Analysis by: Michael Cabel
ALIASES:

Microsoft: Backdoor:Win32/Qakbot!inf; Sophos: Mal/QbotConf-A; Symantec: W32.Qakbot!conf

 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 is a configuration file dropped by variants of WORM_QAKBOT malware. It contains the following information:

  • URL where it can download an updated copy of its configuration file.
  • FTP and IRC information such as FTP site and IRC servers, user names and passwords.
  • Commands to execute its component files.

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

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: Varies
File Type: Other
Memory Resident: No
Initial Samples Received Date: 13 Nov 2010

Arrival Details

This Trojan may be dropped by other malware.

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

Other Details

This is the Trend Micro detection for:

  • Configuration files dropped by variants of the WORM_QAKBOT malware.

It does the following:

  • Contains the following information:
    • URL where it can download an updated copy of its configuration file.
    • FTP and IRC information such as FTP site and IRC servers, user names, and passwords.
    • Commands to execute its component files.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI PATTERN File: 07.618.04
VSAPI PATTERN Date: 13 Nov 2010
VSAPI PATTERN Date: 11/13/2010 12:00:00 AM

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_QAKCFG.AJ. 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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