Suspicious BlackSuit Ransomware Note and Encrypted File Artifacts via File Event

ATT&CK techniques

Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects creation of the readme.blacksuit.txt ransom note or files renamed with the .blacksuit extension, the on-disk artifacts left by BlackSuit ransomware during encryption. Their appearance across a host or share indicates an in-progress or completed encryption event.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

Possible Azure Storage Ransomware via Customer-Managed Key Encryption

Malicious Remote Encryptor Execution via WMIC Process Call Create (Chaos Ransomware)

Suspicious CyberLock Ransomware Encrypted File Creation

Rhysida Ransomware Encrypted File Extension Created

Phobos 8Base Ransomware Encrypted File Extension Created

Rhysida Ransomware Note CriticalBreachDetected.pdf Created

Possible Akira Ransomware Note or Encrypted Extension Creation

Malicious Storm-2603 Ransom Note File Creation

Possible Ransomware Note or Encrypted File Extension Creation

Suspicious BlackSuit Ransomware Note and Encrypted File Artifacts 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.

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 →