InformationalSplunk security content Teoderick Contreras +2

Windows Information Discovery Fsutil

Description

The following analytic identifies the execution of the Windows built-in tool FSUTIL with the "FSINFO" or "Volume" parameters, in order to discover file system and disk information. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs that include command-line details. Monitoring this activity is significant because FSUTIL can be abused by adversaries to gather detailed information about the file system, aiding in further exploitation. If confirmed malicious, this activity could enable attackers to map the file system, identify valuable data, and plan subsequent actions such as privilege escalation or persistence.

Detection logic

Detection requirements

Platform: ESXi IaaS Linux macOS Network Devices Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source category: crowdstrike_processrollup2 sysmon_eventid_1 windows_event_log_security_4688

Known benign triggers

No false positives have been identified at this time.

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
github.com/carlospolop/PEASS-ng/tree/master/winPEAS	Tool	16
learn.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil	Product documentation	Only this detection cites it
learn.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-volume	Product documentation	Only this detection cites it
www.microsoft.com/en-us/security/blog/2021/01/20/deep-dive-into-the-solorigate-second-stage-activation-from-sunburst-to-teardrop-and-raindrop/	Threat report	6
www.microsoft.com/en-us/security/blog/2022/10/14/new-prestige-ransomware-impacts-organizations-in-ukraine-and-poland/	Threat report	18

Detection rules

Windows Information Discovery Fsutil

Description

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules