Today, CISA joined the National Security Agency (NSA), the Federal Bureau of Investigation (FBI), and international partners in releasing a joint cybersecurity advisory highlighting recently discovered activities conducted by a People’s Republic of China (PRC) state-sponsored cyber threat actor. This advisory highlights how PRC cyber actors use techniques called “living off the land” to evade detection by using built-in networking administration tools to compromise networks and conduct malicious activity. This enables the cyber actor to blend in with routine Windows system and network activities, limit activity and data captured in default logging configurations, and avoid endpoint detection and response (EDR) products that could alert to the introduction of third-party applications on the host or network. Private sector partners have identified that this activity affects networks across U.S. critical infrastructure sectors, and the authoring agencies believe the actor could apply the same techniques against these and other sectors worldwide. The authoring agencies have identified potential indicators associated with these techniques. To hunt for this activity, CISA and partners encourage network defenders to use the actor’s commands and detection signatures provided in this advisory . CISA and partners further encourage network defenders to view the indicators of compromise (IOCs) and mitigations summaries to detect this activity.CISAraw:5dfb2cab96b92389a648a9a6840d48e4 – 2023-05-24T20:07:20.000Z

May 24, 2023Elle CeeDee

Cybersecurity
Today, CISA joined the National Security Agency (NSA), the Federal Bureau of Investigation (FBI), and international partners in releasing a joint cybersecurity advisory highlighting recently discovered activities conducted by a People’s Republic of China (PRC) state-sponsored cyber threat actor.

This advisory highlights how PRC cyber actors use techniques called “living off the land” to evade detection by using built-in networking administration tools to compromise networks and conduct malicious activity. This enables the cyber actor to blend in with routine Windows system and network activities, limit activity and data captured in default logging configurations, and avoid endpoint detection and response (EDR) products that could alert to the introduction of third-party applications on the host or network. Private sector partners have identified that this activity affects networks across U.S. critical infrastructure sectors, and the authoring agencies believe the actor could apply the same techniques against these and other sectors worldwide.

The authoring agencies have identified potential indicators associated with these techniques. To hunt for this activity, CISA and partners encourage network defenders to use the actor’s commands and detection signatures provided in this advisory . CISA and partners further encourage network defenders to view the indicators of compromise (IOCs) and mitigations summaries to detect this activity.CISAraw:5dfb2cab96b92389a648a9a6840d48e4CISAWed, 24 May 23 12:00:00 +0000

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CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog , based on evidence of active exploitation. CVE-2023-2 868  Barracuda Networks ESG Appliance Improper Input Validation Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note:  To view other 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: Reducing the Significant Risk of Known Exploited Vulnerabilities  established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the  BOD 22-01 Fact Sheet  for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of Catalog vulnerabilities  as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . This product is provided subject to this Notification  and this Privacy & Use  policy.CISAraw:c10caedb098110c81742083ca1bb7557 – 2023-05-30T12:15:47.000Z
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CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog , based on evidence of active exploitation. CVE-2023-2 868  Barracuda Networks ESG Appliance Improper Input Validation Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note:  To view other 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: Reducing the Significant Risk of Known Exploited Vulnerabilities  established the Known Exploited Vulnerabilities Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the  BOD 22-01 Fact Sheet  for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of Catalog vulnerabilities  as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . This product is provided subject to this Notification  and this Privacy & Use  policy.CISAraw:750720923d0bad309449ad3f150687d9 – 2023-05-26T17:30:31.000Z
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CISA released one Industrial Control Systems (ICS) advisory on May 25, 2023. This advisory provides timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-23-145-01 Moxa MXsecurity Series CISA encourages users and administrators to review the newly released ICS advisory for technical details and mitigations.CISAraw:749c5fdcaa51e1bbc4192b9637bc2f11 – 2023-05-25T15:25:10.000Z
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