Function at 0x40326a
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 ebp
push esi
push 0x20
xor ebp, ebp
pop esi
mov dword [esp + 0xc], ebp
push 0x8001
mov dword [esp + 0xc], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x18], ebp
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x4032af
push ebp
call fcn.004063f5
cmp eax, ebp
je 0x4032af
push 0xc00
call eax
push ebx
push edi
push str.UXTHEME
call fcn.00406389
push str.USERENV
call fcn.00406389
push str.SETUPAPI
call fcn.00406389
push 9
call fcn.004063f5
push 7
call fcn.004063f5
mov dword [0x429224], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4292d8], eax
push ebp
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebp
push 0x4206c8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x428220
call fcn.0040601f
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebx, 0x434000
push eax
push ebx
call fcn.0040601f
push ebp
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x434000], 0x22
mov dword [0x429220], eax
mov eax, ebx
jne 0x40334c
push 0x22
mov eax, 0x434002
pop esi
push esi
push eax
call fcn.00405a00
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bp
je 0x40347e
push 0x20
pop edx
cmp ax, dx
jne 0x40337b
inc ecx
inc ecx
cmp word [ecx], dx
je 0x403374
cmp word [ecx], 0x22
mov ebp, edx
jne 0x403388
inc ecx
push 0x22
inc ecx
pop ebp
cmp word [ecx], 0x2f
jne 0x40344a
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4033b2
mov ax, word [ecx + 2]
cmp ax, dx
je 0x4033a8
test ax, ax
jne 0x4033b2
mov dword [0x4292c0], 1
movzx eax, word [0x4092c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x4092c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x4092be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403408
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403408
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x403403
test ax, ax
jne 0x403408
or dword [esp + 0x1c], 4
movzx eax, word [0x4092b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x4092b4]
cdq
movzx edx, word [0x4092b0]
or edi, eax
movzx eax, word [0x4092b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x40344a
mov eax, dword [ecx]
cmp eax, edi
je 0x403469
push ebp
push ecx
call fcn.00405a00
mov ecx, eax
cmp word [ecx], 0x22
jne 0x40345b
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x40336c
jmp 0x40347c
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x434800
call fcn.0040601f
xor ebp, ebp
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x436800
push esi
push 0x400
call edi
call fcn.00403239
test eax, eax
jne 0x4034f0
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403239
test eax, eax
jne 0x4034f0
push esi
push 0x3fc
call edi
push 0x40929c
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 0x409288
call edi
call fcn.00403239
test eax, eax
je 0x4035bb
push 0x436000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402dee
cmp eax, ebp
mov dword [esp + 0x10], eax
jne 0x4035bb
cmp dword [0x42923c], ebp
je 0x4035ab
push ebp
push ebx
call fcn.00405a00
mov edi, eax
cmp edi, ebx
jb 0x403575
movzx eax, word [0x409282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebp, eax
movzx eax, word [0x409280]
movzx ecx, word [0x40927c]
cdq
or ebp, eax
movzx eax, word [0x40927e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebp
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x40356d
mov edx, dword [edi + 4]
cmp edx, eax
je 0x403573
dec edi
dec edi
cmp edi, ebx
jae 0x403560
xor ebp, ebp
cmp edi, ebx
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4035e8
mov word [edi], bp
add edi, 8
push edi
call fcn.00405adb
test eax, eax
je 0x4035bb
push edi
push 0x434800
call fcn.0040601f
push edi
push 0x435000
call fcn.0040601f
mov dword [esp + 0x10], ebp
or dword [0x4292cc], 0xffffffff
call fcn.00403868
mov dword [esp + 0x14], eax
call fcn.0040378e
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebp
pop edi
pop ebx
je 0x4036f2
push 0x200010
push dword [esp + 0xc]
call fcn.00405764
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004056e7
push 0x409270
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebp
je 0x403609
push 0x40926c
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebx, 0x435800
push ebx
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x4035bb
cmp edi, ebp
push esi
je 0x403631
call fcn.0040564d
jmp 0x403636
call fcn.004056ca
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x434800], bp
jne 0x403651
push ebx
push 0x434800
call fcn.0040601f
push dword [esp + 0x18]
push section..ndata
call fcn.0040601f
movzx eax, word [0x40925a]
movzx ecx, word [0x409258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42a800], eax
pop ebx
mov edi, 0x41fec8
mov eax, dword [0x429230]
push dword [eax + 0x120]
push edi
call fcn.00406041
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebp
je 0x4036dc
push 1
push edi
push 0x437800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x4036dc
push ebp
push edi
call fcn.00405ec0
mov eax, dword [0x429230]
push dword [eax + 0x124]
push edi
call fcn.00406041
push edi
call fcn.004056ff
cmp eax, ebp
je 0x4036dc
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebp
inc word [0x42a800]
dec ebx
jne 0x40367f
push ebp
push esi
call fcn.00405ec0
jmp 0x4035bb
cmp dword [0x4292b4], ebp
je 0x403776
lea eax, [esp + 0x10]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403746
lea eax, [esp + 0x1c]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
lea eax, [esp + 0x20]
push ebp
push eax
push ebp
push dword [esp + 0x24]
mov dword [esp + 0x30], 1
mov dword [esp + 0x3c], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004063f5
cmp eax, ebp
mov esi, 0x80040002
je 0x403762
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x40376f
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403776
push 9
call fcn.0040140b
mov eax, dword [0x4292cc]
cmp eax, 0xffffffff
je 0x403784
mov dword [esp + 0xc], eax
push dword [esp + 0xc]
call dword [sym.imp.KERNEL32.dll_ExitProcess]