Arnold Chan
@slazTrusted contributorCompletionist
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7,544 detections
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Detects PDF documents that impersonate Notion invitation notifications and incorporate multiple redundant/overlapping URI links. This technique is used by the threat actor DOUBLOON DREDGER to facilitate EvilTokens device code harvesting campaigns.
Detects network activity associated with the NovaCookies phishing campaign, specifically identifying HTTP redirects, TLS SNI connections, or HTTP host headers pointing to infrastructure utilizing .vu top-level domains.
Detects anomalous authentication behavior indicative of an Adversary-in-the-Middle (AiTM) phishing kit. The rule identifies multiple password submission attempts (failures) followed by a successful authentication within a short period, consistent with an attacker testing multiple harvested credentials against an active session.
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 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 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 instances where the ESET Remote Administrator Agent (ERAAgent.exe) modifies registry keys related to Windows network security settings, such as LSA policies, NullSession pipes/shares, or server/workstation auto-sharing. These settings can be manipulated to weaken Windows security posture, potentially facilitating lateral movement or credential access.
Detects ERAAgent.exe performing suspicious dynamic API resolution for functions commonly used by the SLEEPWALKER malware (VirtualProtect, SetSecurityDescriptorDacl, and CryptGenRandom). By resolving these functions at runtime via GetProcAddress rather than including them in the static import table, the malware attempts to evade detection and analysis.
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.
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.
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