DNS Exfiltration and Tunneling Tools Execution — Sigma Rule

Rule metadata and linked tags

Author: Daniil Yugoslavskiy, oscd.community. Source status: test; severity: high. Source dates: 2019-10-24 / 2021-11-27.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d3dea25464811728a353cd68d47093684772398007aa7c58cf0be17d6b3e84dd

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: DNS Exfiltration and Tunneling Tools Execution
id: 98a96a5a-64a0-4c42-92c5-489da3866cb0
status: test
description: Well-known DNS Exfiltration tools execution
references:
    - https://github.com/iagox86/dnscat2
    - https://github.com/yarrick/iodine
author: Daniil Yugoslavskiy, oscd.community
date: 2019-10-24
modified: 2021-11-27
tags:
    - attack.exfiltration
    - attack.t1048.001
    - attack.command-and-control
    - attack.t1071.004
    - attack.t1132.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\iodine.exe'
        - Image|contains: '\dnscat2'
    condition: selection
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://github.com/iagox86/dnscat2
• https://github.com/yarrick/iodine