Potential EtherHiding C2 via Curl JSON-RPC Request

Last updated a month ago on 2026-09-18

Created a month ago on 2026-09-08

About

Detects when curl or nscurl is spawned by a shell or osascript to make a JSON-RPC request to a blockchain endpoint for command and control purposes. Adversaries may leverage blockchain smart contracts as a covert C2 channel to retrieve commands or payload staging information, as observed in ClickFix campaigns.

Tags

Domain: EndpointOS: macOSUse Case: Threat DetectionTactic: Command and ControlTactic: ExecutionData Source: Elastic DefendRule Type: Event Correlation (EQL)Platform: macOSLanguage: eql

Severity

high

Risk Score

MITRE ATT&CK™

Command and Control (TA0011)(external, opens in a new tab or window)

↳ Web Service (T1102)(external, opens in a new tab or window)

Execution (TA0002)(external, opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(external, opens in a new tab or window)

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type: Event Correlation Rule
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: logs-endpoint.events.process-*
Related Integrations: endpoint(external, opens in a new tab or window)
Query

✄𐘗text code block:
✄𐘗process where host.os.type == "macos" and event.type == "start" and event.action == "exec" and
  process.name in ("curl", "nscurl") and
  process.parent.name in ("osascript", "bash", "sh", "zsh") and
  process.command_line like~ ("*eth_call*", "*\"jsonrpc\"*")

Install detection rules in Elastic Security

Detect Potential EtherHiding C2 via Curl JSON-RPC Request in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).