"The attack likely consists of a reconnaissance phase, where the attacker uses the Java Naming and Directory Interface (JNDI) via Log4Shell payloads to call back to malicious infrastructure," according to the alert. See Also: New OnDemand | A Better Way to Approach Data Backup and Recovery The web shells could allow unauthenticated attackers to remotely execute commands on a server affected by Log4Shell vulnerabilities to establish persistence within affected networks, the alert says, and adds that an attacker can use these web shells to deploy malicious software or ransomware and exfiltrate data.
National Health Service)Īttackers have been actively targeting Log4j, or Log4shell, vulnerabilities in the servers of virtualization solution VMware Horizon to establish persistent access via web shells, according to an alert by the U.K. A representative diagram of the Log4Shell attack on VMware Horizon (Source: U.K.
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