Cервис управления информационной безопасностью
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ZxShell

ZxShell is a remote administration tool and backdoor that can be downloaded from the Internet, particularly from Chinese hacker websites. It has been used since at least 2004.(Citation: FireEye APT41 Aug 2019)(Citation: Talos ZxShell Oct 2014)
ID: S0412
Associated Software: Sensocode
Type: MALWARE
Platforms: Windows
Version: 1.2
Created: 24 Sep 2019
Last Modified: 15 Apr 2022

Associated Software Descriptions
Name Description
Sensocode (Citation: Talos ZxShell Oct 2014)

Techniques Used
Domain ID Name Use
Enterprise T1134 .002 Access Token Manipulation: Create Process with Token

ZxShell has a command called RunAs, which creates a new process as another user or process context.(Citation: Talos ZxShell Oct 2014)

Enterprise T1071 .001 Application Layer Protocol: Web Protocols

ZxShell has used HTTP for C2 connections.(Citation: Talos ZxShell Oct 2014)

.002 Application Layer Protocol: File Transfer Protocols

ZxShell has used FTP for C2 connections.(Citation: Talos ZxShell Oct 2014)

Enterprise T1059 .003 Command and Scripting Interpreter: Windows Command Shell

ZxShell can launch a reverse command shell.(Citation: FireEye APT41 Aug 2019)(Citation: Talos ZxShell Oct 2014)(Citation: Secureworks BRONZEUNION Feb 2019)
Enterprise T1136 .001 Create Account: Local Account

ZxShell has a feature to create local user accounts.(Citation: Talos ZxShell Oct 2014)
Enterprise T1543 .003 Create or Modify System Process: Windows Service

ZxShell can create a new service using the service parser function ProcessScCommand.(Citation: Talos ZxShell Oct 2014)

Enterprise T1562 .001 Impair Defenses: Disable or Modify Tools

ZxShell can kill AV products' processes.(Citation: Talos ZxShell Oct 2014)

.004 Impair Defenses: Disable or Modify System Firewall

ZxShell can disable the firewall by modifying the registry key HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile.(Citation: Talos ZxShell Oct 2014)

Enterprise T1070 .001 Indicator Removal: Clear Windows Event Logs

ZxShell has a command to clear system event logs.(Citation: Talos ZxShell Oct 2014)

.004 Indicator Removal: File Deletion

ZxShell can delete files from the system.(Citation: FireEye APT41 Aug 2019)(Citation: Talos ZxShell Oct 2014)

Enterprise T1056 .001 Input Capture: Keylogging

ZxShell has a feature to capture a remote computer's keystrokes using a keylogger.(Citation: FireEye APT41 Aug 2019)(Citation: Talos ZxShell Oct 2014)

.004 Input Capture: Credential API Hooking

ZxShell hooks several API functions to spawn system threads.(Citation: Talos ZxShell Oct 2014)

Enterprise T1055 .001 Process Injection: Dynamic-link Library Injection

ZxShell is injected into a shared SVCHOST process.(Citation: Talos ZxShell Oct 2014)

Enterprise T1021 .001 Remote Services: Remote Desktop Protocol

ZxShell has remote desktop functionality.(Citation: Talos ZxShell Oct 2014)

.005 Remote Services: VNC

ZxShell supports functionality for VNC sessions.(Citation: Talos ZxShell Oct 2014)

Enterprise T1218 .011 System Binary Proxy Execution: Rundll32

ZxShell has used rundll32.exe to execute other DLLs and named pipes.(Citation: Talos ZxShell Oct 2014)

Enterprise T1569 .002 System Services: Service Execution

ZxShell can create a new service for execution.(Citation: Talos ZxShell Oct 2014)

Groups That Use This Software
ID Name References
G0001 Axiom

(Citation: Talos ZxShell Oct 2014) (Citation: Cisco Group 72)

G0096 APT41

(Citation: FireEye APT41 Aug 2019)

G0027 Threat Group-3390

(Citation: Secureworks BRONZEUNION Feb 2019)

References

  1. Allievi, A., et al. (2014, October 28). Threat Spotlight: Group 72, Opening the ZxShell. Retrieved September 24, 2019.
  2. Fraser, N., et al. (2019, August 7). Double DragonAPT41, a dual espionage and cyber crime operation APT41. Retrieved September 23, 2019.
  3. Counter Threat Unit Research Team. (2019, February 27). A Peek into BRONZE UNION’s Toolbox. Retrieved September 24, 2019.
  4. Esler, J., Lee, M., and Williams, C. (2014, October 14). Threat Spotlight: Group 72. Retrieved January 14, 2016.
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