Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
173 detections
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Detects network activity related to the BEAST ransomware targeting VMware ESXi systems. The rule identifies attempts to stage encryption operations via SSH, including detecting references to known filenames ('encryptor.elf', 'beast_esxi') and the use of the 'vim-cmd' utility to power off virtual machines as part of the preparation for file encryption.
Detects instances where an identity with no prior compute-provisioning history in the last 14 days successfully provisions high-performance GPU-enabled virtual machines in Azure. This behavior is indicative of potential resource hijacking, such as LLMjacking, where compromised identities are leveraged to deploy infrastructure for unauthorized resource-intensive workloads.
Detects suspicious activity on VMware ESXi hosts involving the termination or unregistration of virtual machines via 'esxcli' or 'vim-cmd', correlated with high volumes of file modification or creation events (.vmdk or .vmx files) within a short window. This pattern often indicates attempts to disrupt virtual machines or inhibit system recovery by adversaries.
Detects successful administrative logins to VMware ESXi, vCenter, or related VDI infrastructure (Horizon) by users who have recently performed a password or MFA reset. This pattern is indicative of a helpdesk-based social engineering attack (vishing) or credential compromise where the attacker regains account access and immediately pivots to critical virtualization management infrastructure to facilitate ransomware deployment.
Detects successful administrative logins to VMware ESXi, vCenter, or related VDI infrastructure (Horizon) by users who have recently performed a password or MFA reset. This pattern is indicative of a helpdesk-based social engineering attack (vishing) or credential compromise where the attacker regains account access and immediately pivots to critical virtualization management infrastructure to facilitate ransomware deployment.
This rule detects device registration, joining, or enrollment events where the DeviceDisplayName follows a specific naming pattern (e.g., 'word-word-alphanumeric-word-hash'). It groups these events by device and user to track frequency, which can help identify potentially automated or malicious device registration behavior.
This rule monitors process command lines for identifiers related to virtual machine communication interfaces such as 'VMCI', 'AF_VSOCK', 'svm_cid', or 'vm:2'. It specifically targets both the ESET Remote Administrator (ERA) Agent and any other processes utilizing these communication mechanisms, which can be indicators of inter-process communication across virtual machine boundaries or potential hypervisor-related activity.
Detects the ESET Management Agent (ERAAgent.exe) initiating outbound network connections using non-standard socket families, specifically AF_VSOCK (virtual socket) or VMCI (Virtual Machine Communication Interface). These interfaces are typically used for inter-process communication between a host and a guest virtual machine, or between guest virtual machines, and may indicate malicious activity such as lateral movement from a virtualized environment, virtual machine escape attempts, or unauthorized communication within an ESXi host environment.
Detects the ESET Management Agent (ERAAgent.exe) initiating outbound network connections using non-standard socket families, specifically AF_VSOCK (virtual socket) or VMCI (Virtual Machine Communication Interface). These interfaces are typically used for inter-process communication between a host and a guest virtual machine, or between guest virtual machines, and may indicate malicious activity such as lateral movement from a virtualized environment, virtual machine escape attempts, or unauthorized communication within an ESXi host environment.
This rule monitors process command lines for identifiers related to virtual machine communication interfaces such as 'VMCI', 'AF_VSOCK', 'svm_cid', or 'vm:2'. It specifically targets both the ESET Remote Administrator (ERA) Agent and any other processes utilizing these communication mechanisms, which can be indicators of inter-process communication across virtual machine boundaries or potential hypervisor-related activity.
This rule monitors process command lines for identifiers related to virtual machine communication interfaces such as 'VMCI', 'AF_VSOCK', 'svm_cid', or 'vm:2'. It specifically targets both the ESET Remote Administrator (ERA) Agent and any other processes utilizing these communication mechanisms, which can be indicators of inter-process communication across virtual machine boundaries or potential hypervisor-related activity.
Detects evidence of sandbox or virtualization evasion by identifying discovery commands that query WMI hypervisor classes or common virtual machine hardware strings. This activity is considered a precursor (pre-detonation check) when followed by the execution of encoded PowerShell commands or Python scripts on the same host, which is characteristic of the CRPx0 ClickFix attack chain.
Detects evidence of sandbox or virtualization evasion by identifying discovery commands that query WMI hypervisor classes or common virtual machine hardware strings. This activity is considered a precursor (pre-detonation check) when followed by the execution of encoded PowerShell commands or Python scripts on the same host, which is characteristic of the CRPx0 ClickFix attack chain.
Detects evidence of sandbox or virtualization evasion by identifying discovery commands that query WMI hypervisor classes or common virtual machine hardware strings. This activity is considered a precursor (pre-detonation check) when followed by the execution of encoded PowerShell commands or Python scripts on the same host, which is characteristic of the CRPx0 ClickFix attack chain.
Detects the ESET Management Agent (ERAAgent.exe) initiating outbound network connections using non-standard socket families, specifically AF_VSOCK (virtual socket) or VMCI (Virtual Machine Communication Interface). These interfaces are typically used for inter-process communication between a host and a guest virtual machine, or between guest virtual machines, and may indicate malicious activity such as lateral movement from a virtualized environment, virtual machine escape attempts, or unauthorized communication within an ESXi host environment.
Detects anomalous child process creation (e.g., cmd.exe, powershell.exe, rundll32.exe) spawned by the VMware host process 'vmware-vmx.exe'. This behavioral pattern is a high-confidence indicator of potential guest-to-host virtual machine escape, specifically monitoring for activity associated with vulnerabilities like CVE-2026-59346.
Detects anomalous child process creation (e.g., cmd.exe, powershell.exe, rundll32.exe) spawned by the VMware host process 'vmware-vmx.exe'. This behavioral pattern is a high-confidence indicator of potential guest-to-host virtual machine escape, specifically monitoring for activity associated with vulnerabilities like CVE-2026-59346.
Detects the execution of common command-line utilities and tools used to enumerate virtual machines, hypervisors, and cloud instance information. Adversaries may perform this reconnaissance to identify virtualization environments, sandbox targets, or cloud infrastructure configurations.
Detects anomalous child process creation (e.g., cmd.exe, powershell.exe, rundll32.exe) spawned by the VMware host process 'vmware-vmx.exe'. This behavioral pattern is a high-confidence indicator of potential guest-to-host virtual machine escape, specifically monitoring for activity associated with vulnerabilities like CVE-2026-59346.
This rule monitors process command lines for identifiers related to virtual machine communication interfaces such as 'VMCI', 'AF_VSOCK', 'svm_cid', or 'vm:2'. It specifically targets both the ESET Remote Administrator (ERA) Agent and any other processes utilizing these communication mechanisms, which can be indicators of inter-process communication across virtual machine boundaries or potential hypervisor-related activity.
Detects high CPU utilization (exceeding 80%) on VMware ESXi hosts during non-business hours (between 22:00 and 06:00). Such activity may indicate unauthorized resource hijacking, such as cryptocurrency mining, or performance degradation due to unexpected processes.
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