IonicWindSoftware

Hunt Hypothesis

This rule identifies the presence of IonicWindSoftware, a tool often used for web application testing or development, which may indicate unauthorized access or reconnaissance activities if found in unexpected locations. Proactively hunting for this signature helps the SOC team detect low-severity anomalies that could serve as initial footholds or tools for lateral movement within the Azure environment.

YARA Rule

rule IonicWindSoftware
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 9B DB E3 9B DB E2 D9 2D 00 [2] 00 55 89 E5 E8 }

condition:
		$a0 at pe.entry_point
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

• Microsoft Defender for Endpoint — Custom indicators / advanced hunting
• Email Gateway — Attachment scanning
• File Share Monitoring — Periodic scanning of shared drives
• YARA CLI — Manual threat hunting on endpoints

This rule contains 1 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Scenario: A developer or DevOps engineer uses the ionic CLI (Command Line Interface) to build, serve, or deploy an Ionic framework application locally or in a CI/CD pipeline. The ionic binary (often a Node.js wrapper) may be executed from a user profile directory or a temporary build folder, triggering a heuristic for unknown or recently created executables associated with web development tools.

  • Filter/Exclusion: Allow execution of node.exe or npm.cmd/npx.cmd when the parent process is a known IDE (e.g., code.exe, idea64.exe) or a CI agent (e.g., agent.exe, runner.exe). Alternatively, whitelist the specific ionic binary path if it is installed via a standard package manager in a controlled development directory (e.g., C:\Users\<dev>\AppData\Local\... or C:\tools\ionic\).

• Scenario: An IT administrator performs a software inventory scan or vulnerability assessment using tools like Tenable Nessus, Qualys, or Rapid7 InsightVM. These agents often download and execute temporary probe binaries or scripts to test specific software versions, which may include test payloads or generic wrappers that match the “IonicWindSoftware” signature if the rule is broad or based on string/section entropy rather than exact hash.

  • Filter/Exclusion: Exclude processes spawned by known vulnerability scanner agents (e.g., nessus.exe, qualys_agent.exe, insightvm_agent.exe) or processes running from standard scanner working directories (e.g., C:\Program Files\Tenable\..., C:\Program Files\Qualys\...).

• Scenario: A legacy or custom internal application named “IonicWind” or containing the string “IonicWindSoftware” in its metadata, version info, or file path is deployed via Group