SecureTeam

Microsoft releases One-Click ProxyLogon workaround for Exchange

News, Tools, Vulnerabilities / Ian Reynolds

Microsoft has released an easy to install one-click mitigation tool for the critical Exchange security vulnerability known as ProxyLogon as the NCSC issues an urgent alert to UK firms. The Hafnium/Proxylogon attack against Microsoft Exchange servers worldwide is escalating. Security researchers at Checkpoint report a 10 fold increase in daily attacks against Exchange e-mail servers […]

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How to identify ProxyLogon – Hafnium attacks on your Exchange Server

News, Vulnerabilities / Ian Reynolds

Microsoft has updated their Microsoft Safety Scanner (MSERT) tool so that it detects Web Shells installed on your Exchange servers through the ProxyLogon vulnerability. Last week Microsoft issued emergency patches to address four zero-day exploits that were being exploited by the Hafnium group. Since the disclosures, criminal groups have been targeting Microsoft Exchange Servers around

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Exchange Server RCE exploited in the wild

News, Vulnerabilities / Ian Reynolds

Microsoft has released a patch to a remote code execution vulnerability in Exchange server which is being actively targeted. CVE-2020-0688 is a flaw in the installation procedure resulting in all Exchange Servers using the same cryptographic keys for ASP.NET ViewState data. A detailed write-up by the Zero Day Initiative demonstrates the flaw in action. In summary:

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LightNeuron malware targets Exchange servers

News, Vulnerabilities / Ian Reynolds

LightNeuron is a backdoor specifically designed to target Microsoft Exchange mail servers. It permits attackers to read and reroute all email passing through the server and execute commands on the server hidden in incoming email attachments. A recent paper published by ESET describes how the malware functions and the risks it poses. The researcher says:

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Exchange Server

Microsoft releases One-Click ProxyLogon workaround for Exchange

How to identify ProxyLogon – Hafnium attacks on your Exchange Server

Exchange Server RCE exploited in the wild

LightNeuron malware targets Exchange servers

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