W2KM_POWLOAD.UHAOEFB

May 28, 2018
 Analysis by: Maureen Reyes
 ALIASES:

Trojan-Downloader.VBA.Agent (Ikarus), VBA/Agent.IBF!tr.dldr (Fortinet)

 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 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:

160,256 bytes

File Type:

DOC

Memory Resident:

No

Initial Samples Received Date:

18 May 2018

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.

Download Routine

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

  • %System Root%\Users\Public\{Random Numbers}.exe

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

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}qwd8ql.com/BUR/testv.php?l=bo8.yarn

NOTES:

This Trojan deletes the downloaded file after execution.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.274.08

FIRST VSAPI PATTERN DATE:

25 May 2018

VSAPI OPR PATTERN File:

14.275.00

VSAPI OPR PATTERN Date:

26 May 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

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]

Step 4

Scan your computer with your Trend Micro product to delete files detected as W2KM_POWLOAD.UHAOEFB. 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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