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<blockquote data-quote="Andy Ful" data-source="post: 979963" data-attributes="member: 32260"><p>Regsvr32 is used to register and unregister OLE controls. It is too often used for benign processes (also for DLLs in UserSpace). That is why it is in the experimental section. One can adopt an alternative method by using Windows 10 Exploit protection mitigation for regsvr.exe (Code Integrity Guard). This will block all OLE controls not signed by Microsoft (or Microsoft Store).</p><p>In most cases, the abused Regsvr32 is used to run the OLE controls from remote locations (including the Internet) and this method is very rarely used by benign processes on home computers. So, it is safe to block the outbound connections via the Firewall rule. This is also the idea adopted in FirewallHardening for many other LOLBins.</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 979963, member: 32260"] Regsvr32 is used to register and unregister OLE controls. It is too often used for benign processes (also for DLLs in UserSpace). That is why it is in the experimental section. One can adopt an alternative method by using Windows 10 Exploit protection mitigation for regsvr.exe (Code Integrity Guard). This will block all OLE controls not signed by Microsoft (or Microsoft Store). In most cases, the abused Regsvr32 is used to run the OLE controls from remote locations (including the Internet) and this method is very rarely used by benign processes on home computers. So, it is safe to block the outbound connections via the Firewall rule. This is also the idea adopted in FirewallHardening for many other LOLBins. [/QUOTE]
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