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W2KM_POWLOAD.THHAOHAP

November 28, 2018
 Analysis by: John Donnie Celestre
 ALIASES:

VBA/Agent.LMY!tr.dldr (FORTINET)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 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 downloaded files whose malicious routines are exhibited by the affected system.

  TECHNICAL DETAILS

File Size:

100,352 bytes

File Type:

DOC

Initial Samples Received Date:

27 Nov 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:

  • %User Temp%\rsh.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 executes downloaded files :

  • %User Temp%\rsh.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.)

whose malicious routines are exhibited by the affected system.

Other Details

This Trojan attempts to access the following websites to download files, which are possibly malicious:

  • http://sphi{BLOCKED}our.com/my1fugwV
  • http://egyptec{BLOCKED}urs.com/Aaw5tZ
  • http://sec{BLOCKED}tariaexte{BLOCKED}on.unt.edu.ar/wp-content/00002/l24wo4I
  • http://ventu{BLOCKED}ets.com/GeQdV4
  • http://now{BLOCKED}rus.ru/admini{BLOCKED}or/cache/tguHgQZ

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.652.08

FIRST VSAPI PATTERN DATE:

27 Nov 2018

VSAPI OPR PATTERN File:

14.653.00

VSAPI OPR PATTERN Date:

28 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

Search and delete these files

[ 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.  
  • %User Temp%\rsh.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as W2KM_POWLOAD.THHAOHAP. 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 5

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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