Trojan.W97M.POWLOAD.NSFGAICF

November 12, 2018
 Analysis by: Carl Maverick Pascual
 ALIASES:

Trojan:O97M/Obfuse!rfn (Microsoft); VBA/TrojanDownloader.Agent.LGM (ESET)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

75,136 bytes

File Type:

DOC

Memory Resident:

No

Initial Samples Received Date:

09 Nov 2018

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

Download Routine

This Trojan saves the files it downloads using the following names:

  • %User Temp%\997.exe

(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}ze.com/8
  • http://{BLOCKED}ypharmacy.com.au/Sq
  • http://{BLOCKED}n.net/wpp-app/K
  • http://{BLOCKED}umum.com/ZQrQRYQ7
  • http://www.{BLOCKED}t.org.br/BtoVJ

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.614.08

FIRST VSAPI PATTERN DATE:

08 Nov 2018

VSAPI OPR PATTERN File:

14.615.00

VSAPI OPR PATTERN Date:

09 Nov 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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

Remove the malware/grayware file that dropped/downloaded Trojan.W97M.POWLOAD.NSFGAICF. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     
    • %User Temp%\997.exe

Step 4

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