calc.dll - Dangerous

%sysdir%\calc.dll

Free Download

Manual removal instructions:

Antivirus Report of %sysdir%\calc.dll:
%sysdir%\calc.dll Malware
%sysdir%\calc.dllDangerous
%sysdir%\calc.dllHigh Risk
%sysdir%\calc.dll
We suggest you to remove s_loader.exe from your computer as soon as possible.
S_loader.exe is Trojan/Backdoor.
Kill the process s_loader.exe and remove s_loader.exe from Windows startup.

Malware dropper:
s_loader.exe

Removed:
C:\Documents and Settings\Administrator\Application Data\seres.exe
C:\Documents and Settings\Administrator\Application Data\svcst.exe
C:\DOCUME~1\ADMINI~1\ntuser.dll
C:\WINDOWS\system32\calc.dll
C:\Program Files\AntivirusPro_2010\AntivirusPro_2010.exe
C:\Documents and Settings\Administrator\Start Menu\Programs\Startup\scandisk.dll
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Classification:
Code:
Antivirus Version Last Update Result
F-Secure 8.0.14470.0 2009.10.08 -
Kaspersky 7.0.0.125 2009.10.08 -
McAfee 5765 2009.10.08 Generic.dx!fpr
Microsoft 1.5101 2009.10.08 TrojanDownloader:Win32/FakeRean
NOD32 4491 2009.10.08 a variant of Win32/Kryptik.AMD
Symantec 1.4.4.12 2009.10.08 Packed.Generic.255

Additional information
File size: 62976 bytes
MD5 : 8a93d70504b354beec93a7ba2748c11a
SHA1 : a6024dde7f4b6abceabda203b12fd9d1d542e8b9
-------------------------------------------------------------------------------------
Installation
When the program is executed, it creates the following registry subkeys and values:

----------------------------------
Keys deleted:121
----------------------------------
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\AppMgmt
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Base
/.../
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{4D36E980-E325-11CE-BFC1-08002BE10318}
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{71A27CDD-812A-11D0-BEC7-08002BE2092F}
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{745A17A0-74D3-11D0-B6FE-00A0C90F57DA}
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\AFD
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\AppMgmt
/.../
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{4D36E980-E325-11CE-BFC1-08002BE10318}
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{71A27CDD-812A-11D0-BEC7-08002BE2092F}
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{745A17A0-74D3-11D0-B6FE-00A0C90F57DA}

----------------------------------
Keys added:3
----------------------------------
HKLM\SOFTWARE\Microsoft\DownloadManager
HKCU\Software\Microsoft\Internet Explorer\Download
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Associations

----------------------------------
Values deleted:119
----------------------------------
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{745A17A0-74D3-11D0-B6FE-00A0C90F57DA}\: "Human Interface Devices"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{71A27CDD-812A-11D0-BEC7-08002BE2092F}\: "Volume"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\{4D36E980-E325-11CE-BFC1-08002BE10318}\: "Floppy disk drive"
/.../
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Boot Bus Extender\: "Driver Group"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Base\: "Driver Group"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\AppMgmt\: "Service"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{745A17A0-74D3-11D0-B6FE-00A0C90F57DA}\: "Human Interface Devices"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{71A27CDD-812A-11D0-BEC7-08002BE2092F}\: "Volume"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\{4D36E980-E325-11CE-BFC1-08002BE10318}\: "Floppy disk drive"
/.../
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\AppMgmt\: "Service"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\AFD\: "Service"
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\AlternateShell: "cmd.exe"

----------------------------------
Values added:11
----------------------------------
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\calc: "rundll32.exe C:\WINDOWS\system32\calc.dll,_IWMPEvents@0"
HKCU\Software\Microsoft\Internet Explorer\Download\CheckExeSignatures: "no"
HKCU\Software\Microsoft\Internet Explorer\Download\RunInvalidSignatures: 0x00000001
HKCU\Software\Microsoft\Security Center\AntiVirusDisableNotify: 0x00000001
HKCU\Software\Microsoft\Security Center\FirewallDisableNotify: 0x00000001
HKCU\Software\Microsoft\Security Center\UpdatesDisableNotify: 0x00000001
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Associations\LowRiskFileTypes: "zip;.rar;.cab;.txt;.exe;.reg;.msi;.htm;.html;.gif;.bmp;.jpg;.avi;.mov;.mp3;.wav"
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Associations\SaveZoneInformation: 0x00000001
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\calc: "rundll32.exe C:\DOCUME~1\ADMINI~1\ntuser.dll,_IWMPEvents@0"
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\mserv: "C:\Documents and Settings\Administrator\Application Data\seres.exe"
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\svchost: "C:\Documents and Settings\Administrator\Application Data\svcst.exe"

----------------------------------
Values modified:0
----------------------------------

----------------------------------
Files added:9
----------------------------------
C:\Documents and Settings\Administrator\Application Data\lizkavd.exe
C:\Documents and Settings\Administrator\Application Data\seres.exe
C:\Documents and Settings\Administrator\Application Data\svcst.exe
C:\Documents and Settings\Administrator\Local Settings\Temp\nsrbgxod.bak
C:\Documents and Settings\Administrator\Local Settings\Temp\popka.exe
C:\Documents and Settings\Administrator\Local Settings\Temp\rundll32.dll
C:\Documents and Settings\Administrator\Start Menu\Programs\Startup\scandisk.dll
C:\Documents and Settings\Administrator\Start Menu\Programs\Startup\scandisk.lnk
C:\WINDOWS\system32\calc.dll

----------------------------------
Files deleted:1
----------------------------------
C:\sand-box\s_loader.exe

----------------------------------
Files [attributes?] modified:0
----------------------------------

----------------------------------
Folders added:0
----------------------------------

----------------------------------
Folders deleted:0
----------------------------------

----------------------------------
Total changes:264
----------------------------------

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Internet activity:
Code:
HTTP GET http://utorgtanedoskaw.com/files/avp21_d...
HTTP GET http://rtugamer5tobes.com/files/avp21_d_...
HTTP GET http://lersolamgaderg.com/files/avp21_d_...
HTTP GET http://orav4abustorabe.com/files/avp21_d...
HTTP GET http://orav4abustorabe.com/files/avp21_d...
HTTP GET http://orav4abustorabe.com/files/_AVE_._...
HTTP GET http://orav4abustorabe.com/files/_AVE_._...
HTTP GET http://orav4abustorabe.com/files/_Add_._...
HTTP GET http://orav4abustorabe.com/files/_GUI_._...
HTTP GET http://orav4abustorabe.com/files/_SC_._d...
HTTP GET http://orav4abustorabe.com/files/_Upd_._...
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Detected by UnHackMe:

Item Name: mserv
Author: Unknown
Related File: C:\Documents and Settings\Administrator\Application Data\seres.exe
Type: Registry Run

Item Name: svchost
Author: Unknown
Related File: C:\Documents and Settings\Administrator\Application Data\svcst.exe
Type: Registry Run

Item Name: seres.exe
Author: Unknown
Related File: C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\APPLICATION DATA\SERES.EXE
Type: Running Processes

Item Name: calc
Author: Microsoft
Related File: rundll32.exe C:\DOCUME~1\ADMINI~1\ntuser.dll,_IWMPEvents@0
Type: Registry Run

Item Name: calc
Author: Microsoft
Related File: rundll32.exe C:\WINDOWS\system32\calc.dll,_IWMPEvents@0
Type: Registry Run

After first reboot detected by UnHackMe:

Item Name: Antivirus Pro 2010
Author: vikbnerobeb
Related File: "C:\Program Files\AntivirusPro_2010\AntivirusPro_2010.exe" /hide
Type: Registry Run

Item Name: Antivirus Pro 2010
Author: vikbnerobeb
Related File: "C:\Program Files\AntivirusPro_2010\AntivirusPro_2010.exe" /hide
Type: Registry Run

Item Name: calc
Author:
Related File: rundll32.exe C:\WINDOWS\system32\calc.dll,_IWMPEvents@0
Type: Registry Run

Item Name: scandisk.dll
Author: Microsoft
Related File: C:\Documents and Settings\Administrator\Start Menu\Programs\Startup\scandisk.dll
Type: Startup Folder

Removal Results: Success
Number of reboot: 2
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Recommended software:
UnHackMe anti-rootkit and anti-malware
http://www.unhackme.com
RegRun Security Suite (Good choice for removal and protection)

Remove calc.dll now!

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