INC Ransomware Ransom Note INC-README Written to Disk (via file_event)

PremiumReviewedSigma · High · v1
Product
windows
Category
file_event
Author
HuntRule
Published
2026-08-30
Updated
2026-08-30

ATT&CK techniques

Impact
  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

What it detects

This rule detects the INC ransomware dropping its INC-README ransom note across directories during encryption in the ransomware-as-a-service operation tracked by Acronis. Adversaries write the note to every touched folder alongside appending the .INC extension to encrypted files. The fixed note filename is a strong post-impact detection anchor.

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INC Ransomware Ransom Note INC-README Written to Disk (via file_event)
Pivot detection · T1486 · 9 related

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