Function at 0x40454c
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 [0x430de0], eax
je 0x404597
mov dword [esp], 0
call fcn.00408f99
test eax, eax
push ebx
je 0x404597
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
cmp byte [ebx], 0
je 0x4045ba
mov dword [esp], ebx
call fcn.00408f09
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
jmp 0x40459c
mov dword [esp], 0xa
call fcn.00408f99
push ebx
mov dword [esp], 8
call fcn.00408f99
push esi
mov dword [0x430de4], eax
mov dword [esp], 6
call fcn.00408f99
test eax, eax
push edi
je 0x404602
mov dword [esp], 0x1e
call eax
test eax, eax
push ecx
je 0x404602
or dword [0x430de0], 0x40000000
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
mov dword [esp], 0
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x430d58], 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], 0x40c4da
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x430e00
call fcn.00408466
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov edi, dword [0x40c994]
mov dword [esp + 4], eax
add edi, 0xa000
mov dword [esp], edi
mov dword [ebp - 0x2dc], edi
call fcn.00408466
push eax
push eax
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x430dec], eax
mov eax, dword [0x40c994]
push edx
movzx eax, word [eax + 0xa000]
cmp ax, 0x22
jne 0x4046bc
mov edx, dword [0x40c994]
add edx, 0xa002
jmp 0x4046c7
mov edx, dword [ebp - 0x2dc]
mov eax, 0x20
mov dword [esp], edx
mov dword [esp + 4], eax
xor edi, edi
call fcn.00407cf5
push ebx
push ebx
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextW]
movzx ecx, word [0x40c55e]
mov dword [ebp - 0x2e0], eax
movzx eax, word [0x40c55c]
movzx edx, word [str.NCRC]
push esi
movzx esi, word [0x40c564]
shl ecx, 0x10
or ecx, eax
movzx eax, word [0x40c55a]
shl esi, 0x10
shl eax, 0x10
or eax, edx
cdq
mov ebx, eax
movzx eax, word [0x40c566]
or ecx, edx
mov dword [ebp - 0x2ec], ecx
movzx ecx, word [0x40c568]
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 0x404819
mov cx, word [eax]
cmp cx, 0x20
jne 0x404767
add eax, 2
jmp 0x404759
cmp cx, 0x22
mov edx, 0x20
jne 0x40477a
add eax, 2
mov edx, 0x22
cmp word [eax], 0x2f
jne 0x4047f9
cmp word [eax + 2], 0x53
lea ecx, [eax + 2]
mov dword [ebp - 0x2e8], ecx
jne 0x4047a2
test word [eax + 4], 0xffdf
jne 0x4047a2
mov dword [0x430d40], 1
mov ecx, dword [ebp - 0x2ec]
cmp dword [eax + 6], ecx
jne 0x4047c0
cmp dword [eax + 2], ebx
jne 0x4047c0
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove edi, ecx
mov ecx, dword [ebp - 0x2f0]
cmp dword [eax + 2], ecx
jne 0x4047f3
cmp dword [eax - 2], esi
jne 0x4047f3
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
mov eax, dword [0x40c994]
add eax, 0xa800
mov dword [esp], eax
call fcn.00408466
push ecx
push ecx
jmp 0x404819
mov eax, dword [ebp - 0x2e8]
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.00407cf5
push edx
push edx
cmp word [eax], 0x22
jne 0x40474f
add eax, 2
jmp 0x40474f
mov eax, dword [0x40c994]
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.0040448c
test eax, eax
je 0x404870
mov eax, dword [0x40c994]
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.004040c6
test eax, eax
push edx
mov esi, eax
jne 0x404b92
jmp 0x4048fa
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.00408498
push eax
push eax
call fcn.0040448c
test eax, eax
jne 0x404842
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40c4fe
mov dword [esp], ebx
call fcn.00408498
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], 0x40c510
call esi
push eax
push eax
call fcn.0040448c
test eax, eax
jne 0x404842
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x404b90
cmp dword [0x430dc8], 0
je 0x404b7d
mov eax, dword [ebp - 0x2dc]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.00407cf5
movzx edx, word [0x40c572]
push ecx
push ecx
movzx ecx, word [0x40c570]
movzx edi, word [0x40c56e]
shl edx, 0x10
or ecx, edx
movzx edx, word [str.___]
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 0x4049c8
cmp dword [eax + 4], edx
je 0x404970
sub eax, 2
jmp 0x40495e
cmp dword [eax], edi
jne 0x40496b
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.00408bd0
test eax, eax
push edx
jne 0x404993
mov esi, str.Error_launching_installer
jmp 0x404b90
mov eax, dword [0x40c994]
mov dword [esp + 4], ebx
add eax, 0xa800
mov dword [esp], eax
call fcn.00408466
mov eax, dword [0x40c994]
push edi
push edi
add eax, 0xb000
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.00408466
push eax
push eax
jmp 0x404b7d
call fcn.00408fe5
mov dword [esp + 4], str.nsu
mov edi, eax
mov dword [esp], ebx
call fcn.00408498
test edi, edi
push esi
push esi
je 0x4049f7
mov dword [esp + 4], 0x40c522
mov dword [esp], ebx
call fcn.00408498
push ecx
push ecx
mov dword [esp + 4], str..tmp
mov dword [esp], ebx
call fcn.00408498
push eax
push eax
mov eax, dword [0x40c994]
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 0x404989
test edi, edi
mov dword [esp], ebx
je 0x404a39
call fcn.00407af0
jmp 0x404a3e
call fcn.00407b84
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push eax
mov eax, dword [0x40c994]
cmp word [eax + 0xa800], 0
jne 0x404a6b
add eax, 0xa800
mov dword [esp + 4], esi
mov dword [esp], eax
call fcn.00408466
push eax
push eax
mov eax, dword [ebp - 0x2e0]
mov esi, str.Error_launching_installer
mov dword [esp + 4], eax
mov eax, dword [0x40c994]
mov dword [esp], eax
call fcn.00408466
push eax
push eax
movzx eax, word [0x40c578]
movzx edx, word [0x40c576]
mov edi, dword [0x40c994]
shl eax, 0x10
or eax, edx
mov dword [edi + 0x800], eax
mov edi, 0x1a
mov eax, dword [0x430d60]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x429940
mov dword [esp + 4], eax
call fcn.004085c9
push ecx
push ecx
mov dword [esp], 0x429940
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test esi, esi
push eax
je 0x404b56
mov eax, dword [0x40c994]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x429940
add eax, 0xd800
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x404b56
mov dword [esp + 4], 0
mov dword [esp], 0x429940
call fcn.00408b53
push eax
push eax
mov eax, dword [0x430d60]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x429940
mov dword [esp + 4], eax
call fcn.004085c9
push eax
push eax
mov dword [esp], 0x429940
call fcn.00407bb2
test eax, eax
push edx
je 0x404b56
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40c994]
inc word [eax + 0x800]
dec edi
jne 0x404aad
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.00408b53
push edi
push edi
jmp 0x404b90
mov dword [0x430d4c], 0xffffffff
call fcn.00406510
mov edi, eax
jmp 0x404b92
xor edi, edi
call fcn.004044e7
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x404bc5
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.00407c89
push esi
push esi
mov dword [esp], 2
jmp 0x404ce5
cmp dword [0x430d34], 0
je 0x404cd7
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 0x404c6c
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.00408f99
test eax, eax
push ecx
jne 0x404c9a
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
push edx
push edx
je 0x404cca
jmp 0x404cd7
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 0x404c7d
mov dword [esp], 9
call fcn.00403b26
push eax
mov eax, dword [0x430d4c]
cmp eax, 0xffffffff
cmovne edi, eax
mov dword [esp], edi
call ebx
nop