Arnold Chan
@slazTrusted contributorCompletionist
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Detects unauthorized remote access sessions within N-able N-central by monitoring the Windows Application log for events indicating usage of the default 'MSP Support' account or source IP addresses associated with active exploitation of CVE-2026-18577.
This rule detects the use of raw sockets by 'ERAAgent.exe' by monitoring for socket I/O control (Ioctl) operations involving 'SIO_RCVALL'. This configuration, often associated with promiscuous mode, allows an application to capture all network traffic received by the network interface, a behavior commonly used by network sniffing tools or malicious implants to intercept sensitive data.
Detects Python processes (python.exe, pythonw.exe, py.exe) executing with high or system integrity levels and interacting with named pipes, a technique often used for inter-process communication, persistence, or process injection.
Detects the ESET Remote Administrator (ERAAgent.exe) process loading the 'dpapisvc.dll' module. This behavior is indicative of potential DLL side-loading where an attacker places a malicious DLL with the same name as a legitimate system library in the agent's directory to achieve code execution.
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 ERAAgent.exe (ESET Remote Administrator Agent) interacting with suspicious named pipes (e.g., mojo, spoolss) and attempts to extract credentials from command line parameters, indicating potential credential dumping or lateral movement techniques using the agent process.
Detects the loading of compression libraries (such as lzma.dll or 7z.dll) by ERAAgent.exe followed by suspicious process or thread activity (e.g., remote thread creation, memory allocation). This pattern is often associated with the staging and execution of malicious payloads in memory.
This rule detects suspicious file system activity (creation, modification, or renaming) performed by the ESET Remote Administrator (ERA) Agent process, excluding files within standard ESET installation and ProgramData directories. This behavior may indicate an adversary attempting to leverage the legitimate ERA agent to perform unauthorized file operations or masquerading as the agent.
Detects periodic execution cycles of ERAAgent.exe that involve memory protection changes, characteristic of the SLEEPWALKER malware's XOR-decrypt-execute-reencrypt loop scheduled by a cron-like mechanism.
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