Cleo Autorun Exploitation via Healthcheck File Drop
- Product
- windows
- Category
- file_event
- Author
- HuntRule
- Published
- 2026-09-13
- Updated
- 2026-09-13
ATT&CK techniques
Initial AccessRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects healthcheck.txt or healthchecktemplate.txt files written into a Cleo autorun directory, the file drop that triggers command execution when exploiting CVE-2024-55956. Placing these files in the monitored autorun folder causes Cleo software to execute attacker Bash or PowerShell commands.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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Also included
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