Attacks

16 Feb

CISA Releases Fifteen Industrial Control Systems Advisories

Attacks, Insights, Malware

Original release date: February 16, 2023 CISA released fifteen (15) Industrial Control Systems (ICS) advisories on February 16, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. CISA encourages users and administrators to review the newly released ICS advisories for technical details and mitigations: ICSA-23-047-01 Siemens Solid Edge ICSA-23-047-02 Siemens SCALANCE X-200 IRT ICSA-23-047-03 Siemens Brownfield Connectivity Client ICSA-23-047-04 Siemens Brownfield Connectivity Gateway ICSA-23-047-05 Siemens SiPass integrated AC5102/ACC-G2 and…

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15 Feb

Threat Actors Spoofing Emsisoft Certificates to Breach Networks

Attacks, Malware

This form of attack is not novel by any means and has been successfully leveraged by many groups in the past. Perhaps the best form of prevention is to ensure that all security analysts are aware of this form of attack. Apart from spreading awareness, an organization could also ensure that their security controls are set to block files with invalid signatures from running. Additionally, ensure that RDP ports are only open on devices where…

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15 Feb

Microsoft Patch Tuesday Addresses Multiple Zero Days

Attacks, Malware

Due to the risks involved with these vulnerabilities, these updates should be tested and pushed to production environments as soon as policies allow. These attacks require initial access to be effective, and phishing emails are the most prominent method of gaining that first foothold. Ensuring that users know the risks of phishing emails and how to detect them can help protect an organization. Remote Code Execution and Privilege Escalation vulnerabilities are inevitable with the increasing…

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15 Feb

Microsoft: Exchange Server 2013 Reaches End of Support in April

Attacks, Malware

It is recommended to upgrade any instances of Exchange 2013 to a newer version of Exchange as soon as possible. Exchange 2013 servers can also be migrated to Microsoft’s hosted Exchange Online email and calendaring solution, available as an Office 365 subscription or as a stand-alone service. Once mailboxes, public folders, and other data are migrated, admins can remove on-premises Exchange servers and Active Directory. Microsoft recently urged customers to keep their on-premises Exchange servers…

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14 Feb

Mozilla Releases Security Updates for Firefox 110 and Firefox ESR

Attacks, Insights, Malware

Original release date: February 14, 2023 Mozilla has released security updates to address vulnerabilities in Firefox 110 and Firefox ESR. An attacker could exploit these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Mozilla’s security advisories for Firefox 110 and Firefox ESR 102.8 for more information and apply the necessary updates. This product is provided subject to this Notification and this Privacy & Use policy.

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14 Feb

Citrix Releases Security Updates for Workspace Apps, Virtual Apps and Desktops

Attacks, Insights, Malware

Original release date: February 14, 2023 Citrix has released security updates to address high-severity vulnerabilities (CVE-2023-24486, CVE-2023-24484, CVE-2023-24485, and CVE-2023-24483) in Citrix Workspace Apps, Virtual Apps and Desktops. A local user could exploit these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Citrix security bulletins CTX477618, CTX477617, and CTX477616 for more information and to apply the necessary updates. This product is provided subject to this Notification and this…

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14 Feb

CISA Adds Four Known Exploited Vulnerabilities to Catalog

Attacks, Insights, Malware

Original release date: February 14, 2023 CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note: To view the newly added vulnerabilities in the catalog, click on the arrow in the “Date Added to Catalog” column, which will sort by descending dates. Binding Operational Directive (BOD) 22-01:…

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14 Feb

Microsoft Releases February 2023 Security Updates

Attacks, Insights, Malware

Original release date: February 14, 2023 Microsoft has released updates to address multiple vulnerabilities in Microsoft software. An attacker can exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Microsoft’s February 2023 Security Update Guide and Deployment Information and apply the necessary updates. This product is provided subject to this Notification and this Privacy & Use policy.

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14 Feb

Apple Deploys Patch Fixing Actively-Exploited WebKit Vulnerability

Attacks, Malware

Companies are highly encouraged to patch as soon as their change management procedures allow. It’s possible that threat actors using this exploit currently will ramp up deployment in an effort to compromise devices before they get patched. Additionally, analysts should look for suspicious processes and activity stemming from Safari, pending further information from Apple about the specifics of the exploit, as far back as their logging allows. https://www.bleepingcomputer.com/news/security/apple-fixes-new-webkit-zero-day-exploited-to-hack-iphones-macs/

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14 Feb

Mortal Kombat Ransomware Targeting US Victims

Attacks, Malware

This group is clearly financially motivated, using the ransomware as one way to target victims and encrypt files for extortion, in addition to exploiting the chance to steal cryptocurrency. Talos analysts assess that this particular ransomware isn’t very sophisticated as it will target system files and applications too, which are commonly avoided to prevent the system from becoming unstable. A victim will know they are infected because their wallpaper will change to a Mortal Kombat…

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