Function at 0x403461
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]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42474c], eax
je 0x4034b3
push ebx
call fcn.00406631
cmp eax, ebx
je 0x4034b3
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004065c3
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x4034b8
push 0xb
call fcn.00406631
push 9
call fcn.00406631
push 7
mov dword [0x424744], eax
call fcn.00406631
cmp eax, ebx
je 0x4034fa
push 0x1e
call eax
test eax, eax
je 0x4034fa
or byte [0x42474f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x424818], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41fd10
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423f40
call fcn.00406228
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42a000
push eax
push ebp
call fcn.00406228
cmp byte [0x42a000], 0x22
mov dword [0x424740], 0x400000
mov eax, ebp
jne 0x403564
mov byte [esp + 0x14], 0x22
mov eax, 0x42a001
push dword [esp + 0x14]
push eax
call fcn.00405beb
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x40363e
cmp cl, 0x20
jne 0x403589
inc eax
cmp byte [eax], 0x20
je 0x403583
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403599
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40362e
inc eax
cmp byte [eax], 0x53
jne 0x4035be
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4035b4
cmp cl, bl
jne 0x4035be
mov dword [0x424800], 1
movsx ecx, byte [0x40a1e7]
movsx edx, byte [0x40a1e6]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1e5]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4035fe
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4035f9
cmp cl, bl
jne 0x4035fe
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a1df]
movsx edx, byte [0x40a1de]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1dd]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x40364a
push dword [esp + 0x14]
push eax
call fcn.00405beb
cmp byte [eax], 0x22
jne 0x40363e
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x40357e
jmp 0x40365b
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x42a400
call fcn.00406228
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42b400
push esi
push 0x400
call edi
call fcn.00403430
test eax, eax
jne 0x4036cd
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403430
test eax, eax
jne 0x4036cd
push esi
push 0x3fc
call edi
push 0x40a1d0
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 0x40a1c4
call edi
call fcn.00403430
test eax, eax
je 0x40377b
push 0x42b000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402ef1
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40377b
cmp dword [0x424760], ebx
je 0x40376b
push ebx
push ebp
call fcn.00405beb
mov edi, eax
cmp edi, ebp
jb 0x403736
movsx eax, byte [0x40a1bf]
movsx ecx, byte [0x40a1be]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bd]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bc]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x403736
dec edi
cmp edi, ebp
jae 0x40372d
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4037a7
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405cae
test eax, eax
je 0x40377b
push edi
push 0x42a400
call fcn.00406228
push edi
push 0x42a800
call fcn.00406228
mov dword [esp + 0x10], ebx
or dword [0x42480c], 0xffffffff
call fcn.00403a3b
mov dword [esp + 0x18], eax
call fcn.00403949
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4038af
push 0x200010
push dword [esp + 0x10]
call fcn.00405944
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004058af
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x4037c8
push 0x40a1b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x42ac00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40377b
cmp edi, ebx
push esi
je 0x4037f0
call fcn.00405815
jmp 0x4037f5
call fcn.00405892
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42a400], bl
jne 0x40380f
push ebp
push 0x42a400
call fcn.00406228
push dword [esp + 0x1c]
push section..ndata
call fcn.00406228
movsx cx, byte [0x40a1a4]
xor eax, eax
push 0x1a
mov ah, byte [0x40a1a5]
pop ebp
or eax, ecx
mov edi, 0x41f910
mov word [0x425400], ax
mov eax, dword [0x424754]
push dword [eax + 0x120]
push edi
call fcn.004062bb
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40389a
push 1
push edi
push 0x42bc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40389a
push ebx
push edi
call fcn.00406007
mov eax, dword [0x424754]
push dword [eax + 0x124]
push edi
call fcn.004062bb
push edi
call fcn.004058c7
cmp eax, ebx
je 0x40389a
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x425400]
dec ebp
jne 0x40383d
push ebx
push esi
call fcn.00406007
jmp 0x40377b
cmp dword [0x4247f4], ebx
je 0x403931
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 0x403902
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.00406631
cmp eax, ebx
mov esi, 0x80040002
je 0x40391e
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x40392a
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403931
push 9
call fcn.0040140b
mov eax, dword [0x42480c]
cmp eax, 0xffffffff
je 0x40393f
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]