Suspicious Scheduled Task Running Regsvr32 with Extreme Duration by StaryDobry

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1053.005Scheduled Task
Persistence
- T1053.005Scheduled Task
Priv Esc
- T1053.005Scheduled Task
Defense Evasion
- T1218.010Regsvr32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a scheduled task that runs regsvr32 with an abnormally long duration and one-minute repetition interval, a persistence and proxy-execution pattern used by the StaryDobry miner campaign. Chaining regsvr32 silent DLL registration to a near-infinite recurring task keeps the XMRig loader running. This task configuration indicates malicious scheduled proxy execution.

Reporting behind it

Related detections9 linkedT1053.005 — drag to rearrange

Suspicious Scheduled Task Masquerading as Tpm-HASCertRetr by Careto

Suspicious Scheduled Task Masquerading as Microsoft Edge Update Machine MS

Malicious Tusk Persistence via FJ_load Scheduled Task

Malicious EastWind Persistence via schtasks DRMserver Task

Possible SocGholish Update Task Running Batch File at Highest Privileges (via process_creation)

Suspicious Scheduled Task Creation in Public Writable Directory via schtasks (via process_creation)

Suspicious Scheduled Task Executing Payload from AppData

Malicious DynamicWrapperX Registration via regsvr32 (via process_creation)

Suspicious Scheduled Task Creation With RMMProject Loader Task Names

Suspicious Scheduled Task Running Regsvr32 with Extreme Duration by StaryDobry

Pivot detection · T1053.005 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →