Function at 0x403121
Capabilities:
Accept command line arguments
Copy file
Create directory
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 RegEnumValueA
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push 8
mov dword [0x423f18], eax
call fcn.00405e06
mov dword [0x423e64], eax
push ebx
lea eax, [esp + 0x34]
push 0x160
push eax
push ebx
push 0x41f424
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423660
call fcn.00405aba
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov edi, 0x429000
push eax
push edi
call fcn.00405aba
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x429000], 0x22
mov dword [0x423e60], eax
mov eax, edi
jne 0x4031c2
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.004055ce
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
mov cl, byte [eax]
cmp cl, bl
je 0x403253
cmp cl, 0x20
jne 0x4031e8
inc eax
cmp byte [eax], 0x20
je 0x4031e2
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4031f8
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403230
inc eax
cmp byte [eax], 0x53
jne 0x403211
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x403211
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x403227
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403227
or esi, 4
cmp dword [eax - 2], 0x3d442f20
je 0x403242
push dword [esp + 0x14]
push eax
call fcn.004055ce
cmp byte [eax], 0x22
jne 0x4031d7
inc eax
jmp 0x4031d7
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x429400
call fcn.00405aba
mov ebp, 0x42a400
push ebp
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004030ed
test eax, eax
jne 0x40328d
push 0x3fb
push ebp
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebp
call fcn.00405add
call fcn.004030ed
test eax, eax
je 0x40330b
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push esi
call fcn.00402c74
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40330b
cmp dword [0x423e7c], ebx
je 0x4032fb
push ebx
push edi
call fcn.004055ce
mov esi, eax
cmp esi, edi
jb 0x4032c6
cmp dword [esi], 0x3d3f5f20
je 0x4032c6
dec esi
jmp 0x4032b7
cmp esi, edi
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403336
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405686
test eax, eax
je 0x40330b
push esi
push 0x429400
call fcn.00405aba
push esi
push 0x429800
call fcn.00405aba
mov dword [esp + 0x10], ebx
or dword [0x423f0c], 0xffffffff
call fcn.0040357e
mov dword [esp + 0x18], eax
call fcn.004034a0
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403405
push 0x200010
push dword [esp + 0x14]
call fcn.0040535f
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push ebp
call fcn.00405add
mov esi, 0x429c00
push esi
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40330b
push ebx
push ebp
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x429400], bl
jne 0x403374
push esi
push 0x429400
call fcn.00405aba
push dword [esp + 0x1c]
push 0x424000
call fcn.00405aba
push 0x1a
mov word [0x424400], 0x41
pop edi
mov esi, 0x41f024
mov eax, dword [0x423e70]
push dword [eax + 0x120]
push esi
call fcn.00405aee
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x4033f0
push 1
push esi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4033f0
push ebx
push esi
call fcn.00405807
mov eax, dword [0x423e70]
push dword [eax + 0x124]
push esi
call fcn.00405aee
push esi
call fcn.004052ef
cmp eax, ebx
je 0x4033f0
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec edi
jne 0x403393
push ebx
push ebp
call fcn.00405807
jmp 0x40330b
cmp dword [0x423ef4], ebx
je 0x403488
push 3
call fcn.00405e06
push 4
mov ebp, eax
call fcn.00405e06
push 5
mov esi, eax
call fcn.00405e06
cmp ebp, ebx
mov edi, eax
je 0x403474
cmp esi, ebx
je 0x403474
cmp edi, ebx
je 0x403474
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x403474
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 ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403488
push 9
call fcn.00401430
mov eax, dword [0x423f0c]
cmp eax, 0xffffffff
je 0x403496
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]