Function at 0x40310d
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Shutdown system
Terminate process

Disassembly:
sub esp, 0x180
push ebx
push ebp
push esi
xor ebx, ebx
push edi
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
xor esi, esi
mov byte [esp + 0x14], 0x20
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42ecd8], eax
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403166
push ebx
call fcn.00405f0f
cmp eax, ebx
je 0x403166
push 0xc00
call eax
push 0xd
call fcn.00405f0f
push 0xb
call fcn.00405f0f
mov dword [0x42ec24], eax
push ebx
lea eax, [esp + 0x34]
push 0x160
push eax
push ebx
push 0x429058
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42e420
call fcn.00405b83
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x434000
push eax
push ebp
call fcn.00405b83
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x434000], 0x22
mov dword [0x42ec20], eax
mov eax, ebp
jne 0x4031d2
mov byte [esp + 0x14], 0x22
mov eax, 0x434001
push dword [esp + 0x14]
push eax
call fcn.004056a1
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x40324c
cmp cl, 0x20
jne 0x4031f4
inc eax
cmp byte [eax], 0x20
je 0x4031ee
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403204
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40323c
inc eax
cmp byte [eax], 0x53
jne 0x40321d
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x40321d
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x403233
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403233
or esi, 4
cmp dword [eax - 2], 0x3d442f20
je 0x403254
push dword [esp + 0x14]
push eax
call fcn.004056a1
cmp byte [eax], 0x22
jne 0x40324c
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4031e9
jmp 0x403265
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x434400
call fcn.00405b83
mov edi, 0x435400
push edi
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004030dc
test eax, eax
jne 0x40329f
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.004030dc
test eax, eax
je 0x40331d
push 0x435000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push esi
call fcn.00402c38
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40331d
cmp dword [0x42ec3c], ebx
je 0x40330d
push ebx
push ebp
call fcn.004056a1
mov esi, eax
jmp 0x4032d4
cmp dword [esi], 0x3d3f5f20
je 0x4032d8
dec esi
cmp esi, ebp
jae 0x4032cb
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403348
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405757
test eax, eax
je 0x40331d
push esi
push 0x434400
call fcn.00405b83
push esi
push 0x434800
call fcn.00405b83
mov dword [esp + 0x10], ebx
or dword [0x42eccc], 0xffffffff
call fcn.004035d6
mov dword [esp + 0x18], eax
call fcn.004034fc
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403441
push 0x200010
push dword [esp + 0x14]
call fcn.00405444
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004053cb
push str.nsu
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
cmp esi, ebx
je 0x403369
push 0x409148
push edi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x434c00
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40331d
cmp esi, ebx
push edi
je 0x403391
call fcn.00405331
jmp 0x403396
call fcn.004053ae
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x434400], bl
jne 0x4033b0
push ebp
push 0x434400
call fcn.00405b83
push dword [esp + 0x1c]
push section..ndata
call fcn.00405b83
push 0x1a
mov word [0x42f400], 0x41
pop ebp
mov esi, 0x428c58
mov eax, dword [0x42ec30]
push dword [eax + 0x120]
push esi
call fcn.00405ba5
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40342c
push 1
push esi
push 0x435c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40342c
push ebx
push esi
call fcn.004058d1
mov eax, dword [0x42ec30]
push dword [eax + 0x124]
push esi
call fcn.00405ba5
push esi
call fcn.004053e3
cmp eax, ebx
je 0x40342c
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x42f400]
dec ebp
jne 0x4033cf
push ebx
push edi
call fcn.004058d1
jmp 0x40331d
cmp dword [0x42ecb4], ebx
je 0x4034e4
push 5
call fcn.00405f0f
push 6
mov ebp, eax
call fcn.00405f0f
push 7
mov esi, eax
call fcn.00405f0f
cmp ebp, ebx
mov edi, eax
je 0x4034b4
cmp esi, ebx
je 0x4034b4
cmp edi, ebx
je 0x4034b4
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x4034b4
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push 8
call fcn.00405f0f
cmp eax, ebx
mov esi, 0x80040002
je 0x4034d0
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4034dd
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4034e4
push 9
call fcn.0040140b
mov eax, dword [0x42eccc]
cmp eax, 0xffffffff
je 0x4034f2
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]