TROJ_RENOS.QJKA

April 07, 2011
 Analysis by: Roland Dela Paz
 ALIASES:

Kaspersky : Trojan-Downloader.Win32.Pakes.bd

 PLATFORM:

Windows 2000, Windows XP, Windows 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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

18,944 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

07 Apr 2011

Payload:

Downloads files

Arrival Details

This Trojan may be downloaded from the following remote sites:

  • http://{BLOCKED}ath.cz.cc/out.php

Download Routine

This Trojan accesses the following websites to download files:

  • http://{BLOCKED}r.com/client1.exe

It saves the files it downloads using the following names:

  • %Temp%\_ex-68.exe

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

Trend Micro detects the dowloaded file as:

  • TROJ_FAKEAV.SMCO

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine:

8.900

Step 1

For Windows ME and XP 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_RENOS.QJKA

    TROJ_FAKEAV.SMCO

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_RENOS.QJKA 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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