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ThreatExpert's awareness of the file "chkdisk.dll":

Across all ThreatExpert reports, the file "chkdisk.dll" was mostly identified as a threat.
File "chkdisk.dll" has the following statistics:
Total number of reports analysed611,932
Number of cases that involved the file "chkdisk.dll"55
Number of incidents when this file was found to be a threat51
Statistical volume of cases when "chkdisk.dll" was a threat93%
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Notes:
  • Please note that the name of the file should NOT be used to define if it is legitimate or not. Such determination can only be made by observing its dynamic behaviour.
  • In order to check a file, please submit it to ThreatExpert.
  • For a comprehensive pro-active protection against threats, please consider ThreatFire - our behavioral antivirus solution.
The file "chkdisk.dll" is known to be created under the following filenames:
%Programs%\startup\chkdisk.dll
%System%\autochk.dll
%Temp%\ms.dll
%Temp%\msb.dll
%Temp%\rundll32.dll
%Temp%\update.dll
%Temp%\update_chk.dll
%UserProfile%\protect.dll
%Windir%\temp\msb.dll
Notes:
  • %Programs% is a variable that refers to the file system directory that contains the user's program groups. A typical path is C:\Documents and Settings\[UserName]\Start Menu\Programs.
  • %System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
  • %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).
  • %UserProfile% is a variable that specifies the current user's profile folder. By default, this is C:\Documents and Settings\[UserName] (Windows NT/2000/XP).
  • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

The file "chkdisk.dll" has the following possible country of origin:
OriginNumber of Incidents
Russian Federation15

The following threats are known to be associated with the file "chkdisk.dll":
Threat AliasNumber of Incidents
TrojanDropper:Win32/Opachki.A [Microsoft]51
Trojan-Dropper.Win32.Opachki [Ikarus]38
Trojan:Win32/Opachki.A [Microsoft]22
Mal/Generic-A [Sophos]21
Trojan Horse [Symantec]21
Mal/UnkPack-Fam [Sophos]17
Rootkit.Win32.Small.sy [Kaspersky Lab]16
Generic Dropper [McAfee]14
Trojan-Spy.Win32.Agent [Ikarus]10
Trojan.Fakeavalert [Symantec]7
Hacktool.Rootkit [Symantec]5
Win-Trojan/Xema.variant [AhnLab]5
Generic Dropper!s [McAfee]4
Rootkit.Small!sd6 [PC Tools]4
Trojan-Spy.Win32.Agent.aoox [Kaspersky Lab]4
Trojan-Spy.Win32.Agent.argt [Kaspersky Lab]4
Generic Dropper!v [McAfee]2
Generic PWS.y [McAfee]2
Generic PWS.y!k [McAfee]2
Generic.dx [McAfee]2
Mal/EncPk-KN [Sophos]2
Rootkit.Win32.Small.oj [Kaspersky Lab]2
Rootkit.Win32.Small.ra [Kaspersky Lab]2
Troj/Agent-IUK [Sophos]2
Trojan.Linkoptimizer.B [Symantec]2
Trojan.Win32.Opachki [Ikarus]2
Trojan-Spy.Win32.Agent.alnq [Kaspersky Lab]2
Trojan-Spy.Win32.Agent.amwj [Kaspersky Lab]2
Trojan-Spy.Win32.Agent.arfv [Kaspersky Lab]2
Win-Trojan/Agent.23552.SP [AhnLab]2
Win-Trojan/Agent.24064.JM [AhnLab]2
Win-Trojan/Downloader.21504.HY [AhnLab]2
Fraudtool.Win32.PCDefender [Ikarus]1
Generic Downloader.x!bdr [McAfee]1
Generic.dx!vx [McAfee]1
Hacktool.Rootkit!sd6 [PC Tools]1
Rootkit.Win32.Small [Ikarus]1
Rootkit.Win32.Small.ox [Kaspersky Lab]1
Trojan.Crypt [Ikarus]1
Trojan.Win32.Dllframe.h [Kaspersky Lab]1
Trojan-Downloader.Win32.Agent.cnrb [Kaspersky Lab]1
Trojan-Dropper.Win32.Emold [Ikarus]1
Trojan-Spy.Win32.Agent.alhq [Kaspersky Lab]1
Trojan-Spy.Win32.Agent.alsg [Kaspersky Lab]1
Trojan-Spy.Win32.Agent.amjg [Kaspersky Lab]1
Win-Trojan/Agent.24064.JD [AhnLab]1
Win-Trojan/Downloader.21504.HW [AhnLab]1
Win-Trojan/Downloader.21504.HZ [AhnLab]1
Win-Trojan/Downloader.22016.GZ [AhnLab]1