Function at 0x4036c6
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 0x40370c
push ebx
call fcn.00406b2a
cmp eax, ebx
je 0x40370c
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406aba
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x403711
push ebp
push 9
call fcn.00406b2a
push 7
call fcn.00406b2a
mov dword [0x42ca84], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42cb38], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x422718
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x42ba80
call fcn.004065a8
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x437000
push eax
push ebp
call fcn.004065a8
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x437000], 0x22
mov dword [0x42ca80], eax
mov eax, ebp
jne 0x4037a5
push 0x22
mov eax, 0x437002
pop edi
push edi
push eax
call fcn.00405f89
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 0x4038d6
push 0x20
pop ebx
cmp ax, bx
jne 0x4037d4
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4037cd
cmp word [ecx], 0x22
jne 0x4037df
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x4038a2
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x40380a
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403800
test ax, ax
jne 0x40380a
mov dword [0x42cb20], 1
movzx eax, word [0x40af62]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40af60]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40af5e]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403860
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403860
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40385b
test ax, ax
jne 0x403860
or dword [esp + 0x1c], 4
movzx eax, word [0x40af56]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40af54]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40af52]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x4038a2
mov eax, dword [ecx]
cmp eax, edi
je 0x4038c1
push ebx
push ecx
call fcn.00405f89
mov ecx, eax
cmp word [ecx], 0x22
jne 0x4038b3
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4037c5
jmp 0x4038d4
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x437800
call fcn.004065a8
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x439800
push esi
push 0x400
call edi
call fcn.00403695
test eax, eax
jne 0x403948
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403695
test eax, eax
jne 0x403948
push esi
push 0x3fc
call edi
push 0x40af3c
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 0x40af28
call edi
call fcn.00403695
test eax, eax
je 0x403a1a
push 0x439000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.0040324a
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403a1a
cmp dword [0x42ca9c], ebx
je 0x403a03
push ebx
push ebp
call fcn.00405f89
mov edi, eax
cmp edi, ebp
jb 0x4039cd
movzx eax, word [0x40af22]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40af20]
movzx ecx, word [str.___]
cdq
or ebx, eax
movzx eax, word [0x40af1e]
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 0x4039c5
mov edx, dword [edi + 4]
cmp edx, eax
je 0x4039cb
dec edi
dec edi
cmp edi, ebp
jae 0x4039b8
xor ebx, ebx
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403a46
mov word [edi], bx
add edi, 8
push edi
call fcn.00406064
test eax, eax
je 0x403a1a
push edi
push 0x437800
call fcn.004065a8
push edi
push 0x438000
call fcn.004065a8
mov dword [esp + 0x10], ebx
or dword [0x42cb2c], 0xffffffff
call fcn.00403ce7
push 1
mov dword [esp + 0x18], eax
call fcn.004068eb
call fcn.00403bec
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403b50
push 0x200010
push dword [esp + 0x10]
call fcn.00405c94
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405c17
push 0x40af10
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebx
je 0x403a67
push 0x40af0c
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x438800
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403a1a
cmp edi, ebx
push esi
je 0x403a8f
call fcn.00405b7d
jmp 0x403a94
call fcn.00405bfa
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x437800], bx
jne 0x403aaf
push ebp
push 0x437800
call fcn.004065a8
push dword [esp + 0x18]
push section..ndata
call fcn.004065a8
movzx eax, word [0x40aefa]
movzx ecx, word [0x40aef8]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42d800], eax
pop ebp
mov edi, 0x421f18
mov eax, dword [0x42ca90]
push dword [eax + 0x120]
push edi
call fcn.004065ca
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403b3a
push 1
push edi
push 0x43a800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403b3a
push ebx
push edi
call fcn.00406449
mov eax, dword [0x42ca90]
push dword [eax + 0x124]
push edi
call fcn.004065ca
push edi
call fcn.00405c2f
cmp eax, ebx
je 0x403b3a
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x42d800]
dec ebp
jne 0x403add
push ebx
push esi
call fcn.00406449
jmp 0x403a1a
cmp dword [0x42cb14], ebx
je 0x403bd4
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 0x403ba4
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.00406b2a
cmp eax, ebx
mov esi, 0x80040002
je 0x403bc0
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403bcd
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403bd4
push 9
call fcn.0040140b
mov eax, dword [0x42cb2c]
cmp eax, 0xffffffff
je 0x403be2
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]