Function at 0x404c20
Capabilities:
Accept command line arguments
Copy file
Delete file
Get common file path
Get file attributes
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
lea esi, [ebp - 0x3e8]
push ebx
sub esp, 0x42c
mov dword [esp], 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov ebx, dword [sym.imp.KERNEL32.dll_GetVersionExW]
push eax
xor eax, eax
mov dword [ebp - 0x3d4], eax
mov dword [ebp - 0x2d4], eax
mov dword [ebp - 0x2d0], eax
mov dword [ebp - 0x3e8], 0x11c
mov dword [esp], esi
call ebx
push edx
test eax, eax
jne 0x404ca2
mov dword [ebp - 0x3e8], 0x114
mov dword [esp], esi
call ebx
xor eax, eax
push edi
cmp word [ebp - 0x3d4], 0x53
mov byte [ebp - 0x2ce], 4
jne 0x404c9b
mov ax, word [ebp - 0x3ba]
sub eax, 0x30
mov word [ebp - 0x2d4], ax
mov ecx, dword [ebp - 0x3e4]
cmp ecx, 9
ja 0x404cb7
and dword [ebp - 0x3dc], 0xffff
mov eax, dword [ebp - 0x3dc]
movzx edx, byte [ebp - 0x2d4]
shl ecx, 8
mov dword [0x41a058], eax
movzx eax, byte [ebp - 0x2ce]
shl edx, 8
or eax, edx
movzx edx, byte [ebp - 0x3e0]
movzx eax, ax
or edx, ecx
shl edx, 0x10
or eax, edx
mov dword [0x41a05c], eax
shr eax, 0x10
cmp ax, 0x600
je 0x404d10
xor ebx, ebx
mov dword [esp], ebx
call fcn.00409229
push esi
test eax, eax
je 0x404d10
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
cmp byte [ebx], 0
je 0x404d33
mov dword [esp], ebx
call fcn.0040919b
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
jmp 0x404d15
mov dword [esp], 0xc
call fcn.00409229
push ebx
mov dword [esp], 0xa
call fcn.00409229
push esi
mov dword [0x442244], eax
mov dword [esp], 8
call fcn.00409229
push edi
test eax, eax
je 0x404d78
mov dword [esp], 0x1e
call eax
push ecx
test eax, eax
je 0x404d78
or byte [0x41a05c], 0x80
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
xor ecx, ecx
xor edi, edi
xor esi, esi
mov dword [esp], ecx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
mov dword [section..bss], eax
lea eax, [ebp - 0x2cc]
mov dword [esp + 4], edi
mov dword [esp + 0x10], esi
mov dword [esp + 0xc], 0x2b4
mov dword [esp + 8], eax
mov dword [esp], 0x40f17a
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x442260
call fcn.00408c19
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov edi, dword [0x40fa94]
lea ecx, [edi + 0x50000]
mov dword [ebp - 0x3fc], ecx
mov dword [esp], ecx
mov dword [esp + 4], eax
call fcn.00408c19
push eax
push eax
xor eax, eax
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x442248], eax
push edx
movzx eax, word [edi + 0x50000]
lea edx, [edi + 0x50002]
cmp ax, 0x22
je 0x404e28
mov edx, dword [ebp - 0x3fc]
mov eax, 0x20
mov dword [esp], edx
mov dword [esp + 4], eax
call fcn.004084f7
push esi
push esi
xor esi, esi
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextW]
push edx
mov dword [ebp - 0x400], eax
cmp word [eax], 0
je 0x404f05
movzx edx, word [eax]
cmp dx, 0x20
jne 0x404e60
add eax, 2
jmp 0x404e52
cmp dx, 0x22
jne 0x404e6b
add eax, 2
jmp 0x404e70
mov edx, 0x20
cmp word [eax], 0x2f
jne 0x404ee5
cmp word [eax + 2], 0x53
lea ebx, [eax + 2]
jne 0x404e92
test word [eax + 4], 0xffdf
jne 0x404e92
mov dword [0x41a040], 1
cmp dword [eax + 6], 0x430052
jne 0x404eb2
cmp dword [eax + 2], 0x43004e
jne 0x404eb2
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove esi, ecx
cmp dword [eax + 2], 0x3d0044
jne 0x404ee3
cmp dword [eax - 2], 0x2f0020
jne 0x404ee3
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
lea eax, [edi + 0x54000]
mov dword [esp], eax
call fcn.00408c19
push ebx
push ebx
jmp 0x404f05
mov eax, ebx
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.004084f7
push ecx
push ecx
cmp word [eax], 0x22
jne 0x404e48
add eax, 2
jmp 0x404e48
mov eax, dword [sym.imp.KERNEL32.dll_GetTempPathW]
lea ebx, [edi + 0x64000]
mov dword [esp], 0x2000
mov dword [esp + 4], ebx
mov dword [ebp - 0x404], eax
call eax
push edx
push edx
call fcn.00404b60
test eax, eax
jne 0x404fd5
mov dword [esp + 4], 0x1ffb
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 sub.KERNEL32.dll_lstrcatW
push eax
push eax
call fcn.00404b60
test eax, eax
jne 0x404fd5
mov dword [esp + 4], ebx
mov dword [esp], 0x1ffc
mov eax, dword [ebp - 0x404]
call eax
push ecx
push ecx
mov dword [esp + 4], 0x40f19e
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
mov edx, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], str.TEMP
mov dword [ebp - 0x404], edx
call edx
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], 0x40f1b0
mov edx, dword [ebp - 0x404]
call edx
push eax
push eax
call fcn.00404b60
test eax, eax
jne 0x404fd5
call fcn.00404bbb
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
call dword [sym.imp.ole32.dll_OleUninitialize]
jmp 0x4052d2
lea eax, [edi + 0x60000]
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
mov dword [esp], esi
call fcn.004047ad
mov esi, eax
push edx
test eax, eax
jne 0x4052b5
cmp dword [0x42e124], 0
je 0x40528a
xor ecx, ecx
mov dword [esp + 4], ecx
mov eax, dword [ebp - 0x3fc]
mov dword [esp], eax
call fcn.004084f7
push esi
push esi
mov ecx, dword [ebp - 0x3fc]
cmp eax, ecx
jb 0x405081
cmp dword [eax + 4], 0x3d003f
je 0x405033
sub eax, 2
jmp 0x40501b
cmp dword [eax], 0x5f0020
jne 0x40502e
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.004090e7
push edx
test eax, eax
je 0x4052c2
lea eax, [edi + 0x54000]
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.00408c19
lea eax, [edi + 0x58000]
push esi
push esi
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.00408c19
push edi
push edi
jmp 0x40528a
call fcn.00409275
lea esi, [edi + 0x14000]
mov dword [ebp - 0x40c], eax
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrlenW
push edx
mov dword [ebp - 0x3fc], eax
lea eax, [edi + 0x18000]
mov dword [ebp - 0x404], eax
mov eax, dword [ebp - 0x400]
mov dword [esp], edi
mov dword [esp + 4], eax
call fcn.00408c19
push ecx
push ecx
cmp word [edi + 0x54000], 0
jne 0x4050e5
lea eax, [edi + 0x5c000]
mov dword [esp + 4], eax
lea eax, [edi + 0x54000]
mov dword [esp], eax
call fcn.00408c19
push eax
push eax
mov word [ebp - 0x400], 1
mov eax, dword [ebp - 0x3fc]
lea eax, [edi + eax*2 + 0x64000]
mov dword [ebp - 0x408], eax
xor eax, eax
mov dword [ebp - 0x3fc], eax
movzx eax, word [ebp - 0x400]
mov dword [ebp - 0x410], eax
mov eax, dword [ebp - 0x410]
mov dword [esp + 4], str.nsu_X.tmp
mov dword [esp + 8], eax
mov eax, dword [ebp - 0x408]
mov dword [esp], eax
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x42e130]
mov eax, dword [eax + 0x120]
mov dword [esp], esi
mov dword [esp + 4], eax
call fcn.0040929b
push ecx
push ecx
cmp dword [ebp - 0x40c], 0
mov dword [esp], ebx
je 0x405163
call fcn.00408340
jmp 0x405168
call fcn.004083a0
push edx
test eax, eax
je 0x4051c1
mov dword [esp], esi
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
bt eax, 0xa
push ecx
jb 0x40527b
mov dword [esp], esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push edx
test eax, eax
je 0x40527b
mov dword [esp + 4], 1
mov dword [esp], ebx
call fcn.00409833
push eax
push eax
cmp dword [ebp - 0x3fc], 0
jne 0x40527b
mov dword [ebp - 0x3fc], 1
jmp 0x405116
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
xor eax, eax
push ecx
mov dword [esp + 4], eax
mov dword [esp], ebx
call fcn.004097ee
push eax
push eax
lea eax, [edi + 0x6c000]
mov dword [esp + 8], 1
mov dword [esp + 4], esi
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x4052c2
xor eax, eax
mov dword [esp], esi
mov dword [esp + 4], eax
call fcn.004097ee
push eax
push eax
mov eax, dword [0x42e130]
mov eax, dword [eax + 0x124]
mov dword [esp + 4], eax
mov eax, dword [ebp - 0x404]
mov dword [esp], eax
call fcn.0040929b
push eax
push eax
mov eax, dword [ebp - 0x404]
mov dword [esp], eax
call fcn.004083cc
push edx
test eax, eax
je 0x40525f
mov dword [esp], eax
xor ebx, ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ecx
call fcn.00404bbb
call dword [sym.imp.ole32.dll_OleUninitialize]
jmp 0x4052f0
cmp dword [ebp - 0x3fc], 0
jne 0x4052c2
mov dword [esp], esi
call fcn.004090af
push edx
test eax, eax
je 0x4051b2
jmp 0x4052c2
inc word [ebp - 0x400]
jne 0x405101
jmp 0x4052c2
mov dword [0x41a04c], 0xffffffff
call fcn.00406d0c
mov dword [esp], 1
mov ebx, eax
call fcn.00408db2
push eax
call fcn.00404bbb
call dword [sym.imp.ole32.dll_OleUninitialize]
jmp 0x4052f0
call fcn.00404bbb
call dword [sym.imp.ole32.dll_OleUninitialize]
jmp 0x4052d2
call fcn.00404bbb
mov esi, str.Error_launching_installer
call dword [sym.imp.ole32.dll_OleUninitialize]
mov dword [esp + 4], 0x200010
mov dword [esp], esi
call fcn.0040848b
push eax
push eax
mov dword [esp], 2
jmp 0x4053f8
cmp dword [0x41a034], 0
je 0x4053ea
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
lea edx, [ebp - 0x3ec]
mov dword [esp + 4], 0x28
mov dword [esp + 8], edx
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
sub esp, 0xc
test eax, eax
je 0x405389
lea eax, [ebp - 0x2c8]
xor edi, edi
mov dword [esp + 4], str.SeShutdownPrivilege
lea esi, [ebp - 0x2cc]
mov dword [esp + 8], eax
mov dword [esp], edi
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
xor eax, eax
mov dword [ebp - 0x2cc], 1
mov dword [ebp - 0x2c0], 2
sub esp, 0xc
mov dword [esp + 0x14], eax
mov dword [esp + 0x10], eax
mov dword [esp + 0xc], eax
xor eax, eax
mov dword [esp + 8], esi
mov dword [esp + 4], eax
mov eax, dword [ebp - 0x3ec]
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
sub esp, 0x18
mov dword [esp], 4
call fcn.00409229
push esi
test eax, eax
jne 0x4053b7
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
push ecx
push ecx
test eax, eax
je 0x4053dd
jmp 0x4053ea
xor edx, edx
mov dword [esp + 0x10], 0x80040002
mov dword [esp + 0xc], 0x25
mov dword [esp + 8], edx
mov dword [esp + 4], edx
mov dword [esp], edx
call eax
sub esp, 0x14
test eax, eax
jne 0x40539a
mov dword [esp], 9
call fcn.00404249
push eax
mov eax, dword [0x41a04c]
cmp eax, 0xffffffff
cmovne ebx, eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_ExitProcess]