Cервис управления информационной безопасностью
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MITRE ATT&CK - Инструмент Clambling
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Clambling
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Clambling

Clambling is a modular backdoor written in C++ that has been used by Threat Group-3390 since at least 2017.(Citation: Trend Micro DRBControl February 2020)
ID: S0660
Type: MALWARE
Platforms: Windows
Version: 1.0
Created: 12 Nov 2021
Last Modified: 23 Nov 2021

Techniques Used
Domain ID Name Use
Enterprise T1548 .002 Abuse Elevation Control Mechanism: Bypass User Account Control

Clambling has the ability to bypass UAC using a `passuac.dll` file.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)
Enterprise T1071 .001 Application Layer Protocol: Web Protocols

Clambling has the ability to communicate over HTTP.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1547 .001 Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder

Clambling can establish persistence by adding a Registry run key.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)
Enterprise T1059 .001 Command and Scripting Interpreter: PowerShell

The Clambling dropper can use PowerShell to download the malware.(Citation: Trend Micro DRBControl February 2020)
.003 Command and Scripting Interpreter: Windows Command Shell

Clambling can use cmd.exe for command execution.(Citation: Trend Micro DRBControl February 2020)

Enterprise T1543 .003 Create or Modify System Process: Windows Service

Clambling can register itself as a system service to gain persistence.(Citation: Talent-Jump Clambling February 2020)
Enterprise T1567 .002 Exfiltration Over Web Service: Exfiltration to Cloud Storage

Clambling can send files from a victim's machine to Dropbox.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)
Enterprise T1564 .001 Hide Artifacts: Hidden Files and Directories

Clambling has the ability to set its file attributes to hidden.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1574 .002 Hijack Execution Flow: DLL Side-Loading

Clambling can store a file named `mpsvc.dll`, which opens a malicious `mpsvc.mui` file, in the same folder as the legitimate Microsoft executable `MsMpEng.exe` to gain execution.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)
Enterprise T1056 .001 Input Capture: Keylogging

Clambling can capture keystrokes on a compromised host.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)
Enterprise T1566 .001 Phishing: Spearphishing Attachment

Clambling has been delivered to victim's machines through malicious e-mail attachments.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1055 .012 Process Injection: Process Hollowing

Clambling can execute binaries through process hollowing.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1569 .002 System Services: Service Execution

Clambling can create and start services on a compromised host.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1204 .002 User Execution: Malicious File

Clambling has gained execution through luring victims into opening malicious files.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1497 .003 Virtualization/Sandbox Evasion: Time Based Evasion

Clambling can wait 30 minutes before initiating contact with C2.(Citation: Trend Micro DRBControl February 2020)
Enterprise T1102 .002 Web Service: Bidirectional Communication

Clambling can use Dropbox to download malicious payloads, send commands, and receive information.(Citation: Trend Micro DRBControl February 2020)(Citation: Talent-Jump Clambling February 2020)

Groups That Use This Software
ID Name References
G0027 Threat Group-3390

(Citation: Profero APT27 December 2020) (Citation: Trend Micro Iron Tiger April 2021) (Citation: Trend Micro DRBControl February 2020)

References

  1. Lunghi, D. et al. (2020, February). Uncovering DRBControl. Retrieved November 12, 2021.
  2. Chen, T. and Chen, Z. (2020, February 17). CLAMBLING - A New Backdoor Base On Dropbox. Retrieved November 12, 2021.
  3. Global Threat Center, Intelligence Team. (2020, December). APT27 Turns to Ransomware. Retrieved November 12, 2021.
  4. Lunghi, D. and Lu, K. (2021, April 9). Iron Tiger APT Updates Toolkit With Evolved SysUpdate Malware. Retrieved November 12, 2021.
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