Function at 0x403fe7
Capabilities:
Accept command line arguments
Copy file
Delete file
Get common file path
Shutdown system
Terminate process

Disassembly:
sub esp, 0x20
push ebx
push ebp
push esi
xor ebx, ebx
push edi
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov byte [esp + 0x14], 0x20
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push str.NSIS_Error
push 0x42e820
mov dword [0x42f0d0], eax
call fcn.004067e2
mov esi, 0x436400
mov edi, 0x400
push esi
push edi
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.00403fb3
mov ebp, dword [sym.imp.KERNEL32.dll_lstrcatA]
test eax, eax
jne 0x404064
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call ebp
call fcn.00403fb3
test eax, eax
je 0x4041ab
mov esi, 0x435000
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push edi
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_lstrcpynA]
push 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x435000], 0x22
mov dword [0x42f020], eax
jne 0x40409f
mov byte [esp + 0x14], 0x22
mov esi, 0x435001
push dword [esp + 0x14]
push esi
call fcn.00406314
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov edi, eax
mov dword [esp + 0x1c], edi
jmp 0x40411b
cmp cl, 0x20
jne 0x4040c3
inc eax
cmp byte [eax], 0x20
je 0x4040bd
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4040d3
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40410b
inc eax
cmp byte [eax], 0x53
jne 0x4040ec
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x4040ec
or ebx, 2
cmp dword [eax], 0x4352434e
jne 0x404102
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x404102
or ebx, 4
cmp dword [eax - 2], 0x3d442f20
je 0x404123
push dword [esp + 0x14]
push eax
call fcn.00406314
cmp byte [eax], 0x22
jne 0x40411b
inc eax
mov cl, byte [eax]
test cl, cl
jne 0x4040b8
jmp 0x404135
and byte [eax - 2], 0
add eax, 2
push eax
push 0x435400
call fcn.004067e2
push ebx
call fcn.00403aa0
xor ebx, ebx
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4041ab
cmp dword [0x42f034], ebx
je 0x40419b
push ebx
push edi
call fcn.00406314
mov esi, eax
jmp 0x404161
cmp dword [esi], 0x3d3f5f20
je 0x404165
dec esi
cmp esi, edi
jae 0x404158
cmp esi, edi
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4041d7
and byte [esi], 0
add esi, 4
push esi
call fcn.004063c9
test eax, eax
je 0x4041ab
push esi
push 0x435400
call fcn.004067e2
push esi
push 0x435800
call fcn.004067e2
mov dword [esp + 0x10], ebx
or dword [0x42f0cc], 0xffffffff
call fcn.004043ac
mov dword [esp + 0x18], eax
call fcn.00404387
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], 0
je 0x4042ca
push 0x100010
push dword [esp + 0x14]
call fcn.0040611b
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov dword [esp + 0x14], ebx
mov edi, 0x42a5e9
mov esi, 0x42a5e8
mov ebx, 0x42a1e8
push 0x436400
push edi
mov byte [0x42a5e8], 0x22
call fcn.004067e2
push str.ANSISu_.exe
push esi
call ebp
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], 0
je 0x4042b0
push 0x400
push ebx
push dword [0x42f020]
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameA]
lea eax, [eax + 0x42a1dd]
push 0x4091c9
push eax
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x4041ab
push 0
push edi
push ebx
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4042b0
push 0
push edi
call fcn.0040651f
cmp byte [0x435400], 0
je 0x40426e
push 0x435400
push ebx
call fcn.004067e2
jmp 0x404274
push ebx
call fcn.00406330
push 0x409248
push esi
call ebp
push dword [esp + 0x1c]
push esi
call ebp
push str.___
push esi
call ebp
push ebx
push esi
call ebp
push esi
call fcn.004062e8
push 0x436400
push esi
call fcn.004060a3
test eax, eax
je 0x4042b0
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [esp + 0x10], 0
inc byte [str.ANSISu_.exe]
inc dword [esp + 0x14]
cmp dword [esp + 0x14], 0x1a
jl 0x4041ea
jmp 0x4041ab
cmp dword [0x42f0b4], 0
je 0x40436f
push str.ADVAPI32.dll
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
mov edi, eax
test edi, edi
je 0x40435a
mov esi, dword [sym.imp.KERNEL32.dll_GetProcAddress]
push str.OpenProcessToken
push edi
call esi
push str.LookupPrivilegeValueA
push edi
mov ebp, eax
call esi
push str.AdjustTokenPrivileges
push edi
mov ebx, eax
call esi
test ebp, ebp
mov edi, eax
je 0x40435a
test ebx, ebx
je 0x40435a
test edi, edi
je 0x40435a
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x40435a
lea eax, [esp + 0x24]
xor esi, esi
push eax
push str.SeShutdownPrivilege
push esi
call ebx
push esi
push esi
lea eax, [esp + 0x28]
push esi
push eax
push esi
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push 0
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40436f
push 9
call fcn.0040229b
mov eax, dword [0x42f0cc]
cmp eax, 0xffffffff
je 0x40437d
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]