Function at 0x439be0
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 [0x60e9b0]
xor eax, ebp
mov dword [ebp - 4], eax
cmp dword [0x618094], 0
jne 0x439f99
push 0x11c
lea eax, [ebp - 0x128]
push 0
push eax
call fcn.00559270
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 0x439c7d
lea ecx, [ebp - 0x128]
push ecx
call eax
test eax, eax
je 0x439c7d
lea eax, [ebp - 0x128]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
jne 0x439c7d
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.00555b37
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret
push 0
push 0x5e90d4
mov ecx, 0x61659c
mov dword [0x615f48], 0
call fcn.00407d30
mov eax, dword [ebp - 0x118]
sub eax, 0
je 0x439efa
sub eax, 1
je 0x439eaa
sub eax, 1
je 0x439cbf
push 0x5e90d4
jmp 0x439f09
mov eax, dword [ebp - 0x124]
cmp eax, 4
ja 0x439cde
mov dword [0x615f48], 0x40
push str.Windows_NT
jmp 0x439f09
cmp eax, 5
jne 0x439d56
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x439d01
mov dword [0x615f48], 0x80
push str.Windows_2000
jmp 0x439f09
cmp eax, 1
jne 0x439d1a
mov dword [0x615f48], 0x100
push str.Windows_XP
jmp 0x439f09
cmp eax, 2
jne 0x439f13
cmp byte [ebp - 0xe], 1
mov ecx, 0x61659c
jne 0x439d42
mov dword [0x615f48], 0x100
push str.Windows_XP
jmp 0x439f0e
mov dword [0x615f48], 0x200
push str.Windows_2003
jmp 0x439f0e
cmp eax, 6
jne 0x439e47
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x439d9c
cmp byte [ebp - 0xe], 1
mov ecx, 0x61659c
jne 0x439d88
mov dword [0x615f48], 0x400
push str.Windows_Vista
jmp 0x439f0e
mov dword [0x615f48], 0x8000
push str.Windows_Server_2008
jmp 0x439f0e
cmp eax, 1
jne 0x439dd3
mov ecx, 0x61659c
cmp byte [ebp - 0xe], al
je 0x439dbf
mov dword [0x615f48], 0x8000
push str.Windows_Server_2008_R2
jmp 0x439f0e
mov dword [0x615f48], 0x800
push str.Windows_7
jmp 0x439f0e
cmp eax, 2
jne 0x439e0b
cmp byte [ebp - 0xe], 1
mov ecx, 0x61659c
jne 0x439df7
mov dword [0x615f48], 0x1000
push str.Windows_8
jmp 0x439f0e
mov dword [0x615f48], 0x10000
push str.Windows_Server_2012
jmp 0x439f0e
cmp eax, 3
jne 0x439f13
cmp byte [ebp - 0xe], 1
mov ecx, 0x61659c
jne 0x439e33
mov dword [0x615f48], 0x2000
push str.Windows_8.1
jmp 0x439f0e
mov dword [0x615f48], 0x10000
push str.Windows_Server_2012_R2
jmp 0x439f0e
cmp eax, 0xa
jne 0x439f13
cmp dword [ebp - 0x120], 0
jne 0x439f13
cmp byte [ebp - 0xe], 1
jne 0x439e99
cmp dword [ebp - 0x11c], 0x55f0
mov ecx, 0x61659c
jb 0x439e88
mov dword [0x615f48], 0x40000
push str.Windows_11
jmp 0x439f0e
mov dword [0x615f48], 0x4000
push str.Windows_10
jmp 0x439f0e
mov dword [0x615f48], 0x20000
push str.Windows_Server_2016
jmp 0x439f09
cmp dword [ebp - 0x124], 4
jne 0x439f13
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x439ece
mov dword [0x615f48], 8
push str.Windows_9x
jmp 0x439f09
cmp eax, 0xa
jne 0x439ee4
mov dword [0x615f48], 8
push str.Windows_9x
jmp 0x439f09
cmp eax, 0x5a
jne 0x439f13
mov dword [0x615f48], 0x20
push str.Windows_ME
jmp 0x439f09
mov dword [0x615f48], 1
push str.Windows_3.2
mov ecx, 0x61659c
call fcn.00407de0
xorps xmm0, xmm0
mov dword [ebp - 0x140], 0
push 0x5f3284
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 0x439f54
lea ecx, [ebp - 0x160]
push ecx
call eax
jmp 0x439f61
lea eax, [ebp - 0x160]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov ax, word [ebp - 0x160]
cmp ax, 9
je 0x439f85
cmp ax, 6
je 0x439f85
test ax, ax
jne 0x439f8f
mov dword [0x615f44], 0
jmp 0x439f8f
mov dword [0x615f44], 1
mov dword [0x618094], 1
mov ecx, dword [ebp - 4]
mov eax, 1
xor ecx, ebp
call fcn.00555b37
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret