RSS feed source: US Computer Emergency Readiness Team

SUMMARY

The Cybersecurity and Infrastructure Security Agency (CISA) and the Multi-State Information Sharing & Analysis Center (MS-ISAC) conducted an incident response assessment of a state government organization’s network environment after documents containing host and user information, including metadata, were posted on a dark web brokerage site. Analysis confirmed that an unidentified threat actor compromised network administrator credentials through the account of a former employee—a technique commonly leveraged by threat actors—to successfully authenticate to an internal virtual private network (VPN) access point, further navigate the victim’s on-premises environment, and execute various lightweight directory access protocol (LDAP) queries against a domain controller.[1] Analysis also focused on the victim’s Azure environment, which hosts sensitive systems and data, as well as the compromised on-premises environment. Analysis determined there were no indications the threat actor further compromised the organization by moving laterally from the on-premises environment to the Azure environment.

CISA and MS-ISAC are releasing this Cybersecurity Advisory (CSA) to provide network defenders with the tactics, techniques, and procedures (TTPs) used by the threat actor and methods to protect against similar exploitation of both unnecessary and privileged accounts.

Download the PDF version of this report:

AA24-046A Threat Actor Leverages Compromised Account of Former Employee to Access State Government Organization (PDF, 499.99 KB ) TECHNICAL DETAILS

Note: This advisory uses the MITRE ATT&CK for

Click this link to continue reading the article on the source website.

RSS feed source: US Computer Emergency Readiness Team

SUMMARY

The Cybersecurity and Infrastructure Security Agency (CISA), National Security Agency (NSA), and Federal Bureau of Investigation (FBI) assess that People’s Republic of China (PRC) state-sponsored cyber actors are seeking to pre-position themselves on IT networks for disruptive or destructive cyberattacks against U.S. critical infrastructure in the event of a major crisis or conflict with the United States.

CISA, NSA, FBI and the following partners are releasing this advisory to warn critical infrastructure organizations about this assessment, which is based on observations from the U.S. authoring agencies’ incident response activities at critical infrastructure organizations compromised by the PRC state-sponsored cyber group known as Volt Typhoon (also known as Vanguard Panda, BRONZE SILHOUETTE, Dev-0391, UNC3236, Voltzite, and Insidious Taurus):

U.S. Department of Energy (DOE) U.S. Environmental Protection Agency (EPA) U.S. Transportation Security Administration (TSA) Australian Signals Directorate’s (ASD’s) Australian Cyber Security Centre (ACSC) Canadian Centre for Cyber Security (CCCS), a part of the Communications Security Establishment (CSE) United Kingdom National Cyber Security Centre (NCSC-UK) New Zealand National Cyber Security Centre (NCSC-NZ)

The U.S. authoring agencies have confirmed that Volt Typhoon has compromised the IT environments of multiple critical infrastructure organizations—primarily in Communications, Energy, Transportation Systems, and Water and Wastewater Systems Sectors—in the continental and non-continental United States and its territories, including Guam. Volt Typhoon’s choice of targets and pattern of behavior is not

Click this link to continue reading the article on the source website.