetVersion
push str.NtDll.dll
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x4c942d
lea ecx, [ebp - 0x128]
push ecx
call eax
test eax, eax
je 0x4c942d
lea eax, [ebp - 0x128]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
jne 0x4c942d
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.0050ea5d
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret
push 0
push 0x52ca68
mov ecx, 0x579b34
mov dword [0x579b38], 0
call fcn.00403c10
mov eax, dword [ebp - 0x118]
sub eax, 0
je 0x4c9681
sub eax, 1
je 0x4c963e
sub eax, 1
je 0x4c9471
push 0
push 0x52ca68
jmp 0x4c9692
mov eax, dword [ebp - 0x124]
cmp eax, 4
ja 0x4c9492
push 0xa
mov dword [0x579b38], 0x40
push str.Windows_NT
jmp 0x4c9692
cmp eax, 5
jne 0x4c94f7
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x4c94b7
push 0xc
mov dword [0x579b38], 0x80
push str.Windows_2000
jmp 0x4c9692
cmp eax, 1
je 0x4c94e1
cmp eax, 2
jne 0x4c969c
cmp byte [ebp - 0xe], 1
je 0x4c94e1
push 0xc
mov dword [0x579b38], 0x200
push str.Windows_2003
jmp 0x4c9692
push 0xa
mov dword [0x579b38], 0x100
push str.Windows_XP
jmp 0x4c9692
cmp eax, 6
jne 0x4c95f8
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x4c9541
cmp byte [ebp - 0xe], 1
mov ecx, 0x579b34
jne 0x4c952b
push 0xd
mov dword [0x579b38], 0x400
push str.Windows_Vista
jmp 0x4c9697
push 0x13
mov dword [0x579b38], 0x8000
push str.Windows_Server_2008
jmp 0x4c9697
cmp eax, 1
jne 0x4c957c
mov ecx, 0x579b34
cmp byte [ebp - 0xe], al
je 0x4c9566
push 0x16
mov dword [0x579b38], 0x8000
push str.Windows_Server_2008_R2
jmp 0x4c9697
push 9
mov dword [0x579b38], 0x800
push str.Windows_7
jmp 0x4c9697
cmp eax, 2
jne 0x4c95b8
cmp byte [ebp - 0xe], 1
mov ecx, 0x579b34
jne 0x4c95a2
push 9
mov dword [0x579b38], 0x1000
push str.Windows_8
jmp 0x4c9697
push 0x13
mov dword [0x579b38], 0x10000
push str.Windows_Server_2012
jmp 0x4c9697
cmp eax, 3
jne 0x4c969c
cmp byte [ebp - 0xe], 1
mov ecx, 0x579b34
jne 0x4c95e2
push 0xb
mov dword [0x579b38], 0x2000
push str.Windows_8.1
jmp 0x4c9697
push 0x16
mov dword [0x579b38], 0x10000
push str.Windows_Server_2012_R2
jmp 0x4c9697
cmp eax, 0xa
jne 0x4c969c
cmp dword [ebp - 0x120], 0
jne 0x4c969c
cmp byte [ebp - 0xe], 1
mov ecx, 0x579b34
jne 0x4c962b
push eax
mov dword [0x579b38], 0x4000
push str.Windows_10
jmp 0x4c9697
push 0x13
mov dword [0x579b38], 0x20000
push str.Windows_Server_2016
jmp 0x4c9697
cmp dword [ebp - 0x124], 4
jne 0x4c969c
mov eax, dword [ebp - 0x120]
test eax, eax
je 0x4c966e
cmp eax, 0xa
je 0x4c966e
cmp eax, 0x5a
jne 0x4c969c
push 0xa
mov dword [0x579b38], 0x20
push str.Windows_ME
jmp 0x4c9692
push 0xa
mov dword [0x579b38], 8
push str.Windows_9x
jmp 0x4c9692
push 0xb
mov dword [0x579b38], 1
push str.Windows_3.2
mov ecx, 0x579b34
call fcn.00403c10
xorps xmm0, xmm0
mov dword [ebp - 0x140], 0
push str.GetNativeSystemInfo
push str.kernel32.dll
movaps xmmword [ebp - 0x160], xmm0
movaps xmmword [ebp - 0x150], xmm0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x4c96dd
lea ecx, [ebp - 0x160]
push ecx
call eax
jmp 0x4c96ea
lea eax, [ebp - 0x160]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov ax, word [ebp - 0x160]
cmp ax, 9
je 0x4c970e
cmp ax, 6
je 0x4c970e
test ax, ax
jne 0x4c9718
mov dword [0x579b3c], 0
jmp 0x4c9718
mov dword [0x579b3c], 1
mov dword [0x579dd0], 1
mov ecx, dword [ebp - 4]
mov eax, 1
xor ecx, ebp
call fcn.0050ea5d
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret