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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
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Tactic: Collection
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Platforms: Linux, Windows, macOS
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System Requirements: Privileges to access network shared drive
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CAPEC ID: CAPEC-639
Version: 1.2
Created: 31 May 2017
Last Modified: 24 March 2020
Provided by LAYER 8

Procedure Examples

ID Name Description
G0007 APT28

APT28 has collected files from network shared drives.[1]
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.[2]
G0060 BRONZE BUTLER

BRONZE BUTLER has exfiltrated files stolen from file shares.[3]
G0114 Chimera

Chimera has collected data of interest from network shares.[4]
S0050 CosmicDuke

CosmicDuke steals user files from network shared drives with file extensions and keywords that match a predefined list.[5]
S0554 Egregor

Egregor can collect any files found in the enumerated drivers before sending it to its C2 channel.[6]

G0117 Fox Kitten

Fox Kitten has searched network shares to access sensitive documents.[7]
G0047 Gamaredon Group

Gamaredon Group malware has collected Microsoft Office documents from mapped network drives.[8]
G0045 menuPass

menuPass has collected data from remote systems by mounting network shares with net use and using Robocopy to transfer data.[9]
S0458 Ramsay

Ramsay can collect data from network drives and stage it for exfiltration.[10]

G0054 Sowbug

Sowbug extracted Word documents from a file server on a victim network.[11]

Mitigations

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

Detection

ID Data Source Data Component
DS0017 Command Command Execution
DS0022 File File Access
DS0033 Network Share Network Share Access

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

  1. NSA, CISA, FBI, NCSC. (2021, July). Russian GRU Conducting Global Brute Force Campaign to Compromise Enterprise and Cloud Environments. Retrieved July 26, 2021.
  2. Settle, A., et al. (2016, August 8). MONSOON - Analysis Of An APT Campaign. Retrieved September 22, 2016.
  3. Counter Threat Unit Research Team. (2017, October 12). BRONZE BUTLER Targets Japanese Enterprises. Retrieved January 4, 2018.
  4. Jansen, W . (2021, January 12). Abusing cloud services to fly under the radar. Retrieved January 19, 2021.
  5. F-Secure Labs. (2014, July). COSMICDUKE Cosmu with a twist of MiniDuke. Retrieved July 3, 2014.
  6. NHS Digital. (2020, November 26). Egregor Ransomware The RaaS successor to Maze. Retrieved December 29, 2020.
  1. CISA. (2020, September 15). Iran-Based Threat Actor Exploits VPN Vulnerabilities. Retrieved December 21, 2020.
  2. Boutin, J. (2020, June 11). Gamaredon group grows its game. Retrieved June 16, 2020.
  3. PwC and BAE Systems. (2017, April). Operation Cloud Hopper. Retrieved April 5, 2017.
  4. Sanmillan, I.. (2020, May 13). Ramsay: A cyber‑espionage toolkit tailored for air‑gapped networks. Retrieved May 27, 2020.
  5. Symantec Security Response. (2017, November 7). Sowbug: Cyber espionage group targets South American and Southeast Asian governments. Retrieved November 16, 2017.