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TROJ_DROPPR.FA

October 08, 2012
 Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

9,728 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

30 Mar 2011

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_PIDIEF.OB

Installation

This Trojan drops and executes the following files:

  • %Temp%\~inst.vbs - detected by Trend Micro as VBS_WMIGHOST.A

(Note: %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.)

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.942.01

FIRST VSAPI PATTERN DATE:

30 Mar 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Remove malware files dropped/downloaded by TROJ_DROPPR.FA

Step 3

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %Temp%\~inst.vbs

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPR.FA. 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 this Knowledge Base page for more information.


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