Windows System Service Control Manager Event 7045 Scheduled Scan and UpdatMachine

Alerts on Windows service installation events for persistence-related scheduled services named SC Scheduled Scan or UpdatMachine.

FreeReviewedSigma · Critical · v5

Product: windows
Service: system
Author: Florian Roth (Nextron Systems), Markus Neis, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community (SigmaHQ), DRL 1.1
Published: 2018-03-23
Updated: 2026-07-31

Analysis Detection

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1053.005Scheduled Task
Persistence
Priv Esc
- T1053.005Scheduled Task
- T1543.003Windows Service
Defense Evasion
- T1112Modify Registry
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.004DNS
Exfiltration
Impact

What it detects

This rule identifies creation or configuration of Windows services via Service Control Manager (EventID 7045) for the specific service names "SC Scheduled Scan" and "UpdatMachine." Attackers can use scheduled service-based execution to establish persistence or repeated execution under the Windows Service infrastructure. Telemetry relies on Windows System logs capturing SCM events and the service name field for EventID 7045.

Reporting behind it

Related detections9 linkedT1112 — drag to rearrange

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Windows Security: Detect Scheduled Task Creation for OilRig-Related Persistence

Windows Scheduled Task Process Creating autoit3.exe for nslookup TXT Queries (OilRig)

Malicious Service DLL Hijack for Persistence via Lotus Blossom

Malicious Impacket SMBexec Service Creation - Registry (via registry_event)

Malicious Impacket SMBexec Service Registration - Native (via security)

Suspicious Hidden Scheduled Task via TaskCache Security Descriptor Manipulation

Suspicious Windows Service Trigger Configuration via Registry Modification

Suspicious Service Persistence Masquerading as DevQueryBrokerService

Windows System Service Control Manager Event 7045 Scheduled Scan and UpdatMachine

Pivot detection · T1112 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No 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.

windows-system-service-creation-for-scheduled-scan-and-updatmachine-53ba33fd

title: Windows System Service Control Manager Event 7045 Scheduled Scan and UpdatMachine
id: e3a373a7-3515-4605-8abf-07f4fd084957
related:
  - id: c0580559-a6bd-4ef6-b9b7-83703d98b561
    type: similar
  - id: 7bdf2a7c-3acc-4091-9581-0a77dad1c5b5
    type: similar
  - id: ce6e34ca-966d-41c9-8d93-5b06c8b97a06
    type: similar
  - id: 53ba33fd-3a50-4468-a5ef-c583635cfa92
    type: derived
status: test
description: This rule identifies creation or configuration of Windows services via Service Control Manager (EventID 7045) for the specific service names "SC Scheduled Scan" and "UpdatMachine." Attackers can use scheduled service-based execution to establish persistence or repeated execution under the Windows Service infrastructure. Telemetry relies on Windows System logs capturing SCM events and the service name field for EventID 7045.
references:
  - https://web.archive.org/web/20180402134442/https://nyotron.com/wp-content/uploads/2018/03/Nyotron-OilRig-Malware-Report-March-2018C.pdf
  - https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2018/TA/OilRig/win_system_apt_oilrig_mar18.yml
author: Florian Roth (Nextron Systems), Markus Neis, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community, Huntrule Team
date: 2018-03-23
modified: 2023-03-08
tags:
  - attack.privilege-escalation
  - attack.execution
  - attack.persistence
  - attack.defense-impairment
  - attack.g0049
  - attack.t1053.005
  - attack.s0111
  - attack.t1543.003
  - attack.t1112
  - attack.command-and-control
  - attack.t1071.004
  - detection.emerging-threats
logsource:
  product: windows
  service: system
detection:
  selection:
    Provider_Name: Service Control Manager
    EventID: 7045
    ServiceName:
      - SC Scheduled Scan
      - UpdatMachine
  condition: selection
falsepositives:
  - Unlikely
level: critical
license: DRL-1.1

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