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Virus Profile: Generic BackDoor!BA8873962F57

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 9/16/2012
Date Added: 9/16/2012
Origin: Unknown
Length: 974848
Type: Trojan
Subtype: -
DAT Required: 6837
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

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric BackDoor
Length974848 bytes
MD5ba8873962f573834be80d276b231622f
SHA132b092c24f12e64844d32f7dbff74106e5567bec


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareBackdoor.Win32.IRCFlood!IK
AVG (GriSoft)Dropper.Generic_c.GXN
aviraBDS/Agent.1260.A
KasperskyBackdoor.IRC.Zapchast.zwrc
BitDefenderBackdoor.Zapchast.PE
clamavTrojan.IRC.Zapchast-16
Dr.WebIRC.Diemen.1
F-ProtW32/Trojan-Gypikon-based.NC!Maximus
FortiNetBAT/Small.ASB!tr
MicrosoftBackdoor:BAT/Zapchast.I
SymantecIRC.Backdoor.Trojan
EsetREG/RunKeys.NAA
normanSuspicious_Gen3.XVTL
pandaBck/Zapchast.EX
SophosTroj/Zapchas-EU
Trend MicroMal_Zap
vba32Backdoor.IRC.Zapchast.zwrc
V-BusterTrojan.mIRC-Based.AM
Vet (Computer Associates)REG/IRCFlood

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Enumerates many system files and directories.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric BackDoor
McAfee SupportedGeneric BackDoor



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

32b092c24f12e64844d32f7dbff74106e5567bec

The following files have been added to the system:

  • %TEMP%\spoolsv\run.bat
  • %TEMP%\spoolsv\com.mrc
  • %TEMP%\spoolsv\users.ini
  • %TEMP%\spoolsv\mirc.ico
  • %TEMP%\spoolsv\mirc.ini
  • %TEMP%\spoolsv\servers.ini
  • %TEMP%\spoolsv\remote.ini
  • %TEMP%\spoolsv\popups.txt
  • %TEMP%\spoolsv\spoolsv.exe
  • %TEMP%\spoolsv\aliases.ini
  • %TEMP%\spoolsv\ident.txt
  • %TEMP%\spoolsv\control.ini
  • %TEMP%\spoolsv\desktop.ini
  • %TEMP%\spoolsv\a.reg
  • %TEMP%\spoolsv\xmas.jpg
The following files were temporarily written to disk then later removed:

  • %TEMP%\spoolsv\tmp3.$$$
  • %TEMP%\spoolsv\tmp5.$$$
  • %TEMP%\spoolsv\tmp2.$$$
  • %TEMP%\spoolsv\tmp4.$$$
  • %TEMP%\spoolsv\tmp6.$$$
  • %TEMP%\spoolsv\tmp1.$$$
The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MIRC\
  • HKEY_CURRENT_USER\SOFTWARE\MIRC\CHANNELS\
  • HKEY_CURRENT_USER\SOFTWARE\MIRC\LICENSE\
  • HKEY_CURRENT_USER\SOFTWARE\MIRC\LOCKOPTIONS\
  • HKEY_CURRENT_USER\SOFTWARE\MIRC\USERNAME\
  • HKEY_CURRENT_USER\SOFTWARE\WINRAR SFX\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.CHA\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.CHAT\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\DEFAULTICON\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\DDEEXEC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\DDEEXEC\APPLICATION\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\DDEEXEC\IFEXEC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CHATFILE\SHELL\OPEN\DDEEXEC\TOPIC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\DEFAULTICON\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\DDEEXEC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\DDEEXEC\APPLICATION\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\DDEEXEC\IFEXEC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\SHELL\OPEN\DDEEXEC\TOPIC\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\MIRC\
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SVCHOST\
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SVCHOST\PARAMETERS\
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\WINRAR SFX\C%%WINDOWS%TEMP%SPOOLSV% = %TEMP%\spoolsv\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\EDITFLAGS = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IRC\URL PROTOCOL
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\SPOOLSV = "%TEMP%\spoolsv\spoolsv.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\MIRC\DISPLAYNAME = mIRC
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\MIRC\UNINSTALLSTRING = "%TEMP%\spoolsv\spoolsv.exe" -uninstall
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SVCHOST\PARAMETERS\APPDIRECTORY = "%TEMP%\spoolsv\spoolsv.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SVCHOST\PARAMETERS\APPLICATION = "%TEMP%\spoolsv\spoolsv.exe"
The applications attempted the following network connection(s):

  • 194.109.20.**:6664
  • 194.109.20.**:6664 (irc) : NICK sebastiany
  • 194.109.20.**:6664 (irc) : USER wendy "" "194.109.20.90" :karley
  • 64.20.38.***:6667
   

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.