Abnormal Frequency of Watchdog Timer Resets

Tracks abnormally frequent WDT resets, potentially signaling attempts to circumvent its functionality.

STIX Pattern

[x-opencti-watchdog:reset_frequency > 'expected_threshold']

SPARTA TTPs

ID Name Description
DE-0003.11 Watchdog Timer (WDT) for Evasion By modifying watchdog parameters or who “pets” them, an adversary shapes what evidence survives. Extending or disabling timeouts allows long-running processes to operate without forced resets that would expose abnormal CPU or power usage; conversely, shortening windows or relocating the petting source to a low-level ISR can induce frequent resets that wipe volatile traces, break correlation in logs, and explain anomalies as “spurious reboots.” In both directions, the watchdog becomes a timing tool for hiding activity rather than a guardrail against it.