MITRE BZAR Indicators for Persistence — Sigma Rule

Rule metadata and linked tags

Author: @neu5ron, SOC Prime. Source status: test; severity: medium. Source dates: 2020-03-19 / 2021-11-27.

{
  "product": "zeek",
  "service": "dce_rpc"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1f0f4f4e9f10dfc1755d9890055e7b66a6aef76ecd8098ca2d8a76580772a2cb

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: MITRE BZAR Indicators for Persistence
id: 53389db6-ba46-48e3-a94c-e0f2cefe1583
status: test
description: 'Windows DCE-RPC functions which indicate a persistence techniques on the remote system. All credit for the Zeek mapping of the suspicious endpoint/operation field goes to MITRE.'
references:
    - https://github.com/mitre-attack/bzar#indicators-for-attck-persistence
author: '@neu5ron, SOC Prime'
date: 2020-03-19
modified: 2021-11-27
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.004
logsource:
    product: zeek
    service: dce_rpc
detection:
    op1:
        endpoint: 'spoolss'
        operation: 'RpcAddMonitor'
    op2:
        endpoint: 'spoolss'
        operation: 'RpcAddPrintProcessor'
    op3:
        endpoint: 'IRemoteWinspool'
        operation: 'RpcAsyncAddMonitor'
    op4:
        endpoint: 'IRemoteWinspool'
        operation: 'RpcAsyncAddPrintProcessor'
    op5:
        endpoint: 'ISecLogon'
        operation: 'SeclCreateProcessWithLogonW'
    op6:
        endpoint: 'ISecLogon'
        operation: 'SeclCreateProcessWithLogonExW'
    condition: 1 of op*
falsepositives:
    - Windows administrator tasks or troubleshooting
    - Windows management scripts or software
level: medium

Original YAML and metadata in JSON

False positives

• Windows administrator tasks or troubleshooting
• Windows management scripts or software

Source references

• https://github.com/mitre-attack/bzar#indicators-for-attck-persistence