Fsutil Suspicious Invocation

Severity: high
Author: Ecco, E.M. Anhaus, oscd.community
Source: upstream

Detects suspicious parameters of fsutil (deleting USN journal, configuring it with small size, etc). Might be used by ransomwares during the attack (seen by NotPetya and others).

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1070` Indicator Removal
Impact	`T1485` Data Destruction

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\fsutil.exe'
OriginalFileName: fsutil.exe

Stage 2: `all of selection_cli`

or:
CommandLine|contains: createjournal
CommandLine|contains: deletejournal
CommandLine|contains: setZeroData

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`CommandLine`	match	`createjournal` `deletejournal` `setZeroData`
`Image`	ends_with	`\fsutil.exe` corpus 4 (sigma 4)
`OriginalFileName`	eq	`fsutil.exe` corpus 2 (sigma 2)