Detectionhighexperimental

Process Execution From Shared Memory Directory

Detects the execution of a binary from the Linux shared memory directory /dev/shm. This directory is a tmpfs mount backed entirely by RAM and is abused by attackers for fileless malware staging because files written there never touch physical disk and may evade disk-based detection.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Stan BeukersCreated Sat Jun 205cd16c8f-44a6-4654-81e7-a84d6db507d4linux

Log Source

LinuxProcess Creation

ProductLinux← raw: linux

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        Image|startswith: '/dev/shm/'
    condition: selection

False Positives

Unlikely in production environments; some container runtimes or IPC frameworks may use /dev/shm for inter-process communication but should not spawn executables.

References

asiapacificdefencereporter.com