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James_inthe_box<p>When <a href="https://infosec.exchange/tags/windows" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>windows</span></a> decides it's had enough of you blocking it's update/telemetry processes (going to wd-prod-cp-us-west-2-fe\.westus.cloudapp.azure.com) and just yeats out the lookup over <a href="https://infosec.exchange/tags/netbios" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>netbios</span></a> 🤷</p>
Katos<p>After discovering that NetBIOS settings aren’t available in <a href="https://infosec.exchange/tags/intune" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>intune</span></a> <a href="https://infosec.exchange/tags/settings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>settings</span></a> - and therefore require disablement by script (or GPO) I raised the query with <a href="https://infosec.exchange/tags/microsoft" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>microsoft</span></a> - adding the support natively in intune would allow us to use config refresh to ensure that this remains disabled.</p><p>In the interim, I have created a <a href="https://infosec.exchange/tags/script" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>script</span></a> (+ Detection) to disable this, and will have to look into a custom <a href="https://infosec.exchange/tags/compliance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>compliance</span></a> <a href="https://infosec.exchange/tags/policy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>policy</span></a> to ensure that this is disabled across the estate.</p><p>If this sounds useful to you, I have open sourced my <a href="https://infosec.exchange/tags/netbios" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>netbios</span></a> and <a href="https://infosec.exchange/tags/llmnr" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>llmnr</span></a> disablement script here:</p><p><a href="https://github.com/Marshyp/Security-Scripts/tree/main/Endpoint/NetBIOS%26LLMNR" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/Marshyp/Security-Sc</span><span class="invisible">ripts/tree/main/Endpoint/NetBIOS%26LLMNR</span></a></p>
Mark Gardner<p>Anyway, I did what any underpaid college dropout would do:<br>• ask <a href="https://social.sdf.org/tags/IT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IT</span></a> for a few extra PCs on the LAN<br>• distribute the <a href="https://social.sdf.org/tags/cellular" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cellular</span></a> tower data across <a href="https://social.sdf.org/tags/Microsoft" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Microsoft</span></a> <a href="https://social.sdf.org/tags/Excel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Excel</span></a> workbooks, one per machine<br>• write some glue macros to exchange data (probably using Network <a href="https://social.sdf.org/tags/DDE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DDE</span></a> or <a href="https://social.sdf.org/tags/OLEAutomation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OLEAutomation</span></a>)<br>• babysit the PCs as they inevitably crashed every few hours due to <a href="https://social.sdf.org/tags/Windows" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Windows</span></a>' flaky cooperative multitasking and its <a href="https://social.sdf.org/tags/NetBIOS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NetBIOS</span></a> Frames (then called <a href="https://social.sdf.org/tags/NetBEUI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NetBEUI</span></a>) networking protocol (6/6)</p>