Modified by: Clive Fuentebella
ALIASES:

SNH:Script [Dropper] (AVAST); TrojanDownloader:O97M/Powdow.ARJ!MTB (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

File Size: 544,266 bytes
File Type: DOC
Memory Resident: No
Initial Samples Received Date: 02 Mar 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 drops and executes the following files:

  • C:\BugExtended\23665_02032020\march022020.jse → detected as Trojan.JS.TRICKBOT.EAN
  • C:\BugExtended\32654_02032020\log022020.bat → runs C:\BugExtended\23665_02032020\march022020.jse

It adds the following processes:

  • cscript //nologo C:\BugExtended\23665_02032020\march022020.jse
  • cmd /c C:\BugExtended\32654_02032020\log022020.bat

It creates the following folders:

  • C:\BugExtended
  • C:\BugExtended\23665_02032020
  • C:\BugExtended\32654_02032020

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This Trojan does not exploit any vulnerability.

NOTES:
The document contains the following message details luring users to enable macro content:

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.720.04
FIRST VSAPI PATTERN DATE: 03 Mar 2020
VSAPI OPR PATTERN File: 15.721.00
VSAPI OPR PATTERN Date: 04 Mar 2020

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.
  • C:\BugExtended\23665_02032020\march022020.jse
  • C:\BugExtended\32654_02032020\log022020.bat

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.
  • C:\BugExtended
  • C:\BugExtended\23665_02032020
  • C:\BugExtended\32654_02032020

Step 5

Scan your computer with your Trend Micro product to delete files detected as Trojan.W97M.TRICKBOT.MS. 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:

Step 6

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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