November 2023 – Page 7 – Learn and Explore

November 16, 2023
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Zero-Day Flaw in Zimbra Email Software Exploited by Four Hacker Groups

A zero-day flaw in the Zimbra Collaboration email software was exploited by four different groups in real-world attacks to pilfer email data, user credentials, and authentication tokens. “Most of this activity occurred after the initial fix became public on GitHub,” Google Threat Analysis Group (TAG) said in a report shared with...

November 16, 2023
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Experts Uncover DarkCasino: New Emerging APT Threat Exploiting WinRAR Flaw

A hacking group that leveraged a recently disclosed security flaw in the WinRAR software as a zero-day has now been categorized as an entirely new advanced persistent threat (APT). Cybersecurity company NSFOCUS has described DarkCasino as an “economically motivated” actor that first came to light in 2021. “DarkCasino is an APT...

November 16, 2023
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CISA and FBI Issue Warning About Rhysida Ransomware Double Extortion Attacks

The threat actors behind the Rhysida ransomware engage in opportunistic attacks targeting organizations spanning various industry sectors. The advisory comes courtesy of the U.S. Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Multi-State Information Sharing and Analysis Center (MS-ISAC). “Observed as a ransomware-as-a-service (RaaS)

November 16, 2023
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Hackers Could Exploit Google Workspace and Cloud Platform for Ransomware Attacks

A set of novel attack methods has been demonstrated against Google Workspace and the Google Cloud Platform that could be potentially leveraged by threat actors to conduct ransomware, data exfiltration, and password recovery attacks. “Starting from a single compromised machine, threat actors could progress in several ways: they could...

November 16, 2023
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How to Automate the Hardest Parts of Employee Offboarding

According to recent research on employee offboarding, 70% of IT professionals say they’ve experienced the negative effects of incomplete IT offboarding, whether in the form of a security incident tied to an account that wasn’t deprovisioned, a surprise bill for resources that aren’t in use anymore, or a missed handoff...

November 16, 2023
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Russian Hackers Linked to ‘Largest Ever Cyber Attack’ on Danish Critical Infrastructure

Russian threat actors have been possibly linked to what’s been described as the “largest cyber attack against Danish critical infrastructure,” in which 22 companies associated with the operation of the country’s energy sector were targeted in May 2023. “22 simultaneous, successful cyberattacks against Danish critical infrastructure are not commonplace,”...

November 15, 2023
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U.S. Takes Down IPStorm Botnet, Russian-Moldovan Mastermind Pleads Guilty

The U.S. government on Tuesday announced the takedown of the IPStorm botnet proxy network and its infrastructure, as the Russian and Moldovan national behind the operation pleaded guilty. “The botnet infrastructure had infected Windows systems then further expanded to infect Linux, Mac, and Android devices, victimizing computers and other...

November 15, 2023
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New PoC Exploit for Apache ActiveMQ Flaw Could Let Attackers Fly Under the Radar

Cybersecurity researchers have demonstrated a new technique that exploits a critical security flaw in Apache ActiveMQ to achieve arbitrary code execution in memory. Tracked as CVE-2023-46604 (CVSS score: 10.0), the vulnerability is a remote code execution bug that could permit a threat actor to run arbitrary shell commands. It was patched...

November 15, 2023
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Three Ways Varonis Helps You Fight Insider Threats

What do basketball teams, government agencies, and car manufacturers have in common? Each one has been breached, having confidential, proprietary, or private information stolen and exposed by insiders. In each case, the motivations and methods varied, but the risk remained the same: insiders have access to too much data...

November 15, 2023
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Reptar: New Intel CPU Vulnerability Impacts Multi-Tenant Virtualized Environments

Intel has released fixes to close out a high-severity flaw codenamed Reptar that impacts its desktop, mobile, and server CPUs. Tracked as CVE-2023-23583 (CVSS score: 8.8), the issue has the potential to “allow escalation of privilege and/or information disclosure and/or denial of service via local access.” Successful exploitation of the vulnerability could also permit a...