Suspicious javaw.exe Executing JAR From Masqueraded Roaming Directory via Interlock Ransomware (via process_creation)

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 the Interlock Windows ransomware which runs through a legitimate javaw.exe copied into Roaming subfolders that impersonate FortiClient, VMware or a Welcome application to execute its JAR payload. Java runtimes staged under these AppData paths are not normal on endpoints. This execution indicates ransomware deployment.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

Malicious NailaoLocker Ransom Note and Encrypted File Creation (via file_event)

Malicious Ransom Note and Encrypted Extension via Hakuna Matata Variant (via file_event)

Malicious Hunters International Ransomware Execution via rundll32

Malicious WannaCry Decryptor Launching Tor via process_creation

Malicious WannaCry tasksche Execution from mssecsvc Service via process_creation

Malicious Shadow Copy Deletion and Recovery Inhibition via process_creation

Suspicious EKANS Ransomware Payload Dropped to Drive Root (via file_event)

Malicious BlackSuit Ransomware Execution via Process Creation

Suspicious BlackSuit Ransomware Note and Encrypted File Artifacts via File Event

Suspicious javaw.exe Executing JAR From Masqueraded Roaming Directory via Interlock Ransomware (via process_creation)

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 →