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TrojanSpy.Win32.TRICKBOT.WLDC

May 04, 2020
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 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.

  TECHNICAL DETAILS

File Size:

1,801,216 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 May 2020

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 adds the following processes:

  • %System%\regsvr32.exe -s %User Temp%\29C205~1.DLL f1 %User Temp%\29C205~1.EXE@2852
  • %Windows%\SysWOW64\rundll32.exe %User Temp%\29C205~1.DLL,f0

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It creates the following folders:

  • %All Users Profile%\1ECC2684
  • %All Users Profile%\1ECC2684\8EC2DE78
  • %All Users Profile%\1ECC2684\777B15A3

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

Dropping Routine

This Trojan Spy drops the following files:

  • {malware path and file name}.exe.dll

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • {BLOCKED}.128.174
  • {BLOCKED}6.192
  • {BLOCKED}24.98
  • {BLOCKED}13.39
  • {BLOCKED}67.40
  • {BLOCKED}1.70.127
  • {BLOCKED}.179.31
  • {BLOCKED}198.119
  • {BLOCKED}3.34.199
  • {BLOCKED}1.181.118

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

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

Identify and terminate files detected as TrojanSpy.Win32.TRICKBOT.WLDC

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

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.
  • {malware path and file name}.exe.dll

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%\1ECC2684
  • %All Users Profile%\1ECC2684\8EC2DE78
  • %All Users Profile%\1ECC2684\777B15A3

Step 5

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.TRICKBOT.WLDC. 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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