Function at 0x4030fb
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, 0x184
push ebx
push ebp
push esi
push edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x20], ebx
mov dword [esp + 0x14], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
mov byte [esp + 0x18], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403144
push ebx
call fcn.00405f28
cmp eax, ebx
je 0x403144
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00405eba
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x403149
push 0xd
call fcn.00405f28
push 0xb
call fcn.00405f28
mov dword [0x423f44], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x423ff8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41f4f0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423740
call fcn.00405b98
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42a000
push eax
push ebp
call fcn.00405b98
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42a000], 0x22
mov dword [0x423f40], eax
mov eax, ebp
jne 0x4031dc
mov byte [esp + 0x14], 0x22
mov eax, 0x42a001
push dword [esp + 0x14]
push eax
call fcn.004056b6
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x20], eax
jmp 0x40325a
cmp cl, 0x20
jne 0x4031fe
inc eax
cmp byte [eax], 0x20
je 0x4031f8
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x40320e
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40324a
inc eax
cmp byte [eax], 0x53
jne 0x403229
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x403229
or dword [esp + 0x18], 2
cmp dword [eax], 0x4352434e
jne 0x403241
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403241
or dword [esp + 0x18], 4
cmp dword [eax - 2], 0x3d442f20
je 0x403262
push dword [esp + 0x14]
push eax
call fcn.004056b6
cmp byte [eax], 0x22
jne 0x40325a
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4031f3
jmp 0x403273
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x42a400
call fcn.00405b98
mov edi, 0x42b400
push edi
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004030ca
test eax, eax
jne 0x4032b1
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.004030ca
test eax, eax
je 0x403332
push 0x42b000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x18]
call fcn.00402c55
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403332
cmp dword [0x423f5c], ebx
je 0x403322
push ebx
push ebp
call fcn.004056b6
mov esi, eax
jmp 0x4032e9
cmp dword [esi], 0x3d3f5f20
je 0x4032ed
dec esi
cmp esi, ebp
jae 0x4032e0
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40335d
mov byte [esi], bl
add esi, 4
push esi
call fcn.0040576c
test eax, eax
je 0x403332
push esi
push 0x42a400
call fcn.00405b98
push esi
push 0x42a800
call fcn.00405b98
mov dword [esp + 0x10], ebx
or dword [0x423fec], 0xffffffff
call fcn.004035eb
mov dword [esp + 0x1c], eax
call fcn.00403511
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403456
push 0x200010
push dword [esp + 0x14]
call fcn.00405459
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004053e0
push str.nsu
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
cmp esi, ebx
je 0x40337e
push 0x409148
push edi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x42ac00
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403332
cmp esi, ebx
push edi
je 0x4033a6
call fcn.00405346
jmp 0x4033ab
call fcn.004053c3
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42a400], bl
jne 0x4033c5
push ebp
push 0x42a400
call fcn.00405b98
push dword [esp + 0x20]
push section..ndata
call fcn.00405b98
push 0x1a
mov word [0x425400], 0x41
pop ebp
mov esi, 0x41f0f0
mov eax, dword [0x423f50]
push dword [eax + 0x120]
push esi
call fcn.00405bba
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403441
push 1
push esi
push 0x42bc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403441
push ebx
push esi
call fcn.004058e6
mov eax, dword [0x423f50]
push dword [eax + 0x124]
push esi
call fcn.00405bba
push esi
call fcn.004053f8
cmp eax, ebx
je 0x403441
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x425400]
dec ebp
jne 0x4033e4
push ebx
push edi
call fcn.004058e6
jmp 0x403332
cmp dword [0x423fd4], ebx
je 0x4034f9
push 5
call fcn.00405f28
push 6
mov ebp, eax
call fcn.00405f28
push 7
mov esi, eax
call fcn.00405f28
cmp ebp, ebx
mov edi, eax
je 0x4034c9
cmp esi, ebx
je 0x4034c9
cmp edi, ebx
je 0x4034c9
lea eax, [esp + 0x20]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x4034c9
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 + 0x34]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push 8
call fcn.00405f28
cmp eax, ebx
mov esi, 0x80040002
je 0x4034e5
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4034f2
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4034f9
push 9
call fcn.0040140b
mov eax, dword [0x423fec]
cmp eax, 0xffffffff
je 0x403507
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ExitProcess]