Virus Profile: Cutwail!BBD59D95

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 5/22/2008
Date Added: 5/22/2008
Origin: Unknown
Length: 22016
Type: Trojan
Subtype: -
DAT Required: 5301
Removal Instructions
   
 
 
   

Description

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

   

Virus Characteristics

File PropertyProperty Value
File Name90cfb65e.exe
McAfee DetectionCutwail
Length22,016 bytes
CRC32BBD59D95
MD590CFB65E1341CC57E6F26B83E2B529F0
SHA1BE0BFAA79D5E275F14E412150E3DCA1DF38FE0C0

Other Common Detection Aliases

Company NameDetection Name
AhnLabDropper/Agent.22016.S
AvastWin32:Agent-WOD [Trj]
AVG (GriSoft)Downloader.Agent.AGFU
AviraTR/Drop.Cutwail.H.12
BitDefenderTrojan.Dropper.Cutwail.H
Dr.WebBackDoor.Bulknet.186
eSafe (Alladin)suspicious Trojan/Worm [101]
FortiNetCutwail!tr
KasperskyTrojan-Downloader.Win32.Agent.oif
MicrosoftTrojanDownloader:Win32/Cutwail.S
Normanw32/dloader.hbze
PandaTrj/Downloader.TOU
RisingTrojan.Win32.Undef.gax
SophosTroj/Pushdo-Gen
SymantecDownloader
Trend MicroPAK_Generic.001
Vba32Trojan-Downloader.Win32.Agent
V-Buster~Trojan.DL.Wigon.Gen.6
Vet (Computer Associates)
Win32/Cutwail.GF

Avert® Labs has observed the following system activities:

ActivityRisk Level
Modifies Memory of Other Processes
High
Enumerates open windows
Low
Writes Executable in the Windows Folder
Low

System Changes

These are general defaults for typical path variables. (Although they may differ, these examples are common.):
%WinDir% = \WINDOWS (Windows 9x/ME/XP/Vista), \WINNT (Windows NT/2000)
%SystemDir% = \WINDOWS\SYSTEM (Windows 98/ME), \WINDOWS\SYSTEM32 (Windows XP/Vista), \WINNT\SYSTEM32 (Windows NT/2000)
%ProgramFiles% = \Program Files

The following files have been added to the system:

  • %WINDIR%\system32\drivers\hbu46.sys
    • %WINDIR%\system32\winnt32.dll
      • The following registry elements have been created:

      • HKEY_LOCAL_MACHINE\software\microsoft\windows nt\currentversion\winlogon\notify\winnt32\
        • asynchronous = 0
        • dllname = winnt32.dll
        • id = 147
        • impersonate = 0
        • startshell = wleventstartshell
      • HKEY_LOCAL_MACHINE\system\controlset002\services\hbu46\
        • group = scsi class
        • imagepath = system32\drivers\hbu46.sys
        • start = 0
        • type = 1
      • HKEY_LOCAL_MACHINE\system\currentcontrolset\control\safeboot\minimal\hbu46.sys\
        • (default) = driver
      • HKEY_LOCAL_MACHINE\system\currentcontrolset\control\safeboot\network\hbu46.sys\
        • (default) = driver
      • The following registry elements have been changed:

      • HKEY_LOCAL_MACHINE\system\controlset001\services\hbu46\
        • group = scsi class
        • imagepath = system32\drivers\hbu46.sys
        • start = 0
        • type = 1
      • The applications created the following network connection(s):

      • 208.66.194.232 port (80) Protocol (http)
        • hxxp://208.66.194.232
          /**********************************************************************
          *************************
      • 208.66.195.15 port (80) Protocol (http)
        • hxxp://208.66.195.15
          /**********************************************************************
          *************************
      • 208.66.195.71 port (80) Protocol (http)
        • hxxp://208.66.195.71
          /**********************************************************************
          *************************
      • 217.170.77.146 port (80) Protocol (http)
        • hxxp://217.170.77.146
          /**********************************************************************
          *************************
      • 66.232.113.80 port (80) Protocol (http)
        • hxxp://66.232.113.80
          /**********************************************************************
          *************************
      • 75.126.22.226 port (80) Protocol (http)
        • hxxp://75.126.22.226
          /**********************************************************************
          *************************
      •    

        All Users:

        Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

        1.Disable System Restore .

        2.Update to current engine and DAT files for detection and removal.

        3.Run a complete system scan.

        Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

        1. Please go to the Microsoft Recovery Console and restore a clean MBR.

        On windows XP:

        Insert the Windows XP CD into the CD-ROM drive and restart the computer.
        When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
        Select the Windows installation that is compromised and provide the administrator password
        Issue 'fixmbr' command to restore the Master Boot Record
        Follow onscreen instructions
        Reset and remove the CD from CD-ROM drive.


        On Windows Vista and 7:

        Insert the Windows CD into the CD-ROM drive and restart the computer.
        Click on "Repair Your Computer"
        When the System Recovery Options dialog comes up, choose the Command Prompt.
        Issue 'bootrec /fixmbr' command to restore the Master Boot Record
        Follow onscreen instructions
        Reset and remove the CD from CD-ROM drive.

           

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