Arnold Chan
@slazTrusted contributorCompletionist
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7,399 detections
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Detects modifications to Windows LSA and LanmanServer registry keys (RestrictAnonymous, NullSessionPipes) in conjunction with ERAAgent.exe process execution, as well as ERAAgent creating named pipes accessible by anonymous logon, which may indicate configuration tampering to facilitate unauthorized access or credential collection.
Detects behavior where the ERAAgent process writes a file to disk and executes that same file shortly after (within 5 minutes). This pattern is consistent with staged payload delivery, decompression, or assembly often observed in malicious activity, specifically referencing SLEEPWALKER malware patterns.
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 a suspicious pattern associated with the SLEEPWALKER technique, involving multiple memory write operations followed by a memory protection change within an ERAAgent.exe process. This behavior suggests code injection or dynamic code loading within a process.
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 detects potentially malicious memory manipulation and thread execution activity originating from the ERAAgent.exe process. It specifically identifies when ERAAgent.exe calls VirtualProtect or VirtualAlloc to set memory as PAGE_EXECUTE_READWRITE, followed shortly by a CreateThread or CreateRemoteThread operation. This behavior is indicative of process injection or reflective code loading, where an executable image is manually mapped into memory and executed, bypassing traditional file-based detection.
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.
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 instances where 'ERAAgent.exe', part of the ESET Remote Administrator agent, loads the 'dpapi.dll' library from a location outside of standard Windows System directories (System32 or SysWOW64). Furthermore, the rule flags this behavior if the loaded 'dpapi.dll' file is either unsigned or contains an untrusted digital signature, which may indicate a malicious DLL side-loading or masquerading attempt to access protected system credentials.
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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