BKDR_QAKBOT.AU

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

It opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

It requires its main component to successfully perform its intended routine.

Arrival Details

This backdoor may be dropped by other malware.

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

Installation

This backdoor adds the following mutexes to ensure that only one of its copies runs at any one time:

• ~sasg2136ggvsdswin

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{Random Name} = ""%System Root%\Documents And Settings\All Users\_qbothome\_qbotinj.exe", "%System Root%\Documents And Settings\All Users\_qbothome\_qbot.dll", /c {Random application name}"

Backdoor Routine

This backdoor opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

Download Routine

This backdoor connects to the following URL(s) to download its component file(s):

• http://{BLOCKED}n/cgi-bin/jl/jloader.pl?r=q
• http://{BLOCKED}2.cn/cgi-bin/jl/jloader.pl?r=3d
• http://{BLOCKED}-cosmetics.net/cgi-bin/clientinfo3.pl
• http://{BLOCKED}5.in/1
• http://{BLOCKED}5.in/cgi-bin/jl/jloader.pl?

Other Details

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

• Sends the following information to inform the remote host of the infection upon execution:
  • ext_ip
  • dnsname
  • hostname
  • country
  • state
  • city
  • user
  • domain
  • is_admin
  • os
  • time
  • qbot_version
  • install_time
• Refers to the following files in its code:
  • alias__qbot.cb
  • alias__qbotnti.exe
  • _qbotinj.exe
  • _qbot.dll
  • alias__qbotinj.exe
  • alias__qbot.dll
  • _qbotnti.exe
  • _qbotinj
• Saves the files in the following folder:
  • %system Root%\All Users\_qbothome
• Monitors affected users' browsing habits specifically on websites that contains any of the following strings:
  • cashproonline.bankofamerica.com
  • /cashplus/
  • ebanking-services.com
  • /cashman/
  • web-cashplus.com
  • treas-mgt.frostbank.com
  • business-eb.ibanking-services.com
  • treasury.pncbank.com
  • access.jpmorgan.com
  • ktt.key.com
  • onlineserv/
  • premierview.membersunited.org
  • directline4biz.com
  • onb.webcashmgmt.com
  • tmconnectweb
  • moneymanagergps.com
  • ibc.klikbca.com
  • directpay.wellsfargo.com
  • express.53.com
  • itreasury.regions.com
  • itreasurypr.regions.com
  • cpw-achweb.bankofamerica.com
  • businessaccess.citibank.citigroup.com
  • businessonline.huntington.com
• Searches for information from the registry key, HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts, which may include the following:
  • Outlook Express passwords
  • Internet Explorer AutoComplete passwords
  • Internet Explorer Password-protected sites

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

• http://www.{BLOCKED}cdc2121cdsfdfd.com
• http://{BLOCKED}eter.com

It requires its main component to successfully perform its intended routine.