T1039

Data from Network Shared Drive

Linux · macOS · Windowsnothing on this site yetT1039 on attack.mitre.org

Adversaries may search network shares on computers they have compromised to find files of interest. Sensitive data can be collected from remote systems via shared network drives (host shared directory, network file server, etc.) that are accessible from the current system prior to Exfiltration. Interactive command shells may be in use, and common functionality within cmd may be used to gather information.
MITRE ATT&CK 19.2, retrieved 2026-09-12

If this is happening now

Checklists and playbooks to open while the alert is still live.

Playbook for this stage

Suspected data theft by an insider

A resignation with unusual file access, a DLP alert, or an unexplained large transfer.

how MITRE says to see it

Detection Strategy for Data from Network Shared Drive

Monitoring of file access to network shares (e.g., C$, Admin$) followed by unusual read or copy operations by processes not typically associated with such activity (e.g., PowerShell, certutil).
Unusual access or copying of files from mounted network drives (e.g., NFS, CIFS/SMB) by user shells or scripts followed by large data transfer.
Detection of file access from mounted SMB shares followed by copy or exfil commands from Terminal or script interpreter processes.

The description, detection analytics and mitigations are reproduced from MITRE ATT&CK, version 19.2, under its terms of use. The checklists, hunts, labs and everything else linked here are this site’s.