TROJ_SMALL.QY

July 06, 2013
 ALIASES:

TrojanDropper:Win32/Small.EF (Microsoft); [0000b000.EXE]:Generic.ca (McAfee); Trojan Horse (Symantec); Trojan-Clicker.Win32.Small.hg (Kaspersky); Unclassified.Spyware (Sunbelt); Trojan horse Downloader.Agent.AIM.dropper (AVG)

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

  TECHNICAL DETAILS

File Size:

26,112 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

06 Jul 2013

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 creates the following folders:

  • %Windows%\Cache

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

Dropping Routine

This Trojan drops the following files:

  • %System Root%\drofkigxvh.tlb

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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.
  • %System Root%\drofkigxvh.tlb

Step 3

Search and delete this folder

[ 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.
  • %Windows%\Cache

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_SMALL.QY. 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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