Threat Encyclopedia

TROJ_TDSS.ALJ

Publish date: October 09, 2012

ANALYSIS BY

MarfelTi


PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW


This Trojan may be dropped by other malware. It arrives as a component bundled with malware/grayware packages.

It is a component of other malware.

TECHNICAL DETAILS

File Size:

Varies

File Type:

DLL

Initial Samples Received Date:

12 May 2011

Arrival Details

This Trojan may be dropped by other malware.

It arrives as a component bundled with malware/grayware packages.

Installation

This Trojan is a component of other malware.

NOTES:

Enables the OS continue booting without crashing by replicating the system library kdcom.DLL. This malware is a component file of a BKDR_TDSS malware.

This file has usually two versions, one for 32-bit and one for 64-bit systems. This file is also responsible for loading the other component file RTKT_TDSS.ALJ.

SOLUTION

Minimum Scan Engine:

8.900

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_TDSS.ALJ

    RTKT_TDSS.ALJ
    BKDR_TDSS

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_TDSS.ALJ . 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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