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BackDoor-DKA!B4853915

This page shows details and results of our analysis on the malware BackDoor-DKA!B4853915

Threat Detail

Malware Type: Trojan

Malware Sub-type: N/A

Discovery Date: 2008-06-12

Next Steps:

Overview

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.


Minimum DAT

5316 (2008-06-12)

Updated DAT

5316 (2008-06-12)

 Minimum Engine

5.2.00

File Length

17151

 Description Added

2008-06-12

Description Modified

2008-06-12

Malware Proliferation

Characteristics

File PropertyProperty Value
File Name!itw#198.exe
McAfee DetectionBackDoor-DKA
Length17,151 bytes
CRC32B4853915
MD570a1b2053067a709ea085d52015d43ed
SHA1D999A905144C4FAEA96FC2CFCD3D1F0B4FD2FBDD

Other Common Detection Aliases

Company NameDetection Name
AhnLabWin-Trojan/Popwin.17151
AvastWin32:Trojan-gen {Other}
AVG (GriSoft)Dropper.Generic.UIR
AviraWorm/Winko.I.57
BitDefenderWin32.Worm.Winko.I
ClamAVPUA.Packed.UPack-2
Dr.WebTrojan.Popwin
EMSI SoftwareWorm.Win32.AutoRun.bsz
eSafe (Alladin)Win32.AutoRun.bsz
FortiNetW32/AutoRun.BTQ!worm
F-ProtW32/Worm.NMI (damaged)
KasperskyWorm.Win32.AutoRun.bsz
Microsoftbackdoor:win32/popwin.b
Normanw32/smalldoor.azcz
PandaW32/Lineage.HBO.worm
RisingWorm.Win32.Agent.zjk
SophosMal/Behav-010
SymantecTrojan Horse
Trend MicroWORM_AUTORUN.WU
Vba32Worm.Win32.AutoRun.bsz
V-BusterWorm.AutoRun.AXR
Vet (Computer Associates)
Win32/Pipown!generic

Avert® Labs has observed the following system activities:

ActivityRisk Level
Enumerates running Processes
Medium
Enumerates open windows
Low
Writes Executable in the Windows Folder
Low
Program often suspends itself
Informational

Other detections that have been observed.

File NameMcAfee Supported
c:\windows\system32\66905896.exe
BackDoor-DKA

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\66905896.exe
    • %WINDIR%\system32\c2f62ca4.dll

        • The following registry elements have been created:

      • HKEY_CURRENT_USER\system\currentcontrolset\services\542a8dab\
        • description = c2f62ca4
        • displayname = 542a8dab
        • imagepath = c:\windows\system32\66905896.exe -k
        • objectname = localsystem
      • hkey_users\.default\system\currentcontrolset\services\542a8dab\
        • description = c2f62ca4
        • displayname = 542a8dab
        • imagepath = c:\windows\system32\66905896.exe -k
        • objectname = localsystem

        • The following registry elements have been changed:

      • HKEY_LOCAL_MACHINE\software\microsoft\pchealth\errorreporting\
        • doreport = 0
        • showui = 0
      • HKEY_LOCAL_MACHINE\software\microsoft\windows nt\
        • reportbootok = 1
      • HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\advanced\folder\hidden\showall\
        • checkedvalue = 0
      • HKEY_LOCAL_MACHINE\system\controlset001\control\servicecurrent\
        • (default) = 9
      • HKEY_LOCAL_MACHINE\system\currentcontrolset\enum\root\legacy_542a8dab\0000\control\
        • activeservice = 542a8dab
      • HKEY_LOCAL_MACHINE\system\currentcontrolset\services\542a8dab\
        • description = c2f62ca4
        • displayname = 542a8dab
        • errorcontrol = 1
        • imagepath = c:\windows\system32\66905896.exe -k
        • objectname = localsystem
        • start = 2
        • type = 16

        • Symptoms

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

        Method 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.

        Removal

        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.

        Variants

        United States - English