Zeek DCE-RPC spoolss and IRemoteWinspool Calls Indicating Windows Print-Related Persistence
Alerts on specific Zeek DCE-RPC endpoint/operation combinations linked to Windows persistence techniques.
- Product
- zeek
- Service
- dce_rpc
- Author
- @neu5ron, SOC Prime (SigmaHQ), DRL 1.1
- Published
- 2020-03-19
- Updated
- 2026-07-31
ATT&CK techniques
Persistence → Priv EscRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule matches Zeek DCE-RPC requests where specific endpoints and operations are used that align with Windows persistence techniques. Attackers can abuse these remote procedure calls to register or add print or monitor components and trigger persistence on the affected system. The detection relies on Zeek DCE-RPC telemetry that reports the RPC endpoint and operation names for remote calls.
Reporting behind it
Changelog
v2- v2Candidate ingested via manual entry.2026-07-31
- v1No changelog recorded for this version.2026-07-30
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
title: Zeek DCE-RPC spoolss and IRemoteWinspool Calls Indicating Windows Print-Related Persistence
id: 6fe619d6-a0a4-4b76-91da-7f2a86890669
status: test
description: This rule matches Zeek DCE-RPC requests where specific endpoints and operations are used that align with Windows persistence techniques. Attackers can abuse these remote procedure calls to register or add print or monitor components and trigger persistence on the affected system. The detection relies on Zeek DCE-RPC telemetry that reports the RPC endpoint and operation names for remote calls.
references:
- https://github.com/mitre-attack/bzar#indicators-for-attck-persistence
- https://github.com/SigmaHQ/sigma/blob/master/rules/network/zeek/zeek_dce_rpc_mitre_bzar_persistence.yml
author: "@neu5ron, SOC Prime, Huntrule Team"
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
license: DRL-1.1
related:
- id: 53389db6-ba46-48e3-a94c-e0f2cefe1583
type: derived