Repeated File Access to /zero or /null Devices

Detection of repeated access to /dev/null or /dev/zero, indicating a potential attempt to consume resources or overwhelm the system by performing unnecessary read/write operations.

STIX Pattern

[file:path = '/dev/null' OR file:path = '/dev/zero' AND file:access_time != 'expected_time']

SPARTA TTPs

ID Name Description
EX-0010 Inject Malicious Code Threat actors may rely on other tactics and techniques in order to inject malicious code into the victim spacecraft. This can be done via compromising the supply chain or development environment in some capacity or taking advantage of known commands. However, once malicious code has been uploaded to the victim spacecraft, the threat actor can then trigger the code to run via a specific command or wait for a legitimate user to trigger it accidently. The code itself can do a number of different things to the hosted payload, subsystems, or underlying OS.