huntrule

Windows File Creation: TieringEngineService.exe in RS- prefixed Temp Directory

Detects creation of TieringEngineService.exe under an RS-{GUID}-prefixed directory in %TEMP% on Windows.

FreeReviewedSigma · Critical · v5
Product
windows
Category
file_event
Author
Swachchhanda Shrawan Poudel (Nextron Systems), @unresolvedhost (SigmaHQ), DRL 1.1
Published
2026-04-17
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Defense Evasion

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule identifies creation of TieringEngineService.exe within a Windows path that contains the RS-{GUID} staging prefix and a Temp directory segment. Attackers may use staged executables in temporary locations to prepare follow-on execution while blending into common filesystem activity. Telemetry required includes file creation or file event logs with the full target file path, captured as TargetFilename.

Reporting behind it

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Suspicious Mimilite Credential Dumper Execution Writing KB-Named Output
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Windows File Creation: TieringEngineService.exe in RS- prefixed Temp Directory
Pivot detection · T1036.005 · 9 related

Changelog

v5
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. 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.