Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This backdoor may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It reads its configuration file that contains commands and data to be sent to a remote server.

  TECHNICAL DETAILS

File Size: 81,920 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 28 Oct 2010
Payload: Downloads files, Terminates processes, Compromises system security

Arrival Details

This backdoor may arrive bundled with malware packages as a malware component.

It 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 backdoor is injected into the following processes running in memory:

  • EXPLORER.EXE
  • IEXPLORER.EXE

Backdoor Routine

This backdoor reads its configuration file that contains commands and data to be sent to a remote server.

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}cdc2121cdsfdfd.com
  • {BLOCKED}v.co.in
  • {BLOCKED}4.cn
  • {BLOCKED}1.co.in
  • {BLOCKED}2.co.in
  • {BLOCKED}3.in
  • {BLOCKED}3.com.ua

Process Termination

This backdoor terminates the following processes if found running in the affected system's memory:

  • agnitum
  • ahnlab
  • arcabit
  • avast
  • avg
  • avira
  • avp
  • bitdefender
  • bit9
  • castlecops
  • centralcommand
  • clamav
  • comodo
  • computerassociates
  • cpsecure
  • defender
  • drweb
  • emsisoft
  • esafe
  • eset
  • etrust
  • ewido
  • fortinet
  • f-prot
  • f-secure
  • gdata
  • grisoft
  • hacksoft
  • hauri
  • ikarus
  • jotti
  • k7computing
  • kaspersky
  • malware
  • mcafee
  • microsoft
  • networkassociates
  • nod32
  • norman
  • norton
  • panda
  • pctools
  • prevx
  • quickheal
  • rising
  • rootkit
  • securecomputing
  • sophos
  • spamhaus
  • spyware
  • sunbelt
  • symantec
  • threatexpert
  • trendmicro
  • virus
  • wilderssecurity
  • windowsupdate
  • msdev.exe
  • dbgview.exe
  • mirc.exe
  • ollydbg.exe
  • ccApp.exe
  • skype
  • R&Q.exe
  • photoed
  • outlook.exe
  • mmc.exe
  • ctfmon.exe

Download Routine

This backdoor connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}2.cn/cgi-bin/jl/jloader.pl
  • http://{BLOCKED}6.in/cgi-bin/jl/jloader.pl
  • http://{BLOCKED}ver.com.ua/cgi-bin/exhandler4.pl
  • http://{BLOCKED}ver.com.ua/cgi-bin/ss.pl
  • http://{BLOCKED}wthewhistle.com/cgi-bin/clientinfo3.pl

It connects to the following URL(s) to download its configuration file:

  • http://{BLOCKED}2.cn/
  • http://{BLOCKED}6.in/
  • http://{BLOCKED}ver.com
  • http://{BLOCKED}ver.com
  • http://{BLOCKED}wthewhistle.com
  • http://www.{BLOCKED}cdc2121cdsfdfd.com

  SOLUTION

Minimum Scan Engine: 8.900

Step 1

Scan your computer with your Trend Micro product and note files detected as BKDR_QAKBOT.EA

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Search and delete the file detected as BKDR_QAKBOT.EA

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files in the search result.

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_QAKBOT.EA. 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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