Function at 0x404392
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:
push ebp
mov ebp, esp
push edi
push esi
push ebx
sub esp, 0x30c
mov dword [esp], 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push esi
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x43bae0], eax
je 0x4043dd
mov dword [esp], 0
call fcn.00408de1
test eax, eax
push ebx
je 0x4043dd
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
cmp byte [ebx], 0
je 0x404400
mov dword [esp], ebx
call fcn.00408d51
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
jmp 0x4043e2
mov dword [esp], 0xa
call fcn.00408de1
push ebx
mov dword [esp], 8
call fcn.00408de1
push esi
mov dword [0x43bae4], eax
mov dword [esp], 6
call fcn.00408de1
test eax, eax
push edi
je 0x404448
mov dword [esp], 0x1e
call eax
test eax, eax
push ecx
je 0x404448
or dword [0x43bae0], 0x40000000
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
mov dword [esp], 0
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x43ba58], eax
lea eax, [ebp - 0x2cc]
push edi
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0x2b4
mov dword [esp + 8], eax
mov dword [esp + 4], 0
mov dword [esp], 0x40c43a
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x43bb00
call fcn.004082ae
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov edi, dword [0x40c8f4]
mov dword [esp + 4], eax
add edi, 0xa000
mov dword [esp], edi
mov dword [ebp - 0x2dc], edi
call fcn.004082ae
push eax
push eax
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x43baec], eax
mov eax, dword [0x40c8f4]
push edx
movzx eax, word [eax + 0xa000]
cmp ax, 0x22
jne 0x404502
mov edx, dword [0x40c8f4]
add edx, 0xa002
jmp 0x40450d
mov edx, dword [ebp - 0x2dc]
mov eax, 0x20
mov dword [esp], edx
mov dword [esp + 4], eax
xor edi, edi
call fcn.00407b3d
push ebx
push ebx
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextW]
movzx ecx, word [0x40c4be]
mov dword [ebp - 0x2e0], eax
movzx eax, word [0x40c4bc]
movzx edx, word [str.NCRC]
push esi
movzx esi, word [0x40c4c4]
shl ecx, 0x10
or ecx, eax
movzx eax, word [0x40c4ba]
shl esi, 0x10
shl eax, 0x10
or eax, edx
cdq
mov ebx, eax
movzx eax, word [0x40c4c6]
or ecx, edx
mov dword [ebp - 0x2ec], ecx
movzx ecx, word [0x40c4c8]
shl ecx, 0x10
or ecx, eax
movzx eax, word [str.__D]
or esi, eax
mov eax, esi
cdq
mov eax, dword [ebp - 0x2e0]
or ecx, edx
mov dword [ebp - 0x2f0], ecx
cmp word [eax], 0
je 0x40465f
mov cx, word [eax]
cmp cx, 0x20
jne 0x4045ad
add eax, 2
jmp 0x40459f
cmp cx, 0x22
mov edx, 0x20
jne 0x4045c0
add eax, 2
mov edx, 0x22
cmp word [eax], 0x2f
jne 0x40463f
cmp word [eax + 2], 0x53
lea ecx, [eax + 2]
mov dword [ebp - 0x2e8], ecx
jne 0x4045e8
test word [eax + 4], 0xffdf
jne 0x4045e8
mov dword [0x43ba40], 1
mov ecx, dword [ebp - 0x2ec]
cmp dword [eax + 6], ecx
jne 0x404606
cmp dword [eax + 2], ebx
jne 0x404606
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove edi, ecx
mov ecx, dword [ebp - 0x2f0]
cmp dword [eax + 2], ecx
jne 0x404639
cmp dword [eax - 2], esi
jne 0x404639
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
mov eax, dword [0x40c8f4]
add eax, 0xa800
mov dword [esp], eax
call fcn.004082ae
push ecx
push ecx
jmp 0x40465f
mov eax, dword [ebp - 0x2e8]
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.00407b3d
push edx
push edx
cmp word [eax], 0x22
jne 0x404595
add eax, 2
jmp 0x404595
mov eax, dword [0x40c8f4]
mov dword [esp], 0x400
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
lea ebx, [eax + 0xc800]
mov dword [esp + 4], ebx
call esi
push ecx
push ecx
call fcn.004042f0
test eax, eax
je 0x4046b6
mov eax, dword [0x40c8f4]
add eax, 0xc000
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
mov dword [esp], edi
xor edi, edi
call fcn.00403fcf
test eax, eax
push edx
mov esi, eax
jne 0x4049d8
jmp 0x404740
mov dword [esp + 4], 0x3fb
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push eax
push eax
mov dword [esp + 4], str.Temp
mov dword [esp], ebx
call fcn.004082e0
push eax
push eax
call fcn.004042f0
test eax, eax
jne 0x404688
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40c45e
mov dword [esp], ebx
call fcn.004082e0
push eax
push eax
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
mov dword [esp + 4], ebx
mov dword [esp], str.TEMP
call esi
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], 0x40c470
call esi
push eax
push eax
call fcn.004042f0
test eax, eax
jne 0x404688
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x4049d6
cmp dword [0x43bac8], 0
je 0x4049c3
mov eax, dword [ebp - 0x2dc]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.00407b3d
movzx edx, word [0x40c4d2]
push ecx
push ecx
movzx ecx, word [0x40c4d0]
movzx edi, word [0x40c4ce]
shl edx, 0x10
or ecx, edx
movzx edx, word [0x40c4cc]
shl edi, 0x10
or edi, edx
mov edx, edi
mov dword [ebp - 0x2e8], edi
sar edx, 0x1f
mov dword [ebp - 0x2e4], edx
mov edx, dword [ebp - 0x2e4]
or edx, ecx
cmp dword [ebp - 0x2dc], eax
ja 0x40480e
cmp dword [eax + 4], edx
je 0x4047b6
sub eax, 2
jmp 0x4047a4
cmp dword [eax], edi
jne 0x4047b1
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.00408a18
test eax, eax
push edx
jne 0x4047d9
mov esi, str.Error_launching_installer
jmp 0x4049d6
mov eax, dword [0x40c8f4]
mov dword [esp + 4], ebx
add eax, 0xa800
mov dword [esp], eax
call fcn.004082ae
mov eax, dword [0x40c8f4]
push edi
push edi
add eax, 0xb000
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.004082ae
push eax
push eax
jmp 0x4049c3
call fcn.00408e2d
mov dword [esp + 4], str.nsu
mov edi, eax
mov dword [esp], ebx
call fcn.004082e0
test edi, edi
push esi
push esi
je 0x40483d
mov dword [esp + 4], 0x40c482
mov dword [esp], ebx
call fcn.004082e0
push ecx
push ecx
mov dword [esp + 4], str..tmp
mov dword [esp], ebx
call fcn.004082e0
push eax
push eax
mov eax, dword [0x40c8f4]
mov dword [esp], ebx
lea esi, [eax + 0xb800]
mov dword [esp + 4], esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
push edx
push edx
je 0x4047cf
test edi, edi
mov dword [esp], ebx
je 0x40487f
call fcn.00407938
jmp 0x404884
call fcn.004079cc
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push eax
mov eax, dword [0x40c8f4]
cmp word [eax + 0xa800], 0
jne 0x4048b1
add eax, 0xa800
mov dword [esp + 4], esi
mov dword [esp], eax
call fcn.004082ae
push eax
push eax
mov eax, dword [ebp - 0x2e0]
mov esi, str.Error_launching_installer
mov dword [esp + 4], eax
mov eax, dword [0x40c8f4]
mov dword [esp], eax
call fcn.004082ae
push eax
push eax
movzx eax, word [0x40c4d8]
movzx edx, word [0x40c4d6]
mov edi, dword [0x40c8f4]
shl eax, 0x10
or eax, edx
mov dword [edi + 0x800], eax
mov edi, 0x1a
mov eax, dword [0x43ba60]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x433480
mov dword [esp + 4], eax
call fcn.00408411
push ecx
push ecx
mov dword [esp], 0x433480
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test esi, esi
push eax
je 0x40499c
mov eax, dword [0x40c8f4]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x433480
add eax, 0xd800
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x40499c
mov dword [esp + 4], 0
mov dword [esp], 0x433480
call fcn.0040899b
push eax
push eax
mov eax, dword [0x43ba60]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x433480
mov dword [esp + 4], eax
call fcn.00408411
push eax
push eax
mov dword [esp], 0x433480
call fcn.004079fa
test eax, eax
push edx
je 0x40499c
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40c8f4]
inc word [eax + 0x800]
dec edi
jne 0x4048f3
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.0040899b
push edi
push edi
jmp 0x4049d6
mov dword [0x43ba4c], 0xffffffff
call fcn.00406358
mov edi, eax
jmp 0x4049d8
xor edi, edi
call fcn.0040434b
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x404a0b
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.00407ad1
push esi
push esi
mov dword [esp], 2
jmp 0x404b2b
cmp dword [0x43ba34], 0
je 0x404b1d
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
lea edx, [ebp - 0x2d0]
mov dword [esp + 4], 0x28
mov dword [esp], eax
mov dword [esp + 8], edx
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
sub esp, 0xc
test eax, eax
je 0x404ab2
lea eax, [ebp - 0x2c8]
mov dword [esp + 4], str.SeShutdownPrivilege
mov dword [esp], 0
lea esi, [ebp - 0x2cc]
mov dword [esp + 8], eax
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
mov eax, dword [ebp - 0x2d0]
sub esp, 0xc
mov dword [ebp - 0x2cc], 1
mov dword [ebp - 0x2c0], 2
mov dword [esp + 0x14], 0
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0
mov dword [esp + 8], esi
mov dword [esp + 4], 0
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
sub esp, 0x18
mov dword [esp], 4
call fcn.00408de1
test eax, eax
push ecx
jne 0x404ae0
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
push edx
push edx
je 0x404b10
jmp 0x404b1d
mov dword [esp + 0x10], 0x80040002
mov dword [esp + 0xc], 0x25
mov dword [esp + 8], 0
mov dword [esp + 4], 0
mov dword [esp], 0
call eax
sub esp, 0x14
test eax, eax
jne 0x404ac3
mov dword [esp], 9
call fcn.00403b26
push eax
mov eax, dword [0x43ba4c]
cmp eax, 0xffffffff
cmovne edi, eax
mov dword [esp], edi
call ebx
nop
nop
nop