Function at 0x40332f
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x184
push ebx
push esi
push edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x20], ebx
mov byte [esp + 0x14], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42f42c], eax
je 0x403381
push ebx
call fcn.00406453
cmp eax, ebx
je 0x403381
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004063e5
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x403386
push 0xa
call fcn.00406453
push 8
call fcn.00406453
push 6
mov dword [0x42f424], eax
call fcn.00406453
cmp eax, ebx
je 0x4033c8
push 0x1e
call eax
test eax, eax
je 0x4033c8
or byte [0x42f42f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42f4f8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x429858
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42ec20
call fcn.004060bb
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x435000
push eax
push ebp
call fcn.004060bb
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x435000], 0x22
mov dword [0x42f420], eax
mov eax, ebp
jne 0x403434
mov byte [esp + 0x14], 0x22
mov eax, 0x435001
push dword [esp + 0x14]
push eax
call fcn.00405a7e
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x40350e
cmp cl, 0x20
jne 0x403459
inc eax
cmp byte [eax], 0x20
je 0x403453
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403469
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4034fe
inc eax
cmp byte [eax], 0x53
jne 0x40348e
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x403484
cmp cl, bl
jne 0x40348e
mov dword [0x42f4e0], 1
movsx ecx, byte [0x40a1e7]
movsx edx, byte [0x40a1e6]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1e5]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4034ce
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4034c9
cmp cl, bl
jne 0x4034ce
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a1df]
movsx edx, byte [0x40a1de]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1dd]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x40351a
push dword [esp + 0x14]
push eax
call fcn.00405a7e
cmp byte [eax], 0x22
jne 0x40350e
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x40344e
jmp 0x40352b
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x435400
call fcn.004060bb
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x436400
push esi
push 0x400
call edi
call fcn.004032fe
test eax, eax
jne 0x40359d
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004032fe
test eax, eax
jne 0x40359d
push esi
push 0x3fc
call edi
push 0x40a1d0
push esi
call sub.KERNEL32.dll_lstrcatA
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push esi
push str.TEMP
call edi
push esi
push 0x40a1c4
call edi
call fcn.004032fe
test eax, eax
je 0x40364b
push 0x436000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402d98
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40364b
cmp dword [0x42f440], ebx
je 0x40363b
push ebx
push ebp
call fcn.00405a7e
mov edi, eax
cmp edi, ebp
jb 0x403606
movsx eax, byte [0x40a1bf]
movsx ecx, byte [0x40a1be]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bd]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bc]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x403606
dec edi
cmp edi, ebp
jae 0x4035fd
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403677
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405b41
test eax, eax
je 0x40364b
push edi
push 0x435400
call fcn.004060bb
push edi
push 0x435800
call fcn.004060bb
mov dword [esp + 0x10], ebx
or dword [0x42f4ec], 0xffffffff
call fcn.0040390b
mov dword [esp + 0x18], eax
call fcn.00403819
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x40377f
push 0x200010
push dword [esp + 0x10]
call fcn.004057d7
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405742
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403698
push 0x40a1b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x435c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40364b
cmp edi, ebx
push esi
je 0x4036c0
call fcn.004056a8
jmp 0x4036c5
call fcn.00405725
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x435400], bl
jne 0x4036df
push ebp
push 0x435400
call fcn.004060bb
push dword [esp + 0x1c]
push section..ndata
call fcn.004060bb
movsx cx, byte [0x40a1a4]
xor eax, eax
push 0x1a
mov ah, byte [0x40a1a5]
pop ebp
or eax, ecx
mov edi, 0x429458
mov word [0x430400], ax
mov eax, dword [0x42f434]
push dword [eax + 0x120]
push edi
call fcn.004060dd
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40376a
push 1
push edi
push 0x436c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40376a
push ebx
push edi
call fcn.00405e9a
mov eax, dword [0x42f434]
push dword [eax + 0x124]
push edi
call fcn.004060dd
push edi
call fcn.0040575a
cmp eax, ebx
je 0x40376a
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x430400]
dec ebp
jne 0x40370d
push ebx
push esi
call fcn.00405e9a
jmp 0x40364b
cmp dword [0x42f4d4], ebx
je 0x403801
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
push 2
test eax, eax
pop edi
je 0x4037d2
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x2c]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], edi
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406453
cmp eax, ebx
mov esi, 0x80040002
je 0x4037ee
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4037fa
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403801
push 9
call fcn.0040140b
mov eax, dword [0x42f4ec]
cmp eax, 0xffffffff
je 0x40380f
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]