Data from Network Shared Drive

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.

ID: T1039
Sub-techniques:  No sub-techniques
Tactic: Collection
Platforms: Linux, Windows, macOS
System Requirements: Privileges to access network shared drive
Data Sources: Command: Command Execution, File: File Access, Network Share: Network Share Access
CAPEC ID: CAPEC-639
Version: 1.2
Created: 31 May 2017
Last Modified: 24 March 2020

Procedure Examples

ID Name Description
S0128 BADNEWS

When it first starts, BADNEWS crawls the victim's mapped drives and collects documents with the following extensions: .doc, .docx, .pdf, .ppt, .pptx, and .txt.[1]

G0060 BRONZE BUTLER

BRONZE BUTLER has exfiltrated files stolen from file shares.[2]

G0114 Chimera

Chimera has collected data of interest from network shares.[3]

S0050 CosmicDuke

CosmicDuke steals user files from network shared drives with file extensions and keywords that match a predefined list.[4]

S0554 Egregor

Egregor can collect any files found in the enumerated drivers before sending it to its C2 channel.[5]

G0117 Fox Kitten

Fox Kitten has searched network shares to access sensitive documents.[6]

G0047 Gamaredon Group

Gamaredon Group malware has collected Microsoft Office documents from mapped network drives.[7]

G0045 menuPass

menuPass has collected data from remote systems by mounting network shares with net use and using Robocopy to transfer data.[8]

S0458 Ramsay

Ramsay can collect data from network drives and stage it for exfiltration.[9]

G0054 Sowbug

Sowbug extracted Word documents from a file server on a victim network.[10]

Mitigations

This type of attack technique cannot be easily mitigated with preventive controls since it is based on the abuse of system features.

Detection

Monitor processes and command-line arguments for actions that could be taken to collect files from a network share. Remote access tools with built-in features may interact directly with the Windows API to gather data. Data may also be acquired through Windows system management tools such as Windows Management Instrumentation and PowerShell.

References