PE64_EXPIRO.AR

This file infector arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It modifies registry entries to disable various system services. This action prevents most of the system functions to be used.

It connects to a website to send and receive information.

It modifies Internet Explorer security settings. This puts the affected computer at greater risk, as it allows malicious URLs to be accessed by the computer.

It steals certain information from the system and/or the user.

Arrival Details

This file infector 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 file infector drops the following file(s)/component(s):

• %Application Data%\{Volume serial of system folder}{number}.nls - non-malicious

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

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

• kkq-vx-mtx{number}

Other System Modifications

This file infector modifies registry entries to disable the following system services:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wscsvc
Start = "4"

(Note: The default value data of the said registry entry is 2.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\wuauserv
Start = "4"

(Note: The default value data of the said registry entry is 2.)

File Infection

This file infector infects the following file types:

• EXE

Backdoor Routine

This file infector connects to the following websites to send and receive information:

• {BLOCKED}oolz.biz
• {BLOCKED}meno.biz
• {BLOCKED}mavywy.biz
• {BLOCKED}ixumo.org
• {BLOCKED} vpyrnosnaj.cc
• {BLOCKED}e-icu.org
• {BLOCKED}unipenuq.ru
• {BLOCKED}cywy.org
• {BLOCKED}hwyjcohoc.biz
• {BLOCKED}zziquxmo.biz
• {BLOCKED}qroqiwy.net
• {BLOCKED}dsuly.ru
• {BLOCKED}adova.biz
• {BLOCKED}tibu-da.ws
• {BLOCKED}sinora.ru
• {BLOCKED}jify.biz
• {BLOCKED}axuzuhek.com
• {BLOCKED}tekasik.ws
• {BLOCKED}e-hi.ru
• {BLOCKED}azuqom.in
• {BLOCKED}yc-yzyn.ws
• {BLOCKED}abonho.ws
• {BLOCKED}atsamkihyf.org
• {BLOCKED}ebakhedci.ws

Web Browser Home Page and Search Page Modification

This file infector modifies Internet Explorer zone settings.

Information Theft

This file infector steals the following information:

• Certificates
• User credentials
• Information from Filezilla
• Windows Product ID
• Drive Volume Serial Number
• OS Version

Stolen Information

This file infector saves the stolen information in the following file:

• %Application Data%\kf{random number}z32.dl
• %Application Data%\dfl{random number}z32.dll
• %Application Data%\wsr{number}zt32.dll

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

NOTES:

This file infector infects that target files of shortcuts in the following locations:

• %Desktop%
• %Start Menu%\Programs

Since it infects Startup programs, it also serves as the auto-start mechanism of PE64_EXPIRO.AR.

It also monitors the presence of removable drives. If found, it infects .EXE files in the present removable drive. This serves as its propagation method.

It also searches drives from C:\ to Z:\ which it will also infect .EXE files if found. In this way, the drives shared through network will be infected. This also serves as its propagation method.

It also looks .EXE in the registered services and infect the target files.

It disables the following services:

• wscsvc
• WinDefend
• MsMpSvc
• NisServ
• gupdate
• gupdatem
• wuauserv

This file infector installs Mozilla Firefox and Google Chrome add-ons/extensions to monitor browser activity and redirect users to the following URLs:

• {BLOCKED}usepwukit.biz
• {BLOCKED}eson-damud.ws
• {BLOCKED}nobosi.net
• {BLOCKED}ajhobzaron.ws
• {BLOCKED}yqewejy.net
• {BLOCKED}pakpuhy.ru
• {BLOCKED}vyxot.ws
• {BLOCKED}awyrmepi.ru
• {BLOCKED}u-murno.biz
• {BLOCKED}vfocozenof.ru
• {BLOCKED}-uliku.ws
• {BLOCKED}-bobvo.ru
• {BLOCKED}xvivame.ru
• {BLOCKED}umezuhe.biz
• {BLOCKED}ycixpax.ru
• {BLOCKED}-hyvpa.ws
• {BLOCKED}ytijym.ws
• {BLOCKED}cel-pyqyc.ws
• {BLOCKED}ytujvila.in
• {BLOCKED}zati.cc
• {BLOCKED}xrymexyx.net
• {BLOCKED}isefufa.ru
• {BLOCKED}ditbexew.ws
• {BLOCKED}ajtidufub.ru
• {BLOCKED}qevvyho.biz
• {BLOCKED}ozyho.com
• {BLOCKED}pvejed.in
• {BLOCKED}zeqy-hohdi.ru
• {BLOCKED}u-py.net
• {BLOCKED}q-atuszyt.ru
• {BLOCKED}ycety.biz
• {BLOCKED}xinhiqno.cc
• {BLOCKED}piqfojar.ws
• {BLOCKED}utwimeju.ws
• {BLOCKED}-voxa.in
• {BLOCKED}bto-yvif.ru
• {BLOCKED}elzuhle.net
• {BLOCKED}ilypepo.net
• {BLOCKED}yfupawer.in
• {BLOCKED}awely.in
• {BLOCKED}lkifawe.ru
• {BLOCKED}yrwyzen.ru
• {BLOCKED}olhasy.biz
• {BLOCKED}vmucje.ws
• {BLOCKED}pytzaf-aqi.ru
• {BLOCKED}-de.in
• {BLOCKED}kaco-kuxe.ws
• {BLOCKED}ydwiveqxy.in
• {BLOCKED}litjase.com
• {BLOCKED}ebutih.ru
• {BLOCKED}yqyfi.net
• {BLOCKED}boroxu.org
• {BLOCKED}aqetyba.org
• {BLOCKED}uhimyvek.org
• {BLOCKED}faka.ru
• {BLOCKED}xfipe.in
• {BLOCKED}ispexysi.org
• {BLOCKED}vukym.in
• {BLOCKED}afallz.biz
• {BLOCKED}jetqys.com
• {BLOCKED}zpyprykem.biz