Function at 0x454a20
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 [0x5c4104]
xor eax, ebp
mov dword [ebp - 4], eax
cmp dword [0x5ca028], 0
jne 0x454dd9
push 0x11c
lea eax, [ebp - 0x128]
push 0
push eax
call fcn.0051f290
add esp, 0xc
mov dword [ebp - 0x128], 0x11c
push 0x5a09fc
push str.NtDll.dll
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
test eax, eax
je 0x454abd
lea ecx, [ebp - 0x128]
push ecx
call eax
test eax, eax
je 0x454abd
lea eax, [ebp - 0x128]
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
test eax, eax
jne 0x454abd
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.0051b15a
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret
push 0
push 0x59af0c
mov ecx, 0x5c9f3c
mov dword [0x5c97c4], 0
call fcn.00405730
mov eax, dword [ebp - 0x118]
sub eax, 0
je 0x454d3a
sub eax, 1
je 0x454cea
sub eax, 1
je 0x454aff
push 0x59af0c
jmp 0x454d49
mov eax, dword [ebp - 0x124]
cmp eax, 4
ja 0x454b1e
mov dword [0x5c97c4], 0x40
push str.Windows_NT
jmp 0x454d49
cmp eax, 5
jne 0x454b96
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x454b41
mov dword [0x5c97c4], 0x80
push str.Windows_2000
jmp 0x454d49
cmp eax, 1
jne 0x454b5a
mov dword [0x5c97c4], 0x100
push str.Windows_XP
jmp 0x454d49
cmp eax, 2
jne 0x454d53
cmp byte [ebp - 0xe], 1
mov ecx, 0x5c9f3c
jne 0x454b82
mov dword [0x5c97c4], 0x100
push str.Windows_XP
jmp 0x454d4e
mov dword [0x5c97c4], 0x200
push str.Windows_2003
jmp 0x454d4e
cmp eax, 6
jne 0x454c87
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x454bdc
cmp byte [ebp - 0xe], 1
mov ecx, 0x5c9f3c
jne 0x454bc8
mov dword [0x5c97c4], 0x400
push str.Windows_Vista
jmp 0x454d4e
mov dword [0x5c97c4], 0x8000
push str.Windows_Server_2008
jmp 0x454d4e
cmp eax, 1
jne 0x454c13
mov ecx, 0x5c9f3c
cmp byte [ebp - 0xe], al
je 0x454bff
mov dword [0x5c97c4], 0x8000
push str.Windows_Server_2008_R2
jmp 0x454d4e
mov dword [0x5c97c4], 0x800
push str.Windows_7
jmp 0x454d4e
cmp eax, 2
jne 0x454c4b
cmp byte [ebp - 0xe], 1
mov ecx, 0x5c9f3c
jne 0x454c37
mov dword [0x5c97c4], 0x1000
push str.Windows_8
jmp 0x454d4e
mov dword [0x5c97c4], 0x10000
push str.Windows_Server_2012
jmp 0x454d4e
cmp eax, 3
jne 0x454d53
cmp byte [ebp - 0xe], 1
mov ecx, 0x5c9f3c
jne 0x454c73
mov dword [0x5c97c4], 0x2000
push str.Windows_8.1
jmp 0x454d4e
mov dword [0x5c97c4], 0x10000
push str.Windows_Server_2012_R2
jmp 0x454d4e
cmp eax, 0xa
jne 0x454d53
cmp dword [ebp - 0x120], 0
jne 0x454d53
cmp byte [ebp - 0xe], 1
jne 0x454cd9
cmp dword [ebp - 0x11c], 0x55f0
mov ecx, 0x5c9f3c
jb 0x454cc8
mov dword [0x5c97c4], 0x40000
push str.Windows_11
jmp 0x454d4e
mov dword [0x5c97c4], 0x4000
push str.Windows_10
jmp 0x454d4e
mov dword [0x5c97c4], 0x20000
push str.Windows_Server_2016
jmp 0x454d49
cmp dword [ebp - 0x124], 4
jne 0x454d53
mov eax, dword [ebp - 0x120]
test eax, eax
jne 0x454d0e
mov dword [0x5c97c4], 8
push str.Windows_9x
jmp 0x454d49
cmp eax, 0xa
jne 0x454d24
mov dword [0x5c97c4], 8
push str.Windows_9x
jmp 0x454d49
cmp eax, 0x5a
jne 0x454d53
mov dword [0x5c97c4], 0x20
push str.Windows_ME
jmp 0x454d49
mov dword [0x5c97c4], 1
push str.Windows_3.2
mov ecx, 0x5c9f3c
call fcn.00404d50
xorps xmm0, xmm0
mov dword [ebp - 0x140], 0
push 0x5a0298
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 0x454d94
lea ecx, [ebp - 0x160]
push ecx
call eax
jmp 0x454da1
lea eax, [ebp - 0x160]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemInfo]
mov ax, word [ebp - 0x160]
cmp ax, 9
je 0x454dc5
cmp ax, 6
je 0x454dc5
test ax, ax
jne 0x454dcf
mov dword [0x5c94ac], 0
jmp 0x454dcf
mov dword [0x5c94ac], 1
mov dword [0x5ca028], 1
mov ecx, dword [ebp - 4]
mov eax, 1
xor ecx, ebp
call fcn.0051b15a
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
ret