Malicious VoidLink Fileless Execution via memfd via Memory (via process_creation)
- Product
- linux
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-07-21
- Updated
- 2026-08-28
ATT&CK techniques
Defense EvasionRecon
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 processes executing from an anonymous in-memory file descriptor on Linux hosts. The VoidLink rootkit loader uses memfd_create and execveat to run its payload entirely from memory without touching disk. Execution backed by a memfd path is a strong indicator of fileless malware staging.
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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