Function at 0x440670
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 [0x5b3124]
xor eax, ebp
mov dword [ebp - 4], eax
cmp dword [0x5b8be4], 0
jne 0x440a09
push 0x11c
lea eax, [ebp - 0x128]
push 0
push eax
call fcn.0050d580
add esp, 0xc
mov dword [ebp - 0x128], 0x11c
push 0x590c0c
push str.NtDll.dll
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x44070d
lea ecx, [ebp - 0x128]
push ecx
call eax
test eax, eax
je 0x44070d
lea eax, [ebp - 0x128]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
jne 0x44070d
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.0050975e
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret
push 0
push 0x587dac
mov ecx, 0x5b8ac0
mov dword [0x5b816c], 0
call fcn.00405500
mov eax, dword [ebp - 0x118]
sub eax, 0
je 0x44096a
sub eax, 1
je 0x44091a
sub eax, 1
je 0x44074f
push 0x587dac
jmp 0x440979
mov eax, dword [ebp - 0x124]
cmp eax, 4
ja 0x44076e
mov dword [0x5b816c], 0x40
push str.Windows_NT
jmp 0x440979
cmp eax, 5
jne 0x4407e6
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x440791
mov dword [0x5b816c], 0x80
push str.Windows_2000
jmp 0x440979
cmp eax, 1
jne 0x4407aa
mov dword [0x5b816c], 0x100
push str.Windows_XP
jmp 0x440979
cmp eax, 2
jne 0x440983
cmp byte [ebp - 0xe], 1
mov ecx, 0x5b8ac0
jne 0x4407d2
mov dword [0x5b816c], 0x100
push str.Windows_XP
jmp 0x44097e
mov dword [0x5b816c], 0x200
push str.Windows_2003
jmp 0x44097e
cmp eax, 6
jne 0x4408d7
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x44082c
cmp byte [ebp - 0xe], 1
mov ecx, 0x5b8ac0
jne 0x440818
mov dword [0x5b816c], 0x400
push str.Windows_Vista
jmp 0x44097e
mov dword [0x5b816c], 0x8000
push str.Windows_Server_2008
jmp 0x44097e
cmp eax, 1
jne 0x440863
mov ecx, 0x5b8ac0
cmp byte [ebp - 0xe], al
je 0x44084f
mov dword [0x5b816c], 0x8000
push str.Windows_Server_2008_R2
jmp 0x44097e
mov dword [0x5b816c], 0x800
push str.Windows_7
jmp 0x44097e
cmp eax, 2
jne 0x44089b
cmp byte [ebp - 0xe], 1
mov ecx, 0x5b8ac0
jne 0x440887
mov dword [0x5b816c], 0x1000
push str.Windows_8
jmp 0x44097e
mov dword [0x5b816c], 0x10000
push str.Windows_Server_2012
jmp 0x44097e
cmp eax, 3
jne 0x440983
cmp byte [ebp - 0xe], 1
mov ecx, 0x5b8ac0
jne 0x4408c3
mov dword [0x5b816c], 0x2000
push str.Windows_8.1
jmp 0x44097e
mov dword [0x5b816c], 0x10000
push str.Windows_Server_2012_R2
jmp 0x44097e
cmp eax, 0xa
jne 0x440983
cmp dword [ebp - 0x120], 0
jne 0x440983
cmp byte [ebp - 0xe], 1
mov ecx, 0x5b8ac0
jne 0x440909
mov dword [0x5b816c], 0x4000
push str.Windows_10
jmp 0x44097e
mov dword [0x5b816c], 0x20000
push str.Windows_Server_2016
jmp 0x44097e
cmp dword [ebp - 0x124], 4
jne 0x440983
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x44093e
mov dword [0x5b816c], 8
push str.Windows_9x
jmp 0x440979
cmp eax, 0xa
jne 0x440954
mov dword [0x5b816c], 8
push str.Windows_9x
jmp 0x440979
cmp eax, 0x5a
jne 0x440983
mov dword [0x5b816c], 0x20
push str.Windows_ME
jmp 0x440979
mov dword [0x5b816c], 1
push str.Windows_3.2
mov ecx, 0x5b8ac0
call fcn.00404b10
xorps xmm0, xmm0
mov dword [ebp - 0x140], 0
push 0x58f9e8
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 0x4409c4
lea ecx, [ebp - 0x160]
push ecx
call eax
jmp 0x4409d1
lea eax, [ebp - 0x160]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov ax, word [ebp - 0x160]
cmp ax, 9
je 0x4409f5
cmp ax, 6
je 0x4409f5
test ax, ax
jne 0x4409ff
mov dword [0x5b8168], 0
jmp 0x4409ff
mov dword [0x5b8168], 1
mov dword [0x5b8be4], 1
mov ecx, dword [ebp - 4]
mov eax, 1
xor ecx, ebp
call fcn.0050975e
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret