Function at 0x4036bb
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 [0x447fe0], eax
je 0x40370d
push ebx
call fcn.00406373
cmp eax, ebx
je 0x40370d
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406305
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x403712
push 0xa
call fcn.00406373
push 8
call fcn.00406373
push 6
mov dword [0x447fe4], eax
call fcn.00406373
cmp eax, ebx
je 0x403757
push 0x1e
call eax
test eax, eax
je 0x403757
or dword [0x447fe0], 0x40000000
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x160
mov dword [0x4480d8], eax
lea eax, [esp + 0x3c]
push eax
push ebx
push 0x408b0f
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x443fe0
call fcn.00405fd3
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov ebp, 0x471000
push ebp
call fcn.00405fd3
cmp byte [0x471000], 0x22
mov dword [0x447fec], 0x400000
mov eax, ebp
jne 0x4037c1
mov byte [esp + 0x14], 0x22
mov eax, 0x471001
push dword [esp + 0x14]
push eax
call fcn.00405bca
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403846
cmp cl, 0x20
jne 0x4037e3
inc eax
cmp byte [eax], 0x20
je 0x4037dd
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4037f3
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403836
inc eax
cmp byte [eax], 0x53
jne 0x403814
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40380a
cmp cl, bl
jne 0x403814
mov dword [0x4480c0], 1
cmp dword [eax], 0x4352434e
jne 0x40382d
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403828
cmp cl, bl
jne 0x40382d
or dword [esp + 0x20], 4
cmp dword [eax - 2], 0x3d442f20
je 0x40384e
push dword [esp + 0x14]
push eax
call fcn.00405bca
cmp byte [eax], 0x22
jne 0x403846
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4037d8
jmp 0x40385f
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x473000
call fcn.00405fd3
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x47b000
push esi
push 0x2000
call edi
call fcn.00403660
test eax, eax
jne 0x4038d1
push 0x1ffb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403660
test eax, eax
jne 0x4038d1
push esi
push 0x1ffc
call edi
push 0x408af8
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 0x408aec
call edi
call fcn.00403660
test eax, eax
je 0x403959
push 0x479000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.0040341b
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403959
cmp dword [0x448044], ebx
je 0x403942
push ebx
push ebp
call fcn.00405bca
mov edi, eax
jmp 0x403909
cmp dword [edi], 0x3d3f5f20
je 0x40390d
dec edi
cmp edi, ebp
jae 0x403900
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403985
mov byte [edi], bl
add edi, 4
push edi
call fcn.004064dc
test eax, eax
je 0x403959
push edi
push 0x473000
call fcn.00405fd3
push edi
push 0x475000
call fcn.00405fd3
mov dword [esp + 0x10], ebx
or dword [0x4480cc], 0xffffffff
call fcn.00405766
push 1
mov dword [esp + 0x1c], eax
call fcn.0040608f
call fcn.00403691
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403a7e
push 0x200010
push dword [esp + 0x10]
call fcn.00405b66
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00406428
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x4039a6
push 0x408ae0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x477000
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403959
cmp edi, ebx
push esi
je 0x4039ce
call fcn.00405a4b
jmp 0x4039d3
call fcn.00405acc
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x473000], bl
jne 0x4039ed
push ebp
push 0x473000
call fcn.00405fd3
push dword [esp + 0x1c]
push section..ndata
call fcn.00405fd3
push 0x1a
mov word [0x44b000], 0x41
pop ebp
mov edi, 0x4281a0
mov eax, dword [0x447ff0]
push dword [eax + 0x120]
push edi
call fcn.0040655e
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403a69
push 1
push edi
push 0x47f000
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403a69
push ebx
push edi
call fcn.0040691b
mov eax, dword [0x447ff0]
push dword [eax + 0x124]
push edi
call fcn.0040655e
push edi
call fcn.00405ae9
cmp eax, ebx
je 0x403a69
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x44b000]
dec ebp
jne 0x403a0c
push ebx
push esi
call fcn.0040691b
jmp 0x403959
cmp dword [0x4480b4], ebx
je 0x403b00
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
push 2
pop edi
je 0x403ad1
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push ebx
push ebx
push ebx
lea eax, [esp + 0x2c]
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.00406373
cmp eax, ebx
mov esi, 0x80040002
je 0x403aed
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403af9
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403b00
push 9
call fcn.00401411
mov eax, dword [0x4480cc]
cmp eax, 0xffffffff
je 0x403b0e
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
jmp 0x40397f