TrojanSpy.Win32.CLIPBANKER.WLFI


 ALIASES:

HEUR:Trojan.Win32.Generic (KASPERSKY); Trojan:Win32/ClipBanker.RPA!MTB (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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 uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.

  TECHNICAL DETAILS

File Size:

9,728 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Sep 2022

Payload:

Steals information, Creates scheduled tasks, Drops files

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 folders:

  • %Application Data%\Microsoft\Network → if not existing

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It drops the following copies of itself into the affected system:

  • %Application Data%\Microsoft\Network\mstsca.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • %System%\schtasks.exe /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "%Application Data%\Microsoft\Network\mstsca.exe"

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It checks if it is installed or dropped in the following folder:

  • %Application Data%\Microsoft\Network → drops a copy if not

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It uses Windows Task Scheduler to create a scheduled task that executes the dropped copy.

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • M5/610HP/STAGE2

Information Theft

This Trojan Spy gathers the following data:

  • Clipboard Data

Other Details

This Trojan Spy does the following:

  • It modifies crypto wallet address (that meets certain string checks) found in the clipboard data with the following crypto wallet address:
    • {BLOCKED}VqkvN5M13xk8DWftjwC9G1F2w8Z
    • {BLOCKED}tXwoagBrgFsjNNkPZfrESydTD8JP
    • {BLOCKED}vykfse9s9llguez9cuyjmy092yeqkesl2r5v
    • {BLOCKED}9h4LxVtDigLQ79xQdGiJYC4oHis
    • {BLOCKED}QV7RDrNtSDRe9B2iH5r7yH4iMcxk
    • {BLOCKED}5lae8k7tzcw5lcjfvfs3n0nhf0z3cgrsz2dym
    • {BLOCKED}0e294DfCe4fE4Edf61b170c76770691aA111
    • {BLOCKED}bdHGMYGPvW5Uep45Jt9Rj2WvTV958B5G5vHnawZhA4UwoD53Tafn6GRmcGdoSFUfCQN6Xm37LBZZ6qNBorFw3b6s2
    • {BLOCKED}APHDLSq5pRdf8Eo6SLnKRJ8BNSYYnvPL6iJxGP4FBCBmkeV3CTSLCbk6uydxRnub4gLH6TBRycxSAQN2m1KcnhrSZ
    • {BLOCKED}aKG993LFJKCWz73PZqveWsnwRmGc
    • {BLOCKED}x4jwm700r2w6fneakg0r5pkg76vu7qkt6qv7zxza3qu3w9tyahu77x5a5n8nmvs78grv3a5eeupvh5qeuyv9mzpezuq60zykl
    • {BLOCKED}wUPEZDqNhACJ3ZT5NdVjkNffGAwa4Mc9N95udKWYzt1VnFngLMnPE
    • {BLOCKED}McNsBHsDyu1tXmJZjDpgbm3ftmTGN
    • {BLOCKED}ns6lfw4zs5hg4n85vdthaad7hq5m4gtkgf23

It adds the following scheduled tasks:

  • Task Name: Azure-Update-Task
    Trigger: Every 1 minute
    Task Action: %Application Data%\Microsoft\Network\mstsca.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.534.03

FIRST VSAPI PATTERN DATE:

27 Jun 2023

VSAPI OPR PATTERN File:

18.535.00

VSAPI OPR PATTERN Date:

28 Jun 2023

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

Restart in Safe Mode

[ Learn More ]

Step 4

Deleting Scheduled Tasks while in Safe Mode

  1. Still in safe mode, the following {Task Name}-{Task to be run} listed should be used in the steps identified below:  
    • Task Name: Azure-Update-Task
    • Task to be run: %Application Data%\Microsoft\Network\mstsca.exe
  2. For Windows 7 and Server 2008 (R2) users, click Start>Computer.
    • For Windows 8, 8.1, 10, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
  3. In the Search Computer/This PC input box, type:
    • %System%\Tasks\{Task Name}
  4. Once located, select the file then press SHIFT+DELETE to delete it.
  5. Open Registry Editor. To do this:
    • For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the Search input field, and press Enter.
    • For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower left corner of the screen, click Run, type regedit in the text box
  6. In the left panel of the Registry Editor window, double-click the following:
    • HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree>{Task Name}
  7. Locate the created entry and take note of the registry value's data:
    • ID={Task Data}
  8. After taking note of the data, delete the registry key:
    • HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tree>{Task Name}
  9. In the left panel of the Registry Editor window, double-click the following:
    • HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Schedule>TaskCache>Tasks
  10. Still in the left panel, locate and delete the registry key with the same name as the located Task Data in step #6:
    • ={Task Data}
  11. Close Registry Editor.

Step 5

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.
  • %Application Data%\Microsoft\Network\mstsca.exe

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.Win32.CLIPBANKER.WLFI. 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 this Knowledge Base page for more information.


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