Malicious BabyLockerKZ Run Key Persistence

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1547.001Registry Run Keys / Startup Folder
Priv Esc
- T1547.001Registry Run Keys / Startup Folder
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a CurrentVersion Run value named BabyLockerKZ. This MedusaLocker variant registered a BabyLockerKZ autorun entry to persist across reboots. A Run key carrying the malware family name is a direct persistence indicator tying host activity to this ransomware operation.

Reporting behind it

Related detections9 linkedT1547.001 — drag to rearrange

Suspicious Autorun Registry Persistence via sausageLoop Run Key

Suspicious Run Key Persistence Pointing To User-Writable Path

Malicious Ctrlpanel Run Key Autostart Persistence (via registry_set)

Persistence Run Key Pointing to svchost.exe in AppData Roaming

URL Shortcut File Created in Startup Folder for Persistence

Suspicious Run Key Persistence via UpdateCheck Value in Operation TrueChaos

Suspicious Run Key Persistence Pointing to AppData Local Copy

Malicious WezRat Persistence via Chrome Updater Run Key

Suspicious RoboForm Update Run Key Masquerade (via registry_set)

Malicious BabyLockerKZ Run Key Persistence

Pivot detection · T1547.001 · 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 →