Suspicious Host Recon via ConvertFrom-Csv and ConvertTo-Json

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-08-15
Updated
2026-08-28

ATT&CK techniques

Discovery
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects PowerShell piping CSV-formatted system inventory output into ConvertFrom-Csv and ConvertTo-Json, a recon idiom used by the Interlock backdoor. The malware wrapped systeminfo, tasklist and drive enumeration in this JSON conversion pipeline to serialize host data for exfiltration to its C2. The structured serialization of native recon commands distinguishes automated collection from routine administration.

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Suspicious Host Recon via ConvertFrom-Csv and ConvertTo-Json
Pivot detection · T1082 · 9 related

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