Function at 0x401bb4
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 fcn.00406db4
push ebx
call fcn.0040192e
pop ecx
call dword [0x407750]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebx
call dword [0x40774c]
push 8
mov dword [0x422c98], eax
call fcn.004025bc
push ebx
push 0x160
mov dword [0x423d00], eax
lea eax, [esp + 0x38]
push eax
push ebx
push 0x407473
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423500
call fcn.004024d9
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov edi, 0x429000
push edi
call fcn.004024d9
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x429000], 0x22
mov dword [0x423d08], eax
mov eax, edi
jne 0x401c61
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.0040226e
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x401cdb
cmp cl, 0x20
jne 0x401c83
inc eax
cmp byte [eax], 0x20
je 0x401c7d
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x401c93
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x401ccb
inc eax
cmp byte [eax], 0x53
jne 0x401cac
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x401cac
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x401cc2
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x401cc2
or esi, 4
cmp dword [eax - 2], 0x3d442f20
je 0x401ce3
push dword [esp + 0x14]
push eax
call fcn.0040226e
cmp byte [eax], 0x22
jne 0x401cdb
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x401c78
jmp 0x401cf4
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x429400
call fcn.004024d9
mov ebp, 0x42a400
push ebp
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004018fa
test eax, eax
jne 0x401d2e
push 0x3fb
push ebp
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebp
call sub.KERNEL32.dll_lstrcatA
call fcn.004018fa
test eax, eax
je 0x401dac
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push esi
call fcn.0040165f
mov dword [esp + 0x10], eax
cmp eax, ebx
jne 0x401dac
cmp dword [0x423d64], ebx
je 0x401d9c
push ebx
push edi
call fcn.0040226e
mov esi, eax
jmp 0x401d63
cmp dword [esi], 0x3d3f5f20
je 0x401d67
dec esi
cmp esi, edi
jae 0x401d5a
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, edi
jb 0x401dd7
mov byte [esi], bl
add esi, 4
push esi
call fcn.0040267a
test eax, eax
je 0x401dac
push esi
push 0x429400
call fcn.004024d9
push esi
push 0x429800
call fcn.004024d9
mov dword [esp + 0x10], ebx
or dword [0x422c8c], 0xffffffff
call fcn.00404777
mov dword [esp + 0x18], eax
call fcn.00401b72
call dword [0x407748]
cmp dword [esp + 0x10], ebx
je 0x401ea6
push 0x200010
push dword [esp + 0x14]
call fcn.00402208
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push ebp
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x429c00
push esi
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x401dac
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 0x401e15
push esi
push 0x429400
call fcn.004024d9
push dword [esp + 0x1c]
push section..ndata
call fcn.004024d9
push 0x41
pop eax
push 0x1a
mov word [0x424400], ax
pop edi
mov esi, 0x41d1d0
mov eax, dword [0x423d0c]
push dword [eax + 0x120]
push esi
call fcn.00402752
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x401e91
push 1
push esi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x401e91
push ebx
push esi
call fcn.004029ac
mov eax, dword [0x423d0c]
push dword [eax + 0x124]
push esi
call fcn.00402752
push esi
call fcn.004021a7
cmp eax, ebx
je 0x401e91
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec edi
jne 0x401e34
push ebx
push ebp
call fcn.004029ac
jmp 0x401dac
cmp dword [0x422c74], ebx
je 0x401f29
push 3
call fcn.004025bc
push 4
mov ebp, eax
call fcn.004025bc
push 5
mov esi, eax
call fcn.004025bc
mov edi, eax
cmp ebp, ebx
je 0x401f15
cmp esi, ebx
je 0x401f15
cmp edi, ebx
je 0x401f15
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x401f15
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
push ebx
lea eax, [esp + 0x2c]
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 0x401f29
push 9
call fcn.00404b38
mov eax, dword [0x422c8c]
cmp eax, 0xffffffff
je 0x401f37
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
jmp 0x401dd1