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Removal instructions for Defensevirus

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#1
Metallica

Metallica

    Spyware Veteran

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Content is republished with permission from Malwarebytes.

What is Defensevirus?

The Malwarebytes research team has determined that Defensevirus is a fake anti-malware application. These so-called "rogues" use intentional false positives to convince users that their systems have been compromised. Then they try to sell you their software, claiming it will remove these threats. In extreme cases the false threats are actually the very trojans that advertise or even directly install the rogue. You are strongly advised to follow our removal instructions below.

How do I know if I am infected with Defensevirus?

This is how the main screen of the rogue application looks:

Posted Image

You will find this icon in your taskbar:

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And see these warnings:

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Posted Image

How did Defensevirus get on my computer?

Rogue programs use different methods for spreading themselves. This particular one was downloaded from their site.

How do I remove Defensevirus?

Our program Malwarebytes' Anti-Malware can detect and remove this rogue application.
  • Please download Malwarebytes' Anti-Malware to your desktop.
  • Double-click mbam-setup.exe and follow the prompts to install the program.
  • At the end, be sure a check-mark is placed next to the following:

    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
  • If an update is found, it will download and install the latest version.
  • Once the program has loaded, select Perform quick scan, then click Scan.
  • When the scan is complete, click OK, then Show Results to view the results.
  • Be sure that everything is checked, and click Remove Selected. Reboot your computer if prompted.
  • When completed, a log will open in Notepad. The rogue application should now be gone.

Is there anything else I need to do to get rid of Defensevirus?

  • No, Malwarebytes' Anti-Malware removes Defensevirus completely.

How would the full version of Malwarebytes' Anti-Malware help protect me?

We hope our application has helped you eradicate this malicious software. If your current security solution let this infection through, you might please consider purchasing the FULL version of Malwarebytes' Anti-Malware for additional protection.

As you can see below the full version of Malwarebytes' Anti-Malware would have protected you against the Defensevirus rogue. It would have warned you before the rogue could install itself, giving you a chance to stop it before it became too late.


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Technical details for experts

Signs in a HijackThis log:
C:\Program Files\DefenseVirus\DefenseVirus.exe

O4 - HKLM\..\Run: [DefenseVirusMain] "C:\Program Files\DefenseVirus\DefenseVirus.exe" /Boot

Alterations made by the installer:
  File System
  ===============
    In the existing folder C:\Documents and Settings\{username}\Application Data\Microsoft\Internet Explorer\Quick Launch
      Adds the file DefenseVirus.lnk"="12:17 07/08/11 758 bytes
    Adds the folder C:\Documents and Settings\{username}\Local Settings\Temp\DefenseVirus
      Adds the file top_txt3.bmp"="15:23 27/04/10 20216 bytes
      Adds the file title7.bmp"="18:48 08/04/11 10296 bytes
      Adds the file title6.bmp"="18:48 08/04/11 10296 bytes
      Adds the file title5.bmp"="18:48 08/04/11 10296 bytes
      Adds the file title4.bmp"="18:47 08/04/11 10296 bytes
      Adds the file title3.bmp"="18:46 08/04/11 10296 bytes
      Adds the file title2.bmp"="18:46 08/04/11 10296 bytes
      Adds the file title1.bmp"="17:09 24/06/11 12056 bytes
      Adds the file skin.xml"="18:36 24/06/11 19807 bytes
      Adds the file show_realtime.bmp"="18:28 24/06/11 27654 bytes
      Adds the file service_bg.bmp"="19:39 02/06/10 352772 bytes
      Adds the file scan_txt_disc2.bmp"="15:52 27/04/10 3540 bytes
      Adds the file scan_txt_disc1.bmp"="15:52 27/04/10 2252 bytes
      Adds the file scan_txt4.bmp"="15:53 27/04/10 1496 bytes
      Adds the file scan_txt3.bmp"="15:53 27/04/10 1496 bytes
      Adds the file scan_txt2.bmp"="15:52 27/04/10 1496 bytes
      Adds the file scan_txt1.bmp"="15:52 27/04/10 1496 bytes
      Adds the file scan_list_bgdel.bmp"="12:20 22/06/11 581456 bytes
      Adds the file scaning_progresbar.bmp"="14:42 04/06/10 524 bytes
      Adds the file report.bmp"="12:05 22/06/11 5096 bytes
      Adds the file repair_msg_bg2.bmp"="12:17 22/06/11 156512 bytes
      Adds the file repair_msg_bg.bmp"="12:16 22/06/11 156512 bytes
      Adds the file Pop_Tray_bg.bmp"="12:21 22/06/11 300296 bytes
      Adds the file pop_end_bg.bmp"="12:16 22/06/11 156512 bytes
      Adds the file pattern_layer.bmp"="15:06 07/05/10 60792 bytes
      Adds the file minmize.bmp"="12:01 22/06/11 488 bytes
      Adds the file menu6.bmp"="19:26 08/04/11 80216 bytes
      Adds the file menu5.bmp"="19:24 08/04/11 80216 bytes
      Adds the file menu4.bmp"="19:23 08/04/11 80216 bytes
      Adds the file menu3.bmp"="19:22 08/04/11 80216 bytes
      Adds the file menu2.bmp"="19:21 08/04/11 80216 bytes
      Adds the file menu1.bmp"="19:00 08/04/11 82220 bytes
      Adds the file maxmize.bmp"="18:41 24/11/05 584 bytes
      Adds the file main_bt3.bmp"="11:01 09/04/11 5356 bytes
      Adds the file main_body.bmp"="17:09 24/06/11 598472 bytes
      Adds the file logo.bmp"="17:09 24/06/11 30056 bytes
      Adds the file last_scan_date.bmp"="15:53 27/04/10 1748 bytes
      Adds the file engine_ver.bmp"="15:53 27/04/10 2132 bytes
      Adds the file cscenter.bmp"="12:04 22/06/11 5096 bytes
      Adds the file common_exit.bmp"="22:02 14/12/05 452 bytes
      Adds the file common_dlg_backpattern.bmp"="16:41 27/04/10 30056 bytes
      Adds the file close.bmp"="12:01 22/06/11 488 bytes
      Adds the file btn_update.bmp"="18:57 07/04/11 4084 bytes
      Adds the file btn_s_yesdel.bmp"="18:53 07/04/11 8680 bytes
      Adds the file btn_s_ok.bmp"="18:53 07/04/11 4016 bytes
      Adds the file btn_s_nodel.bmp"="18:52 07/04/11 8680 bytes
      Adds the file btn_s_no.bmp"="18:51 07/04/11 4016 bytes
      Adds the file btn_s_del.bmp"="18:50 07/04/11 4016 bytes
      Adds the file btn_stop.bmp"="18:56 07/04/11 31256 bytes
      Adds the file btn_set.bmp"="10:51 09/04/11 31256 bytes
      Adds the file btn_searchpattern.bmp"="18:54 07/04/11 7976 bytes
      Adds the file btn_restore.bmp"="10:50 09/04/11 31256 bytes
      Adds the file btn_restart.bmp"="18:38 07/04/11 31256 bytes
      Adds the file btn_rescan_cancel.bmp"="10:49 09/04/11 4016 bytes
      Adds the file btn_rescan.bmp"="10:48 09/04/11 4016 bytes
      Adds the file btn_repair_msg_del.bmp"="16:07 07/05/10 8624 bytes
      Adds the file btn_repair_msg_cancel.bmp"="16:08 07/05/10 8624 bytes
      Adds the file btn_popup_end.bmp"="12:03 01/09/10 9164 bytes
      Adds the file btn_popup_cancel2.bmp"="12:04 01/09/10 9164 bytes
      Adds the file btn_main6.bmp"="18:36 07/04/11 158456 bytes
      Adds the file btn_main5.bmp"="18:34 07/04/11 158456 bytes
      Adds the file btn_main4.bmp"="18:28 07/04/11 202856 bytes
      Adds the file btn_main3.bmp"="18:24 07/04/11 202856 bytes
      Adds the file btn_main2.bmp"="18:17 07/04/11 7976 bytes
      Adds the file btn_main1.bmp"="18:17 07/04/11 7976 bytes
      Adds the file btn_exit.bmp"="14:24 30/11/05 16472 bytes
      Adds the file btn_Dscan.bmp"="10:51 09/04/11 31256 bytes
      Adds the file btn_Ddel2.bmp"="13:39 09/06/10 32364 bytes
      Adds the file btn_Ddel.bmp"="10:45 09/04/11 31256 bytes
      Adds the file btn_Dcancel.bmp"="10:44 09/04/11 31256 bytes
      Adds the file btn_cure.bmp"="17:47 07/04/11 31256 bytes
      Adds the file bg.bmp"="18:27 24/06/11 1076178 bytes
      Adds the file 6_body1.bmp"="16:36 24/06/11 411534 bytes
      Adds the file 5.bmp"="18:58 02/06/10 456 bytes
      Adds the file 4_body1.bmp"="17:16 07/04/11 375764 bytes
      Adds the file 4.bmp"="18:57 02/06/10 456 bytes
      Adds the file 3.bmp"="18:56 02/06/10 456 bytes
      Adds the file 2_body1.bmp"="16:58 07/04/11 4496 bytes
      Adds the file 2.bmp"="18:56 02/06/10 456 bytes
      Adds the file 1_body1.bmp"="16:57 07/04/11 4496 bytes
      Adds the file 1.bmp"="18:54 02/06/10 456 bytes
    Adds the folder C:\Documents and Settings\{username}\Local Settings\Temp\DefenseVirus\list_control
      Adds the file VerticleScrollBarUpArrow.bmp"="18:35 27/04/10 716 bytes
      Adds the file VerticleScrollbarTop.bmp"="18:35 27/04/10 672 bytes
      Adds the file VerticleScrollBarThumb.bmp"="18:35 27/04/10 848 bytes
      Adds the file VerticleScrollBarSpan.bmp"="18:33 27/04/10 276 bytes
      Adds the file VerticleScrollBarDownArrow.bmp"="18:35 27/04/10 672 bytes
      Adds the file VerticleScrollbarBottom.bmp"="18:35 27/04/10 672 bytes
      Adds the file right_pattern.bmp"="18:32 27/04/10 1232 bytes
      Adds the file pattern.bmp"="05:58 10/12/05 2344 bytes
      Adds the file left_pattern.bmp"="18:32 27/04/10 192 bytes
      Adds the file HorizontalScrollBarThumb.bmp"="18:34 27/04/10 840 bytes
      Adds the file HorizontalScrollBarSpan.bmp"="18:34 27/04/10 840 bytes
      Adds the file HorizontalScrollBarRightArrow.bmp"="18:35 27/04/10 728 bytes
      Adds the file HorizontalScrollBarLeftArrow.bmp"="18:35 27/04/10 728 bytes
      Adds the file height_blank.bmp"="23:13 09/12/05 120 bytes
      Adds the file ColumnHeaderStart.bmp"="19:12 28/04/10 464 bytes
      Adds the file ColumnHeaderSpan.bmp"="19:12 28/04/10 508 bytes
      Adds the file ColumnHeaderEnd.bmp"="19:12 28/04/10 680 bytes
    Adds the folder C:\Documents and Settings\{username}\Local Settings\Temp\nsy2.tmp
      Adds the file stack.dll"="12:15 07/08/11 10240 bytes
    In the existing folder C:\Documents and Settings\{username}\Start Menu
      Adds the file DefenseVirus.lnk"="12:17 07/08/11 1622 bytes
    Adds the folder C:\Documents and Settings\{username}\Start Menu\Programs\DefenseVirus
      Adds the file DefenseVirus.lnk"="12:17 07/08/11 1634 bytes
      Adds the file DefenseVirus ����.lnk"="12:17 07/08/11 1613 bytes
    Adds the folder C:\Program Files\DefenseVirus
      Adds the file Uninstall.exe"="12:17 07/08/11 217980 bytes
      Adds the file SoDVUpdateServer.dat"="09:15 21/07/11 208 bytes
      Adds the file partner.ini"="12:17 07/08/11 23 bytes
      Adds the file Ep.dat"="09:16 21/07/11 336 bytes
      Adds the file DVUpdateServer.dat"="09:16 21/07/11 640 bytes
      Adds the file DVEngine.dll"="10:54 21/07/11 659456 bytes
      Adds the file DVAutoUpdate.exe"="10:56 21/07/11 462848 bytes
      Adds the file DefenseVirus.exe"="09:26 21/07/11 516096 bytes
      Adds the file conf.ini"="12:18 07/08/11 225 bytes
    Adds the folder C:\Program Files\DefenseVirus\temp
    Adds the folder C:\Program Files\DefenseVirus\skin
      Adds the file default.avs"="09:16 21/07/11 367308 bytes
    Adds the folder C:\Program Files\DefenseVirus\etc
      Adds the file dvReg.exe"="09:16 21/07/11 278528 bytes
      Adds the file DVmonRemote.dll"="09:16 21/07/11 225280 bytes
      Adds the file dvMon.exe"="09:16 21/07/11 290816 bytes
      Adds the file DVFilterDriver.SYS"="09:16 21/07/11 43008 bytes
    Adds the folder C:\Program Files\DefenseVirus\db
      Adds the file vsdb.dat"="09:16 21/07/11 172472 bytes
      Adds the file pwdb.dat"="09:16 21/07/11 342528 bytes
      Adds the file inter.dll"="09:16 21/07/11 231616 bytes
      Adds the file filter.dll"="09:16 21/07/11 232 bytes
      Adds the file avmon.dat"="09:16 21/07/11 226368 bytes
      Adds the file adtc.dat"="09:16 21/07/11 9976 bytes
      Adds the file adsub.dat"="09:16 21/07/11 226728 bytes
      Adds the file addb.dat"="09:16 21/07/11 907384 bytes
    Adds the folder C:\Program Files\DefenseVirus\Lang
      Adds the file kr.xml"="09:16 21/07/11 8893 bytes

  Registry
  ===============
    [HKEY_LOCAL_MACHINE\SOFTWARE\DefenseVirus]
      "Install_Dir"="'C:\Program Files\DefenseVirus'"
      "ver"="'20110722'"
      "pid"="'home'"
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{3263ADD6-E93D-48EA-9A47-3845C82BF8CA}]
      "Compatibility Flags"="1024"
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
      "DefenseVirusMain"="'"C:\Program Files\DefenseVirus\DefenseVirus.exe" /Boot'"
    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefenseVirusMain]
      "DisplayIcon"="'"C:\Program Files\DefenseVirus\Uninstall.exe"'"
      "UninstallString"="'"C:\Program Files\DefenseVirus\Uninstall.exe"'"
      "DisplayName"="'DefenseVirus'"


Malwarebytes' Anti-Malware log:
Malwarebytes' Anti-Malware 1.51.1.1800
www.malwarebytes.org

Database version: 7400

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

8/7/2011 12:37:39 PM
mbam-log-2011-08-07 (12-37-39).txt

Scan type: Quick scan
Objects scanned: 138576
Time elapsed: 5 minute(s), 27 second(s)

Memory Processes Infected: 1
Memory Modules Infected: 0
Registry Keys Infected: 1
Registry Values Infected: 2
Folders Infected: 1
Files Infected: 4

Memory Processes Infected:
c:\program files\defensevirus\defensevirus.exe (Rogue.K.DefenseVirus) -> 816 -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\DEFENSEVIRUSMAIN (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DefenseVirusMain (Rogue.K.DefenseVirus) -> Value: DefenseVirusMain -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefenseVirusMain\DisplayName (Rogue.K.DefenseVirus) -> Value: DisplayName -> Quarantined and deleted successfully.

Folders Infected:
c:\documents and settings\{username}\start menu\Programs\defensevirus (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.

Files Infected:
c:\documents and settings\{username}\Desktop\defensevirus_setup.exe (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.
c:\documents and settings\{username}\start menu\Programs\defensevirus\defensevirus.lnk (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.
c:\documents and settings\{username}\start menu\Programs\defensevirus\defensevirus ᦰ�.lnk (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.
c:\program files\defensevirus\defensevirus.exe (Rogue.K.DefenseVirus) -> Quarantined and deleted successfully.


As mentioned before the full version of Malwarebytes' Anti-Malware could have protected your computer against this threat.
We use different ways of protecting your computer(s):
  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention
Save yourself the hassle and get protected.
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