CISA Updates Advisory on Threat Actors Exploiting Multiple CVEs Against Zimbra Collaboration Suite

CISA and the Multi-State Information Sharing & Analysis Center MS-ISAC have updated joint Cybersecurity Advisory AA22-228A: Threat Actors Exploiting Multiple CVEs Against Zimbra Collaboration Suite, originally released August 16, 2022. The advisory has been updated to reference the addition of a...

Chinese APT's favorite vulnerabilities revealed

In a joint cybersecurity advisory, the National Security Agency NSA, the Cybersecurity and Infrastructure Security Agency CISA, and the Federal Bureau of Investigation FBI have revealed the top CVEs used by state-sponsored threat actors from China. The advisory aims to "inform federal and state,...

Top CVEs Actively Exploited by People’s Republic of China State-Sponsored Cyber Actors   

CISA, the Federal Bureau of Investigation FBI, and the National Security Agency NSA have released a joint Cybersecurity Advisory CSA providing the top Common Vulnerabilities and Exposures CVEs used since 2020 by People’s Republic of China PRC state-sponsored cyber actors. PRC state-sponsored cybe...

Impacket and Exfiltration Tool Used to Steal Sensitive Information from Defense Industrial Base Organization

CISA, the Federal Bureau of Investigation FBI, and the National Security Agency NSA have released a joint Cybersecurity Advisory CSA, Impacket and Exfiltration Tool Used to Steal Sensitive Information from Defense Industrial Base Organization, highlighting advanced persistent threat APT activity...

Iranian Islamic Revolutionary Guard Corps-Affiliated Cyber Actors Exploiting Vulnerabilities for Data Extortion and Disk Encryption for Ransom Operations

Summary Actions to take today to protect against ransom operations: • Keep systems and software updated and prioritize remediating known exploited vulnerabilities. • Enforce MFA. • Make offline backups of your data. This joint Cybersecurity Advisory CSA is the result of an analytic effort among t...

CISA and FBI issue alert about Zeppelin ransomware

The Federal Bureau of Investigation FBI and the Cybersecurity and Infrastructure Security Agency CISA have released a joint Cybersecurity Advisory CSA about Zeppelin ransomware. The advisory contains indicators of compromise IOCs and tactics, techniques, and procedures TTPs associated with...

Threat Actors Exploiting Multiple Vulnerabilities Against Zimbra Collaboration Suite

CISA and the Multi-State Information Sharing & Analysis Center MS-ISAC have released a joint Cybersecurity Advisory CSA in response to active exploitation of multiple vulnerabilities against Zimbra Collaboration Suite ZCS, an enterprise cloud-hosted collaboration software and email platform. CISA...

#StopRansomware: MedusaLocker

Summary Actions to take today to mitigate cyber threats from ransomware: • Prioritize remediating known exploited vulnerabilities. • Train users to recognize and report phishing attempts. • Enable and enforce multifactor authentication. Note: this joint Cybersecurity Advisory CSA is part of an...

CISA and ACSC Release Top 2021 Malware Strains

CISA and the Australian Cyber Security Centre ACSC have published a joint Cybersecurity Advisory on the top malware strains observed in 2021. Malicious cyber actors often use malware to covertly compromise and then gain access to a computer or mobile device. As malicious cyber actors have been...

CISA Releases Log4Shell-Related MAR

From May through June 2022, CISA responded to an organization that was compromised by an exploitation of an unpatched and unmitigated Log4Shell vulnerability in a VMware Horizon server. CISA analyzed five malware samples obtained from the organization’s network and released a Malware Analysis...

North Korean APT targets US healthcare sector with Maui ransomware

State-sponsored North Korean threat actors have been targeting the US Healthcare and Public Health HPH sector for the past year using the Maui ransomware, according to a joint cybersecurity advisory CSA from the FBI, Cybersecurity and Infrastructure Security Agency CISA, and the Department of the...

Log4Shell Still Being Exploited to Hack VMWare Servers to Exfiltrate Sensitive Data

The U.S. Cybersecurity and Infrastructure Security Agency CISA, along with the Coast Guard Cyber Command CGCYBER, on Thursday released a joint advisory warning of continued attempts on the part of threat actors to exploit the Log4Shell flaw in VMware Horizon servers to breach target networks...

Malicious Cyber Actors Continue to Exploit Log4Shell in VMware Horizon Systems

CISA and the United States Coast Guard Cyber Command CGCYBER have released a joint Cybersecurity Advisory CSA to warn network defenders that cyber threat actors, including state-sponsored advanced persistent threat APT actors, have continued to exploit CVE-2021-44228 Log4Shell in VMware Horizon®...

People’s Republic of China State-Sponsored Cyber Actors Exploit Network Providers and Devices

Summary Best Practices • Apply patches as soon as possible • Disable unnecessary ports and protocols • Replace end-of-life infrastructure • Implement a centralized patch management system This joint Cybersecurity Advisory describes the ways in which People’s Republic of China PRC state-sponsored...

Karakurt Data Extortion Group

CISA, the Federal Bureau of Investigation FBI, the Department of Treasury, and the Financial Crimes Enforcement Network FinCEN have released a joint Cybersecurity Advisory CSA to provide information on the Karakurt data extortion group. Karakurt actors steal data and threaten to auction it off or...

VMWare vulnerabilities are actively being exploited, CISA warns

The Cybersecurity & Infrastructure Security Agency has issued an Emergency Directive ED 22-03 and released a Cybersecurity Advisory CSA about ongoing, and expected exploitation of multiple vulnerabilities in several VMware products. Chaining unpatched VMware vulnerabilities The title of the...

10 ways attackers gain access to networks

A joint multi-national cybersecurity advisory has revealed the top ten attack vectors most exploited by cybercriminals in order to gain access to organisation networks, as well as the techniques they use to gain access. The advisory cites five techniques used to gain leverage: 1. Public facing...

The BlackByte ransomware group is striking users all over the globe

News summary Cisco Talos has been monitoring the BlackByte Ransomware Group for several months, infecting victims all over the world, from North America to Colombia, Netherlands, China, Mexico and Vietnam.The FBI released a joint cybersecurity advisory in February 2022 warning about this group,...

CISA Issues Emergency Directive and Releases Advisory Related to VMware Vulnerabilities

CISA has issued Emergency Directive ED 22-03 and released a Cybersecurity Advisory CSA in response to active and expected exploitation of multiple vulnerabilities in the following VMware products: VMware Workspace ONE Access Access, VMware Identity Manager vIDM, VMware vRealize Automation vRA,...

Weak Security Controls and Practices Routinely Exploited for Initial Access

The cybersecurity authorities of the United States, Canada, New Zealand, the Netherlands, and the United Kingdom have issued a joint Cybersecurity Advisory CSA on 10 routinely exploited weak security controls, poor configurations, and bad practices that allow malicious actors to compromise...