Detectionmediumtest

LOLBAS Data Exfiltration by DataSvcUtil.exe

Detects when a user performs data exfiltration by using DataSvcUtil.exe

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Launch

Ialle Teixeira, Austin SongerCreated Thu Sep 30Updated Mon May 16e290b10b-1023-4452-a4a9-eb31a9013b3awindows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

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_cli:
        CommandLine|contains:
            - '/in:'
            - '/out:'
            - '/uri:'
    selection_img:
        - Image|endswith: '\DataSvcUtil.exe'
        - OriginalFileName: 'DataSvcUtil.exe'
    condition: all of selection*

False Positives

DataSvcUtil.exe being used may be performed by a system administrator.

Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.

DataSvcUtil.exe being executed from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

References

lolbas-project.github.io

MITRE ATT&CK