arrow_back
search
close

TROJ_KATUSHA.K

October 08, 2012
 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 downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

194,560 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

30 Nov 2010

Payload:

Displays message/message boxes, Drops files, Modifies system registry

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be unknowingly downloaded by a user while visiting malicious websites.

It may be downloaded from the following remote site(s):

  • http://yourtube.{BLOCKED}loring.com/video2/video.php?q=1289224873

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{Malware name} = {Malware path and name}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
{Malware name} = {Malware path and name}

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
MediaPlayer\Setup\Files

Download Routine

As of this writing, the said sites are inaccessible.

Other Details

Based on analysis of the codes, it has the following capabilities:

  • Drops 6 copies of itself, one copy each in the random folders found in %Program Files%. The file name used is based on a file found inside the folder where a copy is to be dropped.

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It connects to the following URL(s) to check for an Internet connection:

  • http://yahoo.com
  • http://msn.com
  • http://google.com

It connects to the following possibly malicious URL:

  • http://{BLOCKED}.asia/httpss/v=%7brandom numbers}&step={random numbers}&hostid={random numbers}
  • http:/{BLOCKED}-foryou.com/httpss/v={random numbers}&step={random numbers}&hostid={random numbers}

Rogue Antivirus Routine

This Trojan displays the following fake alerts:

  • Your computer is being used as spamming machine. You can get sued for spam.
  • Your computer WILL BE DISCONNECTED FORM INTERNET BECAUSE SPAMMING OTHER PCs.
  • Your computer might be at risk
  • No firewall is turned on
  • Automatic Updates is turned off
  • Antivirus software might not be activated
  • Click this balloon to fix this problem.

  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

Identify and terminate files detected as TROJ_KATUSHA.K

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MediaPlayer\Setup
Files

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    {Malware name} = {Malware path and name}

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
    {Malware name} = {Malware path and name}

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_KATUSHA.K. 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.


Did this description help? Tell us how we did.