Function at 0x40348f
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]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42a22c], eax
je 0x4034df
push ebx
call fcn.004067d0
cmp eax, ebx
je 0x4034df
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406760
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x4034e4
push 0xb
call fcn.004067d0
push 9
call fcn.004067d0
push 7
mov dword [0x42a224], eax
call fcn.004067d0
cmp eax, ebx
je 0x403527
push 0x1e
call eax
test eax, eax
je 0x403527
or byte [0x42a22f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42a2f8], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x4216c8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x429220
call fcn.004063db
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x435000
push eax
push ebp
call fcn.004063db
cmp word [0x435000], 0x22
mov dword [0x42a220], 0x400000
mov eax, ebp
jne 0x403590
push 0x22
mov eax, 0x435002
pop edi
push edi
push eax
call fcn.00405cdd
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 0x4036c1
push 0x20
pop ebx
cmp ax, bx
jne 0x4035bf
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4035b8
cmp word [ecx], 0x22
jne 0x4035ca
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x40368d
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4035f5
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x4035eb
test ax, ax
jne 0x4035f5
mov dword [0x42a2e0], 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 0x40364b
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x40364b
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x403646
test ax, ax
jne 0x40364b
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 0x40368d
mov eax, dword [ecx]
cmp eax, edi
je 0x4036ac
push ebx
push ecx
call fcn.00405cdd
mov ecx, eax
cmp word [ecx], 0x22
jne 0x40369e
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4035b0
jmp 0x4036bf
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x435800
call fcn.004063db
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x437800
push esi
push 0x400
call edi
call fcn.0040345e
test eax, eax
jne 0x403733
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040345e
test eax, eax
jne 0x403733
push esi
push 0x3fc
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.0040345e
test eax, eax
je 0x4037fe
push 0x437000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00403015
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4037fe
cmp dword [0x42a240], ebx
je 0x4037ee
push ebx
push ebp
call fcn.00405cdd
mov edi, eax
cmp edi, ebp
jb 0x4037b8
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 0x4037b0
mov edx, dword [edi + 4]
cmp edx, eax
je 0x4037b6
dec edi
dec edi
cmp edi, ebp
jae 0x4037a3
xor ebx, ebx
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40382a
mov word [edi], bx
add edi, 8
push edi
call fcn.00405db8
test eax, eax
je 0x4037fe
push edi
push 0x435800
call fcn.004063db
push edi
push 0x436000
call fcn.004063db
mov dword [esp + 0x10], ebx
or dword [0x42a2ec], 0xffffffff
call fcn.00403aaa
mov dword [esp + 0x14], eax
call fcn.004039d0
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403934
push 0x200010
push dword [esp + 0x10]
call fcn.00405a41
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004059ac
push 0x40a270
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebx
je 0x40384b
push 0x40a26c
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x436800
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x4037fe
cmp edi, ebx
push esi
je 0x403873
call fcn.00405912
jmp 0x403878
call fcn.0040598f
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x435800], bx
jne 0x403893
push ebp
push 0x435800
call fcn.004063db
push dword [esp + 0x18]
push section..ndata
call fcn.004063db
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42b800], eax
pop ebp
mov edi, 0x420ec8
mov eax, dword [0x42a234]
push dword [eax + 0x120]
push edi
call fcn.00406418
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x40391e
push 1
push edi
push 0x438800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x40391e
push ebx
push edi
call fcn.004061a1
mov eax, dword [0x42a234]
push dword [eax + 0x124]
push edi
call fcn.00406418
push edi
call fcn.004059c4
cmp eax, ebx
je 0x40391e
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x42b800]
dec ebp
jne 0x4038c1
push ebx
push esi
call fcn.004061a1
jmp 0x4037fe
cmp dword [0x42a2d4], ebx
je 0x4039b8
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 0x403988
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.004067d0
cmp eax, ebx
mov esi, 0x80040002
je 0x4039a4
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4039b1
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4039b8
push 9
call fcn.0040140b
mov eax, dword [0x42a2ec]
cmp eax, 0xffffffff
je 0x4039c6
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]