BKDR_QAKBOT.BI

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

It opens random ports.

It saves downloaded files into certain folders.

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 saves downloaded files into certain folders.

Other Details

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

• Its downloaded component files are referenced in its code:
• alias__qbot.cb
• alias__qbotnti.exe
• _qbotinj.exe
• _qbot.dll
• alias__qbotinj.exe
• alias__qbot.dll
• _qbotnti.exe
• _qbotinj
• It then save these files in the following folder: %system Root%\\All Users\\_qbothome
• It searches for information from the registry key, HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Account Manager\\Accounts, which may include Outlook Express passwords, Internet Explorer AutoComplete passwords, and Internet Explorer Password-protected sites.
• It also 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/CM
• 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

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.

It does the following:

• Upon execution, this backdoor sends the following information to inform the remote host of the infection:
• ext_ip
• dnsname
• hostname
• country
• state
• city
• user
• domain
• is_admin
• os
• time
• qbot_version
• install_time
• It then saves its downloaded component files in the folder
• %system Root%\All Users\_qbothome