Function at 0x491e20
Capabilities:
Check os version
Get system information on windows

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x144
mov eax, dword [0x536364]
xor eax, ebp
mov dword [ebp - 4], eax
cmp dword [0x53f45c], 0
jne 0x49216c
push 0x118
lea eax, [ebp - 0x11c]
push 0
push eax
call fcn.004c10f0
add esp, 0xc
mov dword [ebp - 0x120], 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 0x491ea7
lea ecx, [ebp - 0x120]
push ecx
call eax
test eax, eax
je 0x491ea7
lea eax, [ebp - 0x120]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
jne 0x491ea7
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.004a1e09
mov esp, ebp
pop ebp
ret
mov ax, word [ebp - 0xc]
mov ecx, 0x53f240
push 0
push 0x50b270
mov word [0x53f24c], ax
mov dword [0x53f244], 0
call fcn.004864d0
mov eax, dword [ebp - 0x110]
sub eax, 0
je 0x4920af
sub eax, 1
je 0x49206c
sub eax, 1
je 0x491ef5
push 0
push 0x50b270
jmp 0x4920c0
mov eax, dword [ebp - 0x11c]
cmp eax, 4
ja 0x491f16
push 0xa
mov dword [0x53f244], 0x40
push str.Windows_NT
jmp 0x4920c0
cmp eax, 5
jne 0x491f75
mov eax, dword [ebp - 0x118]
test eax, eax
jne 0x491f3b
push 0xc
mov dword [0x53f244], 0x80
push str.Windows_2000
jmp 0x4920c0
cmp eax, 1
jne 0x491f56
push 0xa
mov dword [0x53f244], 0x100
push str.Windows_XP
jmp 0x4920c0
cmp eax, 2
jne 0x4920ca
push 0xc
mov dword [0x53f244], 0x200
push str.Windows_2003
jmp 0x4920c0
cmp eax, 6
jne 0x492019
mov eax, dword [ebp - 0x118]
test eax, eax
jne 0x491f9e
push 0xd
mov dword [0x53f244], 0x400
push str.Windows_Vista
jmp 0x4920c0
cmp eax, 1
jne 0x491fb9
push 9
mov dword [0x53f244], 0x800
push str.Windows_7
jmp 0x4920c0
cmp eax, 2
jne 0x491fd4
push 9
mov dword [0x53f244], 0x1000
push str.Windows_8
jmp 0x4920c0
cmp eax, 3
jne 0x491fef
push 0xb
mov dword [0x53f244], 0x2000
push str.Windows_8.1
jmp 0x4920c0
cmp eax, 4
jne 0x4920ca
mov eax, dword [ebp - 0x114]
cmp eax, 0x2671
je 0x492033
cmp eax, 0x2684
je 0x492033
cmp eax, 0x2697
jne 0x4920ca
jmp 0x492033
cmp eax, 0xa
jne 0x492054
cmp dword [ebp - 0x118], 0
jne 0x492046
cmp dword [ebp - 0x114], 0x55ec
jae 0x492059
push 0xa
mov dword [0x53f244], 0x4000
push str.Windows_10
jmp 0x4920c0
cmp dword [ebp - 0x114], 0x55ec
jae 0x492059
jmp 0x4920ca
cmp eax, 0xb
jb 0x4920ca
push 0xa
mov dword [0x53f244], 0x10000
push str.Windows_11
jmp 0x4920c0
cmp dword [ebp - 0x11c], 4
jne 0x4920ca
mov eax, dword [ebp - 0x118]
test eax, eax
je 0x49209c
cmp eax, 0xa
je 0x49209c
cmp eax, 0x5a
jne 0x4920ca
push 0xa
mov dword [0x53f244], 0x20
push str.Windows_ME
jmp 0x4920c0
push 0xa
mov dword [0x53f244], 8
push str.Windows_9x
jmp 0x4920c0
push 0xb
mov dword [0x53f244], 1
push str.Windows_3.2
mov ecx, 0x53f240
call fcn.004864d0
xor eax, eax
push 0x4f8c40
push 0x4f7d7c
mov dword [ebp - 0x144], eax
mov dword [ebp - 0x140], eax
mov dword [ebp - 0x13c], eax
mov dword [ebp - 0x138], eax
mov dword [ebp - 0x134], eax
mov dword [ebp - 0x130], eax
mov dword [ebp - 0x12c], eax
mov dword [ebp - 0x128], eax
mov dword [ebp - 0x124], eax
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x492128
lea ecx, [ebp - 0x144]
push ecx
call eax
jmp 0x492135
lea eax, [ebp - 0x144]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov eax, dword [ebp - 0x144]
cmp ax, 9
je 0x492158
cmp ax, 6
je 0x492158
test ax, ax
jne 0x492162
mov dword [0x53f248], 0
jmp 0x492162
mov dword [0x53f248], 1
mov dword [0x53f45c], 1
mov ecx, dword [ebp - 4]
mov eax, 1
xor ecx, ebp
call fcn.004a1e09
mov esp, ebp
pop ebp
ret