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TrojanSpy.Win32.ZBOT.CCD

May 17, 2019
 Analysis by: Noel Anthony Llimos
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

210,944 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

17 May 2019

Arrival Details

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan Spy drops the following files:

  • %ProgramData%\UpdateService\UpdateService.exe
  • %ProgramData%\UpdateService\UpdateService.exe.config
  • %ProgramData%\UpdateService\settings.dat

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.)

It adds the following processes:

  • "cmd" /c net group "domain admins" /domain
  • "%System%\schtasks.exe" /Delete /TN "UpdateService" /F
  • "%System%\schtasks.exe" /Create /RU SYSTEM /SC ONSTART /TN "UpdateService" /TR "\"%ProgramData%\UpdateService\UpdateService.exe\" -t"
  • "cmd" /c net group "domain users" /domain
  • net group "domain users" /domain
  • net group "domain admins" /domain
  • %System%\net1 group "domain admins" /domain
  • %System%\net1 group "domain users" /domain

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.)

It creates the following folders:

  • %All Users Profile%\UpdateService

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000, XP, and Server 2003, or C:\ProgramData on Windows Vista, 7, and 8. )

Other Details

This Trojan Spy does the following:

  • It adds the following scheduled task:
    • Task Name: UpdateService
    • Trigger: Repeat task every 10 Minutes
    • Actions: "%ProgramData%\UpdateService\UpdateService.exe"

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.)

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.114.03

FIRST VSAPI PATTERN DATE:

16 May 2019

VSAPI OPR PATTERN File:

15.115.00

VSAPI OPR PATTERN Date:

17 May 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %ProgramData%\UpdateService\UpdateService.exe
  • %ProgramData%\UpdateService\UpdateService.exe.config
  • %ProgramData%\UpdateService\settings.dat

Step 4

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %All Users Profile%\UpdateService

Step 5

Scan your computer with your Trend Micro product to clean files detected as TrojanSpy.Win32.ZBOT.CCD. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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