Function at 0x40396d
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, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
mov dword [0x429d00], eax
cmp ax, 6
je 0x4039bd
push ebx
call fcn.004064dc
cmp eax, ebx
je 0x4039bd
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.0040646c
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x4039c2
push 0xb
call fcn.004064dc
push 9
call fcn.004064dc
push 7
mov dword [0x429d04], eax
call fcn.004064dc
cmp eax, ebx
je 0x403a07
push 0x1e
call eax
test eax, eax
je 0x403a07
or dword [0x429d00], 0x40000000
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x429df8], eax
lea eax, [esp + 0x38]
push eax
push ebx
push 0x4085c0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x428d00
call fcn.00406357
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov ebp, 0x434000
push ebp
call fcn.00406357
push 0x22
pop esi
mov dword [0x429d0c], 0x400000
mov eax, ebp
cmp word [0x434000], si
jne 0x403a71
mov edi, esi
mov eax, 0x434002
push edi
push eax
call fcn.00405e99
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov dword [esp + 0x18], eax
jmp 0x403b0b
push 0x20
pop edi
cmp cx, di
jne 0x403a97
inc eax
inc eax
cmp word [eax], di
je 0x403a90
mov edx, edi
cmp word [eax], si
jne 0x403aa2
inc eax
inc eax
mov edx, esi
cmp word [eax], 0x2f
jne 0x403afd
inc eax
inc eax
cmp word [eax], 0x53
jne 0x403ac8
movzx ecx, word [eax + 2]
cmp cx, di
je 0x403abe
cmp cx, bx
jne 0x403ac8
mov dword [0x429de0], 1
cmp dword [eax], 0x43004e
jne 0x403aec
cmp dword [eax + 4], 0x430052
jne 0x403aec
movzx ecx, word [eax + 8]
cmp cx, di
je 0x403ae7
cmp cx, bx
jne 0x403aec
or dword [esp + 0x1c], 4
cmp dword [eax - 4], 0x2f0020
jne 0x403afd
cmp dword [eax], 0x3d0044
je 0x403b19
push edx
push eax
call fcn.00405e99
cmp word [eax], si
jne 0x403b0b
inc eax
inc eax
movzx ecx, word [eax]
cmp cx, bx
jne 0x403a88
jmp 0x403b2d
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x434800
call fcn.00406357
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x436800
push esi
push 0x400
call edi
call fcn.00403912
test eax, eax
jne 0x403b9f
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403912
test eax, eax
jne 0x403b9f
push esi
push 0x3fc
call edi
push 0x408594
push esi
call sub.KERNEL32.dll_lstrcatW
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push str.TEMP
call edi
push esi
push 0x408580
call edi
call fcn.00403912
test eax, eax
je 0x403c32
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileW]
push 0x436000
call ebx
push dword [esp + 0x1c]
call fcn.004035ea
mov dword [esp + 0x10], eax
test eax, eax
jne 0x403c30
cmp dword [0x429d68], eax
je 0x403c20
push eax
push ebp
call fcn.00405e99
mov edi, eax
jmp 0x403be3
cmp dword [edi], 0x5f0020
jne 0x403be1
cmp dword [edi + 4], 0x3d003f
je 0x403be7
dec edi
dec edi
cmp edi, ebp
jae 0x403bd0
mov dword [esp + 0x10], str.Error_launching_installer
cmp edi, ebp
jb 0x403c5e
xor eax, eax
mov word [edi], ax
add edi, 8
push edi
call fcn.004066ca
test eax, eax
je 0x403c30
push edi
push 0x434800
call fcn.00406357
push edi
push 0x435000
call fcn.00406357
and dword [esp + 0x10], 0
or dword [0x429dec], 0xffffffff
call fcn.00405a3e
mov dword [esp + 0x14], eax
xor ebx, ebx
call fcn.00403943
call dword [sym.imp.ole32.dll_OleUninitialize]
pop ebp
cmp dword [esp + 0xc], ebx
je 0x403d5a
push 0x200010
push dword [esp + 0x10]
call fcn.00405e33
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004065c7
push 0x408574
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
test edi, edi
je 0x403c7f
push 0x408570
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x435800
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403c30
push esi
test edi, edi
je 0x403ca7
call fcn.00405d17
jmp 0x403cac
call fcn.00405d99
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x434800], 0
jne 0x403cc8
push ebp
push 0x434800
call fcn.00406357
push dword [esp + 0x18]
push section..ndata
call fcn.00406357
push 0x1a
mov dword [0x42a800], 0x41
pop ebp
mov edi, 0x4209c8
mov eax, dword [0x429d10]
push dword [eax + 0x120]
push edi
call fcn.00406752
push edi
call ebx
cmp dword [esp + 0x10], 0
je 0x403d44
push 1
push edi
push 0x437800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403d44
push 0
push edi
call fcn.00406b41
mov eax, dword [0x429d10]
push dword [eax + 0x124]
push edi
call fcn.00406752
push edi
call fcn.00405db6
test eax, eax
je 0x403d44
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [esp + 0x10], 0
inc word [0x42a800]
dec ebp
jne 0x403ce8
push ebp
push esi
call fcn.00406b41
jmp 0x403c30
cmp dword [0x429dd4], ebx
je 0x403dde
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403dae
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
push ebx
lea eax, [esp + 0x28]
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004064dc
mov esi, 0x80040002
cmp eax, ebx
je 0x403dca
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403dd7
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403dde
push 9
call fcn.0040141a
mov eax, dword [0x429dec]
cmp eax, 0xffffffff
je 0x403dec
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
jmp 0x403c58