Function at 0x403180
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 0x4031c8
push ebx
call fcn.00406139
cmp eax, ebx
je 0x4031c8
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004060cb
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x4031cd
push ebp
push 9
call fcn.00406139
push 7
call fcn.00406139
mov dword [0x7a1f44], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a1ff8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x79d500
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x7a1740
call fcn.00405da0
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x7a8000
push eax
push ebp
call fcn.00405da0
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x7a8000], 0x22
mov dword [0x7a1f40], eax
mov eax, ebp
jne 0x403261
mov byte [esp + 0x14], 0x22
mov eax, 0x7a8001
push dword [esp + 0x14]
push eax
call fcn.0040583d
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x40333b
cmp cl, 0x20
jne 0x403286
inc eax
cmp byte [eax], 0x20
je 0x403280
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403296
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40332b
inc eax
cmp byte [eax], 0x53
jne 0x4032bb
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4032b1
cmp cl, bl
jne 0x4032bb
mov dword [0x7a1fe0], 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 0x4032fb
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4032f6
cmp cl, bl
jne 0x4032fb
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 0x403347
push dword [esp + 0x14]
push eax
call fcn.0040583d
cmp byte [eax], 0x22
jne 0x40333b
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x40327b
jmp 0x403358
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x7a8400
call fcn.00405da0
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x7a9400
push esi
push 0x400
call edi
call fcn.0040314f
test eax, eax
jne 0x4033ca
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.0040314f
test eax, eax
jne 0x4033ca
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.0040314f
test eax, eax
je 0x403478
push 0x7a9000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402cfa
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403478
cmp dword [0x7a1f5c], ebx
je 0x403468
push ebx
push ebp
call fcn.0040583d
mov edi, eax
cmp edi, ebp
jb 0x403433
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 [0x409158]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x403433
dec edi
cmp edi, ebp
jae 0x40342a
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4034a4
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405900
test eax, eax
je 0x403478
push edi
push 0x7a8400
call fcn.00405da0
push edi
push 0x7a8800
call fcn.00405da0
mov dword [esp + 0x10], ebx
or dword [0x7a1fec], 0xffffffff
call fcn.00403720
mov dword [esp + 0x18], eax
call fcn.00403646
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4035ac
push 0x200010
push dword [esp + 0x10]
call fcn.00405596
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405519
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x4034c5
push 0x40914c
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x7a8c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403478
cmp edi, ebx
push esi
je 0x4034ed
call fcn.0040547f
jmp 0x4034f2
call fcn.004054fc
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x7a8400], bl
jne 0x40350c
push ebp
push 0x7a8400
call fcn.00405da0
push dword [esp + 0x1c]
push section..ndata
call fcn.00405da0
movsx cx, byte [0x409140]
xor eax, eax
push 0x1a
mov ah, byte [0x409141]
pop ebp
or eax, ecx
mov edi, 0x79d100
mov word [0x7a3400], ax
mov eax, dword [0x7a1f50]
push dword [eax + 0x120]
push edi
call fcn.00405dc2
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403597
push 1
push edi
push 0x7a9c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403597
push ebx
push edi
call fcn.00405c5b
mov eax, dword [0x7a1f50]
push dword [eax + 0x124]
push edi
call fcn.00405dc2
push edi
call fcn.00405531
cmp eax, ebx
je 0x403597
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x7a3400]
dec ebp
jne 0x40353a
push ebx
push esi
call fcn.00405c5b
jmp 0x403478
cmp dword [0x7a1fd4], ebx
je 0x40362e
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 0x4035ff
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.00406139
cmp eax, ebx
mov esi, 0x80040002
je 0x40361b
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403627
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40362e
push 9
call fcn.0040140b
mov eax, dword [0x7a1fec]
cmp eax, 0xffffffff
je 0x40363c
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]