Function at 0x40338f
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
cmp ax, 6
mov dword [0x434eec], eax
je 0x4033df
push ebx
call fcn.00406694
cmp eax, ebx
je 0x4033df
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406624
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x4033e4
push 0xa
call fcn.00406694
push 8
call fcn.00406694
push 6
mov dword [0x434ee4], eax
call fcn.00406694
cmp eax, ebx
je 0x403427
push 0x1e
call eax
test eax, eax
je 0x403427
or byte [0x434eef], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x434fb8], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x42b208
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x433ee0
call fcn.004062ba
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x43f000
push eax
push ebp
call fcn.004062ba
cmp word [0x43f000], 0x22
mov dword [0x434ee0], 0x400000
mov eax, ebp
jne 0x403490
push 0x22
mov eax, 0x43f002
pop edi
push edi
push eax
call fcn.00405bbc
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x4035c1
push 0x20
pop ebx
cmp ax, bx
jne 0x4034bf
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4034b8
cmp word [ecx], 0x22
jne 0x4034ca
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x40358d
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4034f5
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x4034eb
test ax, ax
jne 0x4034f5
mov dword [0x434fa0], 1
movzx eax, word [0x40a2c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a2be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x40354b
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x40354b
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x403546
test ax, ax
jne 0x40354b
or dword [esp + 0x1c], 4
movzx eax, word [0x40a2b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2b4]
cdq
movzx edx, word [0x40a2b0]
or edi, eax
movzx eax, word [0x40a2b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x40358d
mov eax, dword [ecx]
cmp eax, edi
je 0x4035ac
push ebx
push ecx
call fcn.00405bbc
mov ecx, eax
cmp word [ecx], 0x22
jne 0x40359e
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4034b0
jmp 0x4035bf
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x43f800
call fcn.004062ba
xor ebx, ebx
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov edi, 0x441800
push edi
push 0x400
call esi
call fcn.0040335e
test eax, eax
jne 0x403633
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040335e
test eax, eax
jne 0x403633
push edi
push 0x3fc
call esi
push 0x40a29c
push edi
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push edi
push str.TEMP
call esi
push edi
push 0x40a288
call esi
call fcn.0040335e
test eax, eax
je 0x4036fe
push 0x441000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402edd
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4036fe
cmp dword [0x434f00], ebx
je 0x4036ee
push ebx
push ebp
call fcn.00405bbc
mov esi, eax
cmp esi, ebp
jb 0x4036b8
movzx eax, word [0x40a282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a280]
movzx ecx, word [0x40a27c]
cdq
or ebx, eax
movzx eax, word [0x40a27e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [esi]
cmp edx, ecx
jne 0x4036b0
mov edx, dword [esi + 4]
cmp edx, eax
je 0x4036b6
dec esi
dec esi
cmp esi, ebp
jae 0x4036a3
xor ebx, ebx
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40372a
mov word [esi], bx
add esi, 8
push esi
call fcn.00405c97
test eax, eax
je 0x4036fe
push esi
push 0x43f800
call fcn.004062ba
push esi
push 0x440000
call fcn.004062ba
mov dword [esp + 0x10], ebx
or dword [0x434fac], 0xffffffff
call fcn.004039aa
mov dword [esp + 0x14], eax
call fcn.004038d0
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403834
push 0x200010
push dword [esp + 0x10]
call fcn.00405920
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.0040588b
push 0x40a270
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
cmp esi, ebx
je 0x40374b
push 0x40a26c
push edi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x440800
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x4036fe
cmp esi, ebx
push edi
je 0x403773
call fcn.004057f1
jmp 0x403778
call fcn.0040586e
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x43f800], bx
jne 0x403793
push ebp
push 0x43f800
call fcn.004062ba
push dword [esp + 0x18]
push section..ndata
call fcn.004062ba
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x435800], eax
pop ebp
mov esi, 0x42aa08
mov eax, dword [0x434ef4]
push dword [eax + 0x120]
push esi
call fcn.004062dc
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x40381e
push 1
push esi
push 0x442800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x40381e
push ebx
push esi
call fcn.00406080
mov eax, dword [0x434ef4]
push dword [eax + 0x124]
push esi
call fcn.004062dc
push esi
call fcn.004058a3
cmp eax, ebx
je 0x40381e
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x435800]
dec ebp
jne 0x4037c1
push ebx
push edi
call fcn.00406080
jmp 0x4036fe
cmp dword [0x434f94], ebx
je 0x4038b8
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 0x403888
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
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.00406694
cmp eax, ebx
mov esi, 0x80040002
je 0x4038a4
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4038b1
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4038b8
push 9
call fcn.0040140b
mov eax, dword [0x434fac]
cmp eax, 0xffffffff
je 0x4038c6
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]