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Microsoft Defender
How to prevent efficiently Defender from considering a given VBS script as containing a threat
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<blockquote data-quote="LaurentG" data-source="post: 935557" data-attributes="member: 91050"><p>Yes, you're right, I just did the test and I have the same.</p><p>This is very strange.... and make me even more doubtful than before on accuracy of AMSI-based detections of MSDefender....</p><p></p><p>I don't remember exactly why I'm using <strong>"Msxml2.ServerXMLHTTP" </strong>rather than <strong>"WinHTTP.WinHTTPRequest.5.1"</strong></p><p>As far as I remember, in the past, my scripts that dowloaded files from Internet were using <strong>"Msxml2.XMLHTTP" </strong>(not <strong>server</strong>XMLHTTP...) , and some other were using<strong> "WinHTTP.WinHTTPRequest.5.1"</strong>. But I got some problems (I don't remember at all which ones). And it is on some forums that I found it was preferable to use "Msxml2.ServerXMLHTTP". Indeed, this solved al my issues..... until this script (but at this time, I was not using MSDefender, but AVAST, as antivirus).</p><p>And to be honest, I do not have any idea on the difference between these various solutions Msxml2.ServerXMLHTTP/ Msxml2.XMLHTTP / WinHTTP.WinHTTPRequest.5.1</p><p></p><p>Anyway, if I didn't have found a solution to have my script working, your test could be one. But since it's OK splitting the script in two sub-scripts...</p><p>Moreover, this kind of solution could help, but wouldn't be the answer to the initial question I ask with this thread :<strong> How to prevent efficiently Defender from considering a given VBS script as containing a threat ?</strong></p><p></p><p>We've seen that <strong>there is no solution</strong> for threats detected by AMSI-based models... except maybe to send a request of "False positive" to MS.... provided MS give a really positive answer to the question you sent them yesterday....</p><p>I'm looking forward to getting MS answer....</p></blockquote><p></p>
[QUOTE="LaurentG, post: 935557, member: 91050"] Yes, you're right, I just did the test and I have the same. This is very strange.... and make me even more doubtful than before on accuracy of AMSI-based detections of MSDefender.... I don't remember exactly why I'm using [B]"Msxml2.ServerXMLHTTP" [/B]rather than [B]"WinHTTP.WinHTTPRequest.5.1"[/B] As far as I remember, in the past, my scripts that dowloaded files from Internet were using [B]"Msxml2.XMLHTTP" [/B](not [B]server[/B]XMLHTTP...) , and some other were using[B] "WinHTTP.WinHTTPRequest.5.1"[/B]. But I got some problems (I don't remember at all which ones). And it is on some forums that I found it was preferable to use "Msxml2.ServerXMLHTTP". Indeed, this solved al my issues..... until this script (but at this time, I was not using MSDefender, but AVAST, as antivirus). And to be honest, I do not have any idea on the difference between these various solutions Msxml2.ServerXMLHTTP/ Msxml2.XMLHTTP / WinHTTP.WinHTTPRequest.5.1[B][/B] Anyway, if I didn't have found a solution to have my script working, your test could be one. But since it's OK splitting the script in two sub-scripts... Moreover, this kind of solution could help, but wouldn't be the answer to the initial question I ask with this thread :[B] How to prevent efficiently Defender from considering a given VBS script as containing a threat ?[/B] We've seen that [B]there is no solution[/B] for threats detected by AMSI-based models... except maybe to send a request of "False positive" to MS.... provided MS give a really positive answer to the question you sent them yesterday.... I'm looking forward to getting MS answer.... [/QUOTE]
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