11/6/2022 0 Comments Ms exchange client for windows
Recommend also updating with recent July Patch.' WHEN '.14' THEN 'Exchange 2016 CU19 May21 patched against ProxyShell. WHEN '.10' THEN 'Exchange 2016 CU20 May21 patched against ProxyShell. WHEN '.12' THEN 'Exchange 2016 CU21 Jul21 patched against ProxyShell.' WHEN '.8' THEN 'Exchange 2016 CU21 patched against ProxyShell. WHEN '.14' THEN 'Exchange 2016 CU21 Jul21 patched against ProxyShell' WHEN '15.2.858.12' THEN 'Exchange 2019 CU9 May21 patched against ProxyShell. WHEN '15.2.858.15' THEN 'Exchange 2019 CU9 Jul21 patched against ProxyShell' WHEN '15.2.922.7' THEN 'Exchange 2019 CU10 patched against ProxyShell. WHEN '15.2.922.13' THEN 'Exchange 2019 CU10 Jul21 patched against ProxyShell' Manually verify build number from MS documentation./' Note, 'Check Exchange Version to confirm Patch. The version numbers identified in the below query were gathered from this Microsoft article. Ms exchange client for windows windows#To determine whether you are running an unpatched version of Exchange or not, the below XDR query for live Windows devices will produce a table of Exchange servers, their current version, and guidance whether they need patching or not. Investigate exposure Verifying current Microsoft Exchange version SophosLabs has released additional behavior-based protection for LockFile provided by the Mem/LockFile-A detection for Windows devices running Sophos endpoint and server protection managed through Sophos Central. LockFile is a new ransomware family that appears to exploit the ProxyShell vulnerabilities to breach targets with unpatched, on premises Microsoft Exchange servers. In addition, on August 24th, SophosLabs released a new, more generic signature 2305979 to detect attempted vulnerability exploit in Microsoft Exchange server. SophosLabs has also published IPS signatures: CVE CXmal/WebAgnt-A (detects malicious PST files in the context of customers’ environments).Troj/Agent-BHQD (detects the binary component of LockFile ransomware).Troj/ASPDoor-AF (detects malicious PST files).Troj/ASPDoor-Y (detects malicious PST files).They can be used by threat hunters to perform searches in their own environments. Sophos customers are protected by multiple detections for the exploitation of these vulnerabilities. Verify that all protections have been enabled and your exclusions are kept to a minimum Ensure endpoint protection is deployed on all endpoints and servers.Identify and remove any persistence established by an actor.Review process activity for instances of w3wp.exe.Identify and delete web shells and malicious binaries.(For non Sophos MTR customers) Identify and investigate your exposure windows for adversarial activity. Ms exchange client for windows software#If you have already been breached, the software patches do not address post-exploit behavior by a threat actor Patching only ensures that the vulnerability cannot be further exploited.
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