Function at 0x4030b6
Capabilities:
Accept command line arguments
Copy file
Create directory
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 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.
mov dword [esp + 0x20], ebx
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]
push 8
mov dword [0x423778], eax
call fcn.00405e90
mov dword [0x4236c4], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41ec80
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x422ec0
call fcn.00405b65
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x429000
push eax
push ebp
call fcn.00405b65
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x429000], 0x22
mov dword [0x4236c0], eax
mov eax, ebp
jne 0x403159
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.00405620
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403233
cmp cl, 0x20
jne 0x40317e
inc eax
cmp byte [eax], 0x20
je 0x403178
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x40318e
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403223
inc eax
cmp byte [eax], 0x53
jne 0x4031b3
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4031a9
cmp cl, bl
jne 0x4031b3
mov dword [0x423760], 1
movsx ecx, byte [0x40917b]
movsx edx, byte [0x40917a]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409179]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4031f3
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4031ee
cmp cl, bl
jne 0x4031f3
or dword [esp + 0x20], 4
movsx ecx, byte [0x409173]
movsx edx, byte [0x409172]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409171]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x40323f
push dword [esp + 0x14]
push eax
call fcn.00405620
cmp byte [eax], 0x22
jne 0x403233
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403173
jmp 0x403250
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x429400
call fcn.00405b65
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov edi, 0x42a400
push edi
push 0x400
call esi
call fcn.00403082
test eax, eax
jne 0x4032c2
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403082
test eax, eax
jne 0x4032c2
push edi
push 0x3fc
call esi
push 0x409164
push edi
call sub.KERNEL32.dll_lstrcatA
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push edi
push str.TEMP
call esi
push edi
push 0x409158
call esi
call fcn.00403082
test eax, eax
je 0x403370
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402c29
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403370
cmp dword [0x4236dc], ebx
je 0x403360
push ebx
push ebp
call fcn.00405620
mov esi, eax
cmp esi, ebp
jb 0x40332b
movsx eax, byte [0x409153]
movsx ecx, byte [0x409152]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x409151]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [esi], eax
je 0x40332b
dec esi
cmp esi, ebp
jae 0x403322
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40339b
mov byte [esi], bl
add esi, 4
push esi
call fcn.004056e3
test eax, eax
je 0x403370
push esi
push 0x429400
call fcn.00405b65
push esi
push 0x429800
call fcn.00405b65
mov dword [esp + 0x10], ebx
or dword [0x42376c], 0xffffffff
call fcn.004035ee
mov dword [esp + 0x18], eax
call fcn.00403514
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403479
push 0x200010
push dword [esp + 0x14]
call fcn.00405379
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x429c00
push esi
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403370
push ebx
push edi
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x429400], bl
jne 0x4033d9
push esi
push 0x429400
call fcn.00405b65
push dword [esp + 0x1c]
push section..ndata
call fcn.00405b65
movsx cx, byte [0x409140]
xor eax, eax
push 0x1a
mov ah, byte [0x409141]
pop ebp
or eax, ecx
mov esi, 0x41e880
mov word [0x424400], ax
mov eax, dword [0x4236d0]
push dword [eax + 0x120]
push esi
call fcn.00405b87
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403464
push 1
push esi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403464
push ebx
push esi
call fcn.00405a19
mov eax, dword [0x4236d0]
push dword [eax + 0x124]
push esi
call fcn.00405b87
push esi
call fcn.00405318
cmp eax, ebx
je 0x403464
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec ebp
jne 0x403407
push ebx
push edi
call fcn.00405a19
jmp 0x403370
cmp dword [0x423754], ebx
je 0x4034fc
push 3
call fcn.00405e90
push 4
mov ebp, eax
call fcn.00405e90
push 5
mov esi, eax
call fcn.00405e90
cmp ebp, ebx
mov edi, eax
je 0x4034e8
cmp esi, ebx
je 0x4034e8
cmp edi, ebx
je 0x4034e8
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x4034e8
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x2c]
push ebx
push eax
push ebx
push dword [esp + 0x30]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4034fc
push 9
call fcn.0040140b
mov eax, dword [0x42376c]
cmp eax, 0xffffffff
je 0x40350a
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]