Microsoft patch for virus

This field is for validation purposes and should be left unchanged. Author: Elizabeth Montalbano. July 7, am. Share this article:. A Tale of Two Vulnerabilities The PrintNightmare saga began last Tuesday when a proof-of-concept PoC exploit for the vulnerability — at that time tracked as CVE — was dropped on GitHub showing how an attacker can exploit the vulnerability to take control of an affected system.

Both of those are horrible workarounds that make it difficult for end users to print! Subscribe to our newsletter, Threatpost Today!

Get the latest breaking news delivered daily to your inbox. Subscribe now. Additional information on supported scan triggers and Kubernetes clusters can be found here. Log4j binaries are discovered whether they are deployed via a package manager, copied to the image as stand-alone binaries, or included within a JAR Archive up to one level of nesting.

We will continue to follow up on any additional developments and will update our detection capabilities if any additional vulnerabilities are reported. To find vulnerable images across registries using the Azure portal, navigate to the Microsoft Defender for Cloud service under Azure Portal. Open the Container Registry images should have vulnerability findings resolved recommendation and search findings for the relevant CVEs. Finding images with the CVE vulnerability. To view only vulnerable images that are currently running on a Kubernetes cluster using the Azure portal, navigate to the Microsoft Defender for Cloud service under Azure Portal.

Open the Vulnerabilities in running container images should be remediated powered by Qualys recommendation and search findings for the relevant CVEs:. Finding running images with the CVE vulnerability. Note: This recommendation requires clusters to run Microsoft Defender security profile to provide visibility on running images. Azure Resource Graph ARG provides instant access to resource information across cloud environments with robust filtering, grouping, and sorting capabilities.

ARG provides another way to query resource data for resources found to be affected by the Log4j vulnerability. The following query finds resources affected by the Log4j vulnerability across subscriptions.

Use the additional data field across all returned results to obtain details on vulnerable resources:. Microsoft Sentinel customers can use the following detection query to look for devices that have applications with the vulnerability:. The latest one with links to previous articles can be found here. Both Community users and enterprise customers can search within the threat intelligence portal for data about potentially vulnerable components exposed to the Internet.

Leverage this method of exploration to aid in understanding the larger Internet exposure, while also filtering down to what may impact you. For a more automated method, registered users can view their attack surface to understand tailored findings associated with their organization.

Note, you must be registered with a corporate email and the automated attack surface will be limited. Digital Footprint customers can immediately understand what may be vulnerable and act swiftly and resolutely using the Attack Surface Intelligence Dashboard Log4J Insights tab.

Microsoft Defender coordinates multiple security solutions that detect components of observed attacks taking advantage of this vulnerability, from exploitation attempts to remote code execution and post-exploitation activity.

Microsoft Defender solutions protect against related threats. Customers can click Need help? Turn on cloud-delivered protection in Microsoft Defender Antivirus to cover rapidly evolving attacker tools and techniques. Cloud-based machine learning protections block the majority of new and unknown variants. Microsoft Defender Antivirus detects components and behaviors related to this threat as the following detection names:.

Users of Microsoft Defender for Endpoint can turn on the following attack surface reduction rule to block or audit some observed activity associated with this threat. Due to the broad network exploitation nature of vectors through which this vulnerability can be exploited and the fact that applying mitigations holistically across large environments will take time, we encourage defenders to look for signs of post-exploitation rather than fully relying on prevention.

Observed post exploitation activity such as coin mining, lateral movement, and Cobalt Strike are detected with behavior-based detections. Alerts with the following titles in the Security Center indicate threat activity related to exploitation of the Log4j vulnerability on your network and should be immediately investigated and remediated. These alerts are supported on both Windows and Linux platforms:. The following alerts detect activities that have been observed in attacks that utilize at least one of the Log4j vulnerabilities.

However, these alerts can also indicate activity that is not related to the vulnerability. We are listing them here, as it is highly recommended that they are triaged and remediated immediately given their severity and the potential that they could be related to Log4j exploitation:.

Some of the alerts mentioned above utilize the enhanced network inspection capabilities in Microsoft Defender for Endpoint.

These alerts correlate several network and endpoint signals into high-confidence detection of successful exploitation, as well as providing detailed evidence artifacts valuable for triage and investigation of detected activities.

Example detection leveraging network inspection provides details about the Java class returned following successful exploitation. Microsoft Defender detects exploitation patterns in different data sources, including cloud application traffic reported by Microsoft Defender for Cloud Apps. The following alert surfaces exploitation attempts via cloud applications that use vulnerable Log4j components:.

To add a layer of protection against exploits that may be delivered via email, Microsoft Defender for Office flags suspicious emails e. We also added the following new alert, which detects attempts to exploit CVE through email headers:. Sample alert on malicious sender display name found in email correspondence. This detection looks for exploitation attempts in email headers, such as the sender display name, sender, and recipient addresses.

The alert covers known obfuscation attempts that have been observed in the wild. If this alert is surfaced, customers are recommended to evaluate the source address, email subject, and file attachments to get more context regarding the authenticity of the email.

Sample email event surfaced via advanced hunting. This query is designed to flag exploitation attempts for cases where the attacker is sending the crafted exploitation string using vectors such as User-Agent, Application or Account name.

Devices with Log4j vulnerability alerts and additional other alert-related context. This query surfaces devices with Log4j-related alerts and adds additional context from other alerts on the device. This query looks for exploitation of the vulnerability using known parameters in the malicious string. It surfaces exploitation but may surface legitimate behavior in some environments.

These events warrant further investigation to determine if they are in fact related to a vulnerable Log4j application. This query identifies a unique string present in malicious PowerShell commands attributed to threat actors exploiting vulnerable Log4j applications. This query identifies unique, uncommon PowerShell flags used by curl to post the results of an attacker-executed command back to the command-and-control infrastructure.

Microsoft Defender for IoT has released a dedicated threat Intelligence update package for detecting Log4j 2 exploit attempts on the network example below. Microsoft Defender for IoT sensor threat intelligence update.

Microsoft Defender for IoT now pushes new threat intelligence packages to cloud-connected sensors upon release, click here for more information. Microsoft January Patch Tuesday: Six zero-days, over 90 vulnerabilities fixed. Best cheap vacuum cleaner Affordable and reliable too. What can you do with an MBA? Best MagSafe accessories Chargers, portable batteries, car mounts, and more. Best foldable phones You'll flip for Samsung. Best Mac app 10 essential tools.

You agree to receive updates, promotions, and alerts from ZDNet. This is a clear reason to update the operating system and some Microsoft applications as soon as possible. Exploitation of the other seven can give an attacker the remote code execution ability:. The last one seems to be the most unpleasant vulnerability. A bug in the HTTP protocol stack theoretically allows attackers not only to make the affected computer execute arbitrary code, but also to spread the attack over the local network according to Microsoft terminology, the vulnerability is classified as wormable — that is, it can be used to create a worm.

Experts also expressed concern about the presence of another serious vulnerability in Microsoft Exchange Server — CVE which, by the way, is not the only Exchange bug on the list, just the most dangerous.