Function at 0x41b100
Capabilities:
Check os version
Query or enumerate registry value

Disassembly:
push 0xffffffffffffffff
push 0x4e1a4b
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
sub esp, 0x1b4
push ebx
push ebp
push esi
push edi
push 0x517348
lea ecx, [esp + 0x18]
mov dword [esp + 0x20], 0
call fcn.004d38eb
mov ebx, 1
push 0x517348
lea ecx, [esp + 0x14]
mov dword [esp + 0x1d0], ebx
call fcn.004d38eb
push 0x517348
lea ecx, [esp + 0x1c]
mov byte [esp + 0x1d0], 2
call fcn.004d38eb
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExA]
mov ecx, 0x27
xor eax, eax
lea edi, [esp + 0x28]
rep stosd dword es:[edi], eax
lea eax, [esp + 0x28]
mov byte [esp + 0x1cc], 3
push eax
mov dword [esp + 0x2c], 0x9c
call esi
mov edi, eax
test edi, edi
jne 0x41b1c4
lea ecx, [esp + 0x28]
mov dword [esp + 0x28], 0x94
push ecx
call esi
test eax, eax
jne 0x41b1c4
mov esi, dword [esp + 0x1d4]
push 0x517348
mov ecx, esi
call fcn.004d38eb
mov dword [esp + 0x1c], ebx
jmp 0x41b5c2
mov eax, dword [esp + 0x38]
sub eax, 0
je 0x41b581
dec eax
je 0x41b4fc
dec eax
jne 0x41b58f
mov eax, dword [esp + 0x2c]
mov esi, 5
cmp eax, esi
jne 0x41b237
cmp dword [esp + 0x30], 2
jne 0x41b207
push str.WIN2003_family
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp dword [esp + 0x2c], esi
jne 0x41b237
cmp dword [esp + 0x30], ebx
jne 0x41b221
push str.WINXP
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp dword [esp + 0x2c], esi
jne 0x41b237
mov eax, dword [esp + 0x30]
test eax, eax
jne 0x41b24c
push str.WIN2000
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp dword [esp + 0x2c], 4
ja 0x41b24c
push str.WINNT
lea ecx, [esp + 0x18]
call fcn.004d3a06
mov ebp, dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test edi, edi
mov edi, dword [sym.imp.ADVAPI32.dll_RegOpenKeyExA]
je 0x41b339
mov al, byte [esp + 0xc2]
cmp al, bl
jne 0x41b29c
cmp dword [esp + 0x2c], 4
jne 0x41b27c
push str.Workstation_4.0
jmp 0x41b402
mov eax, dword [esp + 0xc0]
test ah, 2
je 0x41b292
push str.Home_Edition
jmp 0x41b402
push str.Professional
jmp 0x41b402
cmp al, 3
jne 0x41b40b
cmp dword [esp + 0x2c], esi
jne 0x41b31b
mov eax, dword [esp + 0x30]
cmp eax, 2
jne 0x41b2f0
mov eax, dword [esp + 0xc0]
test al, 0x80
je 0x41b2c8
push str.Datacenter_Edition
jmp 0x41b402
test al, 2
je 0x41b2d6
push str.Enterprise_Edition
jmp 0x41b402
cmp ax, 0x400
jne 0x41b2e6
push str.Web_Edition
jmp 0x41b402
push str.Standard_Edition
jmp 0x41b402
test eax, eax
jne 0x41b31b
mov al, byte [esp + 0xc0]
test al, 0x80
je 0x41b309
push str.Datacenter_Server
jmp 0x41b402
test al, 2
jne 0x41b3fd
push str.Server
jmp 0x41b402
test byte [esp + 0xc0], 2
je 0x41b32f
push str.Server_4.0__Enterprise_Edition
jmp 0x41b402
push str.Server_4.0
jmp 0x41b402
lea edx, [esp + 0x20]
mov esi, 0xff
push edx
push ebx
push 0
push str.SYSTEMCurrentControlSetControlProductOptions
push reloc.OLEAUT32.dll_SysReAllocString
mov dword [esp + 0x38], esi
call edi
test eax, eax
je 0x41b372
mov esi, dword [esp + 0x1d4]
push 0x517348
mov ecx, esi
call fcn.004d38eb
jmp 0x41b5be
mov edx, dword [esp + 0x20]
lea eax, [esp + 0x24]
lea ecx, [esp + 0xc4]
push eax
push ecx
push 0
push 0
push str.ProductType
push edx
call dword [sym.imp.ADVAPI32.dll_RegQueryValueExA]
test eax, eax
jne 0x41b35a
cmp dword [esp + 0x24], esi
ja 0x41b35a
mov eax, dword [esp + 0x20]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
lea ecx, [esp + 0xc4]
push ecx
push 0x509564
call ebp
test eax, eax
jne 0x41b3c9
push str.Workstation
lea ecx, [esp + 0x14]
call fcn.004d3a06
lea edx, [esp + 0xc4]
push edx
push str.LANMANNT
call ebp
test eax, eax
jne 0x41b3ea
push str.Server
lea ecx, [esp + 0x14]
call fcn.004d3a06
lea eax, [esp + 0xc4]
push eax
push str.SERVERNT
call ebp
test eax, eax
jne 0x41b40b
push str.Advanced_Server
lea ecx, [esp + 0x14]
call fcn.004d3a06
cmp dword [esp + 0x2c], 4
jne 0x41b4bd
lea ecx, [esp + 0x3c]
push str.Service_Pack_6
push ecx
call ebp
test eax, eax
jne 0x41b4bd
lea edx, [esp + 0x20]
push edx
push ebx
push eax
push str.SOFTWAREMicrosoftWindows_NTCurrentVersionHotfixQ246009
push reloc.OLEAUT32.dll_SysReAllocString
call edi
test eax, eax
jne 0x41b46d
mov eax, dword [esp + 0x34]
lea ecx, [esp + 0x18]
and eax, 0xffff
push eax
push str.Service_Pack_6a__Build__d_
push ecx
call fcn.004d2912
mov edx, dword [esp + 0x2c]
add esp, 0xc
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
jmp 0x41b58f
mov edx, dword [esp + 0x34]
mov eax, dword [esp + 0x30]
mov ecx, dword [esp + 0x2c]
and edx, 0xffff
push edx
push eax
lea edx, [esp + 0x44]
push ecx
push edx
lea eax, [esp + 0xd4]
push str._s__Build__d._d._d_
push eax
call fcn.004add1e
add esp, 0x18
lea ecx, [esp + 0xc4]
push ecx
lea ecx, [esp + 0x1c]
call fcn.004d3a06
mov edx, dword [esp + 0x20]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
jmp 0x41b58f
mov eax, dword [esp + 0x34]
mov ecx, dword [esp + 0x30]
mov edx, dword [esp + 0x2c]
and eax, 0xffff
push eax
push ecx
lea eax, [esp + 0x44]
push edx
push eax
lea ecx, [esp + 0xd4]
push str._s_Build:_d._d._d
push ecx
call fcn.004add1e
add esp, 0x18
lea edx, [esp + 0xc4]
lea ecx, [esp + 0x18]
push edx
jmp 0x41b58a
mov eax, dword [esp + 0x2c]
mov esi, 4
cmp eax, esi
jne 0x41b58f
mov eax, dword [esp + 0x30]
test eax, eax
jne 0x41b543
push str.WIN95
lea ecx, [esp + 0x18]
call fcn.004d3a06
mov al, byte [esp + 0x3d]
cmp al, 0x43
je 0x41b52f
cmp al, 0x42
jne 0x41b53d
push str.OSR2
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp dword [esp + 0x2c], esi
jne 0x41b58f
cmp dword [esp + 0x30], 0xa
jne 0x41b573
push str.WIN98
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp byte [esp + 0x3d], 0x41
jne 0x41b56d
push 0x50947c
lea ecx, [esp + 0x18]
call fcn.004d3a06
cmp dword [esp + 0x2c], esi
jne 0x41b58f
cmp dword [esp + 0x30], 0x5a
jne 0x41b58f
push str.MS_Millennium_Edition
jmp 0x41b586
push str.Microsoft_Win32s
lea ecx, [esp + 0x18]
call fcn.004d3a06
lea eax, [esp + 0x10]
lea ecx, [esp + 0x14]
push eax
call fcn.004d3c95
lea ecx, [esp + 0x18]
push ecx
lea ecx, [esp + 0x18]
call fcn.004d3c95
mov esi, dword [esp + 0x1d4]
lea edx, [esp + 0x14]
push edx
mov ecx, esi
call fcn.004d35f2
mov dword [esp + 0x1c], ebx
lea ecx, [esp + 0x18]
mov byte [esp + 0x1cc], 2
call fcn.004d387d
lea ecx, [esp + 0x10]
mov byte [esp + 0x1cc], bl
call fcn.004d387d
lea ecx, [esp + 0x14]
mov byte [esp + 0x1cc], 0
call fcn.004d387d
mov ecx, dword [esp + 0x1c4]
mov eax, esi
pop edi
pop esi
pop ebp
pop ebx
mov dword fs:[0], ecx
add esp, 0x1c0
ret