Function at 0x4030d9
Capabilities:
Accept command line arguments
Check os version
Copy file
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 esi
push edi
xor ebx, ebx
push 0x8001
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.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403121
push ebx
call fcn.00406092
cmp eax, ebx
je 0x403121
push 0xc00
call eax
push ebp
push str.UXTHEME
call fcn.00406028
push str.USERENV
call fcn.00406028
push str.SETUPAPI
call fcn.00406028
push 9
call fcn.00406092
push 7
call fcn.00406092
mov dword [0x423724], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4237d8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41ece0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x422f20
call fcn.00405cfd
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x429000
push eax
push ebp
call fcn.00405cfd
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x429000], 0x22
mov dword [0x423720], eax
mov eax, ebp
jne 0x4031be
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.0040579a
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403298
cmp cl, 0x20
jne 0x4031e3
inc eax
cmp byte [eax], 0x20
je 0x4031dd
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4031f3
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403288
inc eax
cmp byte [eax], 0x53
jne 0x403218
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40320e
cmp cl, bl
jne 0x403218
mov dword [0x4237c0], 1
movsx ecx, byte [0x409183]
movsx edx, byte [0x409182]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409181]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x403258
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403253
cmp cl, bl
jne 0x403258
or dword [esp + 0x20], 4
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.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x4032a4
push dword [esp + 0x14]
push eax
call fcn.0040579a
cmp byte [eax], 0x22
jne 0x403298
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4031d8
jmp 0x4032b5
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x429400
call fcn.00405cfd
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42a400
push esi
push 0x400
call edi
call fcn.004030a8
test eax, eax
jne 0x403327
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004030a8
test eax, eax
jne 0x403327
push esi
push 0x3fc
call edi
push 0x40916c
push esi
call sub.KERNEL32.dll_lstrcatA
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push esi
push str.TEMP
call edi
push esi
push 0x409160
call edi
call fcn.004030a8
test eax, eax
je 0x4033d5
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402c66
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4033d5
cmp dword [0x42373c], ebx
je 0x4033c5
push ebx
push ebp
call fcn.0040579a
mov edi, eax
cmp edi, ebp
jb 0x403390
movsx eax, byte [0x40915b]
movsx ecx, byte [0x40915a]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x409159]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x403390
dec edi
cmp edi, ebp
jae 0x403387
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403401
mov byte [edi], bl
add edi, 4
push edi
call fcn.0040585d
test eax, eax
je 0x4033d5
push edi
push 0x429400
call fcn.00405cfd
push edi
push 0x429800
call fcn.00405cfd
mov dword [esp + 0x10], ebx
or dword [0x4237cc], 0xffffffff
call fcn.0040367d
mov dword [esp + 0x18], eax
call fcn.004035a3
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403509
push 0x200010
push dword [esp + 0x10]
call fcn.004054f3
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405476
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403422
push 0x40914c
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x429c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x4033d5
cmp edi, ebx
push esi
je 0x40344a
call fcn.004053dc
jmp 0x40344f
call fcn.00405459
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x429400], bl
jne 0x403469
push ebp
push 0x429400
call fcn.00405cfd
push dword [esp + 0x1c]
push section..ndata
call fcn.00405cfd
movsx cx, byte [0x409140]
xor eax, eax
push 0x1a
mov ah, byte [0x409141]
pop ebp
or eax, ecx
mov edi, 0x41e8e0
mov word [0x424400], ax
mov eax, dword [0x423730]
push dword [eax + 0x120]
push edi
call fcn.00405d1f
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x4034f4
push 1
push edi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4034f4
push ebx
push edi
call fcn.00405bb8
mov eax, dword [0x423730]
push dword [eax + 0x124]
push edi
call fcn.00405d1f
push edi
call fcn.0040548e
cmp eax, ebx
je 0x4034f4
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec ebp
jne 0x403497
push ebx
push esi
call fcn.00405bb8
jmp 0x4033d5
cmp dword [0x4237b4], ebx
je 0x40358b
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
push 2
test eax, eax
pop edi
je 0x40355c
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x2c]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], edi
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406092
cmp eax, ebx
mov esi, 0x80040002
je 0x403578
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403584
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40358b
push 9
call fcn.0040140b
mov eax, dword [0x4237cc]
cmp eax, 0xffffffff
je 0x403599
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]