TROJ_FAKEAV.BQT

This Trojan may be downloaded by other malware/grayware/spyware from remote sites. It may be unknowingly downloaded by a user while visiting malicious websites.

It installs a fake antivirus/antispyware software. It displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers. When users agree to buy the software, it connects to a certain URL.

Arrival Details

This Trojan may be downloaded by other malware/grayware/spyware from remote sites.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This Trojan drops the following component file(s):

• %Application Data%\Antivirus AntiSpyware 2011\65.mof
• %Application Data%\Antivirus AntiSpyware 2011\myhlp.chm
• %Application Data%\Antivirus AntiSpyware 2011\weexujds
• %Application Data%\Antivirus AntiSpyware 2011\weexujds\wewlrauzgds.cfg
• %Application Data%\Microsoft\Internet Explorer\Quick Launch\Antivirus AntiSpyware 2011.lnk
• %User Profile%\Desktop\Antivirus AntiSpyware 2011.lnk
• %User Profile%\Start Menu\Antivirus AntiSpyware 2011.lnk

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It creates the following folders:

• %Application Data%\Antivirus AntiSpyware 2011
• %Application Data%\Antivirus AntiSpyware 2011\weexujds

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
wewlrauzgds.cfg = "%Application Data%\Antivirus AntiSpyware 2011\AS2011.exe"

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\AS2011.DocHostUIHandler

HKEY_CLASSES_ROOT\CLSID\{3F2BBC05-40DF-11D2-9455-00104BC936FF}

HKEY_CURRENT_USER\Software\SE2010

It adds the following registry entries:

HKEY_CLASSES_ROOT\AS2011.DocHostUIHandler
(Default) = "Implements DocHostUIHandler"

HKEY_CLASSES_ROOT\AS2011.DocHostUIHandler\Clsid
(Default) = "{3F2BBC05-40DF-11D2-9455-00104BC936FF}"

HKEY_CLASSES_ROOT\CLSID\{3F2BBC05-40DF-11D2-9455-00104BC936FF}
(Default) = "Implements DocHostUIHandler"

HKEY_CLASSES_ROOT\CLSID\{3F2BBC05-40DF-11D2-9455-00104BC936FF}\
LocalServer32
(Default) = "%Application Data%\Antivirus AntiSpyware 2011\AS2011.exe"

HKEY_CLASSES_ROOT\CLSID\{3F2BBC05-40DF-11D2-9455-00104BC936FF}\
ProgID
(Default) = "AS2011.DocHostUIHandler"

HKEY_CURRENT_USER\Software\SE2010
LastVFC = "{value}"

HKEY_CURRENT_USER\Software\SE2010
LastD = "{value}"

HKEY_CURRENT_USER\Software\SE2010
LastScan = "{date and time}"

Process Termination

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

• accesschk.exe
• AccessEnum.exe
• acdseepro3.exe
• acdseepro4.exe
• AcroRd32.exe
• ADExplorer.exe
• ADInsight.exe
• adrestore.exe
• AdvancedDVDPlayer.exe
• aim.exe
• arp.exe
• at.exe
• Autologon.exe
• autoruns.exe
• autorunsc.exe
• Bginfo.exe
• bitcomet.exe
• bitspirit.exe
• bittorrent.exe
• Cacheset.exe
• calc.exe
• chrome.exe
• Clockres.exe
• CloneCD.exe
• cmd.exe
• cmdkey.exe
• computerdefaults.exe
• conhost.exe
• Contig.exe
• control.exe
• Coreinfo.exe
• ctrl2cap.exe
• Dbgview.exe
• defragui.exe
• Desktops.exe
• DevicePairingWizard.exe
• digitaleditions.exe
• disk2vhd.exe
• diskext.exe
• Diskmon.exe
• DiskView.exe
• dmaster.exe
• du.exe
• dxdiag.exe
• efsdump.exe
• eventvwr.exe
• excel.exe
• far.exe
• fdm.exe
• find.exe
• flashget.exe
• freecell.exe
• ftp.exe
• FullTiltPoker.exe
• GOM.exe
• GoogleEarth.exe
• handle.exe
• help.exe
• hex2dec.exe
• hrtzzm.exe
• Icq.exe
• Illustrator.exe
• infium.exe
• ipconfig.exe
• isoburn.exe
• journal.exe
• junction.exe
• LA.exe
• ldmdump.exe
• Listdlls.exe
• livekd.exe
• LoadOrd.exe
• logonsessions.exe
• miranda32.exe
• mirandaim.exe
• mmc.exe
• movefile.exe
• moviemk.exe
• mplay32.exe
• mplayer2.exe
• mplayerc.exe
• msaccess.exe
• msconfig.exe
• mshearts.exe
• msiexec.exe
• msmsgs.exe
• MsnMsgr.Exe
• mspaint.exe
• mspub.exe
• MSWorks.exe
• Nero.exe
• NeroExpressPortable.exe
• netsh.exe
• netstat.exe
• nfs.exe
• notepad.exe
• nslookup.exe
• ntfsinfo.exe
• OIS.exe
• outlook.exe
• pagedfrg.exe
• pendmoves.exe
• Photoshop.exe
• picasaphotoviewer.exe
• pinball.exe
• ping.exe
• pipelist.exe
• PokerStars.exe
• portmon.exe
• powercfg.exe
• PowerDVD.exe
• powerpnt.exe
• POWERPOI.exe
• powershell.exe
• procdump.exe
• procexp.exe
• procexp64.exe
• ProcFeatures.exe
• psexec.exe
• psfile.exe
• psgetsid.exe
• Psinfo.exe
• pskill.exe
• pslist.exe
• psloggedon.exe
• psloglist.exe
• pspasswd.exe
• psservice.exe
• psshutdown.exe
• pssuspend.exe
• qip2010.exe
• QuickTimePlayer.exe
• realplay.exe
• RealPlayer.exe
• RecordingManager.exe
• reg.exe
• RegCloneCD.exe
• RegDelNull.exe
• regedit.exe
• regedt32.exe
• reget.exe
• regetdx.exe
• regjump.exe
• resmon.exe
• RootkitRevealer.exe
• route.exe
• rstrui.exe
• RwcRun.exe
• RWipeRun.exe
• sdelete.exe
• setup_wm.exe
• ShareEnum.exe
• ShellRunas.exe
• shvlzm.exe
• sidebar.exe
• sigcheck.exe
• Skype.exe
• skypePM.exe
• sndvol32.exe
• sol.exe
• spider.exe
• streams.exe
• strings.exe
• sync.exe
• taskhost.exe
• taskkill.exe
• tasklist.exe
• taskmgr.exe
• tcpvcon.exe
• Tcpview.exe
• telnet.exe
• thebat.exe
• totalcmd.exe
• tracert.exe
• trillian.exe
• tvp.exe
• utorrent.exe
• vmmap.exe
• vmware.exe
• Volumeid.exe
• whois.exe
• winamp.exe
• WindowsAnytimeUpgradeUI.exe
• windvd.exe
• winmail.exe
• winmine.exe
• Winobj.exe
• WinRAR.exe
• WINWORD.exe
• wmplayer.exe
• word.exe
• wow.exe
• wscript.exe
• wupdmgr.exe
• ypager.exe
• ZoomIt.exe

Rogue Antivirus Routine

This Trojan displays the following fake alerts:

It installs a fake antivirus/antispyware software.

It displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

When users agree to buy the software, it connects to the following URL to continue the purchase:

• http://{BLOCKED}ftwaresecurity.com