Function at 0x403334
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, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x40337a
push ebx
call fcn.004064be
cmp eax, ebx
je 0x40337a
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.0040644e
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x40337f
push ebp
push 9
call fcn.004064be
push 7
call fcn.004064be
mov dword [0x47aee4], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x47af98], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x440208
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x472ee0
call fcn.004060e4
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x4cb000
push eax
push ebp
call fcn.004060e4
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x4cb000], 0x22
mov dword [0x47aee0], eax
mov eax, ebp
jne 0x403413
push 0x22
mov eax, 0x4cb002
pop edi
push edi
push eax
call fcn.00405ac5
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x403544
push 0x20
pop ebx
cmp ax, bx
jne 0x403442
inc ecx
inc ecx
cmp word [ecx], bx
je 0x40343b
cmp word [ecx], 0x22
jne 0x40344d
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x403510
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x403478
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x40346e
test ax, ax
jne 0x403478
mov dword [0x47af80], 1
movzx eax, word [0x40a2c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a2be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x4034ce
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x4034ce
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x4034c9
test ax, ax
jne 0x4034ce
or dword [esp + 0x1c], 4
movzx eax, word [0x40a2b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2b4]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a2b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x403510
mov eax, dword [ecx]
cmp eax, edi
je 0x40352f
push ebx
push ecx
call fcn.00405ac5
mov ecx, eax
cmp word [ecx], 0x22
jne 0x403521
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x403433
jmp 0x403542
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x4cf000
call fcn.004060e4
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x4df000
push esi
push 0x2000
call edi
call fcn.00403303
test eax, eax
jne 0x4035b6
push 0x1ffb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403303
test eax, eax
jne 0x4035b6
push esi
push 0x1ffc
call edi
push 0x40a29c
push esi
call sub.KERNEL32.dll_lstrcatW
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push str.TEMP
call edi
push esi
push 0x40a288
call edi
call fcn.00403303
test eax, eax
je 0x403681
push 0x4db000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402e82
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403681
cmp dword [0x47aefc], ebx
je 0x403671
push ebx
push ebp
call fcn.00405ac5
mov edi, eax
cmp edi, ebp
jb 0x40363b
movzx eax, word [0x40a282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a280]
movzx ecx, word [0x40a27c]
cdq
or ebx, eax
movzx eax, word [0x40a27e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x403633
mov edx, dword [edi + 4]
cmp edx, eax
je 0x403639
dec edi
dec edi
cmp edi, ebp
jae 0x403626
xor ebx, ebx
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4036ad
mov word [edi], bx
add edi, 8
push edi
call fcn.00405ba0
test eax, eax
je 0x403681
push edi
push 0x4cf000
call fcn.004060e4
push edi
push 0x4d3000
call fcn.004060e4
mov dword [esp + 0x10], ebx
or dword [0x47af8c], 0xffffffff
call fcn.0040392d
mov dword [esp + 0x14], eax
call fcn.00403853
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4037b7
push 0x200010
push dword [esp + 0x10]
call fcn.00405829
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004057ac
push 0x40a270
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebx
je 0x4036ce
push 0x40a26c
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x4d7000
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403681
cmp edi, ebx
push esi
je 0x4036f6
call fcn.00405712
jmp 0x4036fb
call fcn.0040578f
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x4cf000], bx
jne 0x403716
push ebp
push 0x4cf000
call fcn.004060e4
push dword [esp + 0x18]
push section..ndata
call fcn.004060e4
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x47f000], eax
pop ebp
mov edi, 0x43c208
mov eax, dword [0x47aef0]
push dword [eax + 0x120]
push edi
call fcn.00406106
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x4037a1
push 1
push edi
push 0x4e7000
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x4037a1
push ebx
push edi
call fcn.00405f85
mov eax, dword [0x47aef0]
push dword [eax + 0x124]
push edi
call fcn.00406106
push edi
call fcn.004057c4
cmp eax, ebx
je 0x4037a1
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x47f000]
dec ebp
jne 0x403744
push ebx
push esi
call fcn.00405f85
jmp 0x403681
cmp dword [0x47af74], ebx
je 0x40383b
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x40380b
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004064be
cmp eax, ebx
mov esi, 0x80040002
je 0x403827
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403834
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40383b
push 9
call fcn.0040140b
mov eax, dword [0x47af8c]
cmp eax, 0xffffffff
je 0x403849
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]