huntrule

Windows Process Execution of Extexport.exe Suggesting Potential DLL Sideloading

Flags execution of Extexport.exe on Windows, which can be abused to side-load DLLs via crafted command lines.

FreeReviewedSigma · Medium · v5
Product
windows
Category
process_creation
Author
frack113, Nasreddine Bencherchali (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2021-11-26
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 flags execution of Extexport.exe by matching process creation events where the image path ends with \Extexport.exe or the OriginalFileName is extexport.exe. Extexport.exe can be abused to side load DLLs when invoked with specific command-line conditions, making its execution a potential indicator of stealthy payload loading attempts. Telemetry relied on is Windows process creation data including Image path and OriginalFileName.

Reporting behind it

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Windows Process Execution of Extexport.exe Suggesting Potential DLL Sideloading
Pivot detection · T1218 · 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.