### malpedia

Known threats:699,742 Last Update:November 20, 22:46

I consider myself pretty good with a computer, but after 10 hours of trying to do this myself, the sysguard.exe whipped me. I couldn't find all the files and when I thought I had them all, they would replicate and play hide and go seek I have never endorsed a product in a comment, but if you want to rid yourself of this stuff, pay the $24.99 and download Exterminate-It It fixed my system in 5 minutes!  Mike T. # IstBar ## Aliases of IstBar (AKA):  [Kaspersky] TrojanDownloader.Win32.IstBar.e, TrojanDownloader.Win32.IstBar.p, TrojanDownloader.Win32.IstBar.t, Trojan-Downloader.Win32.IstBar.gen, Trojan-Downloader.JS.IstBar.ai, Trojan-Downloader.Win32.Small.gl, Trojan-Downlaoder.Win32.IstBar.gen, Trojan-Downloader.Win32.IstBar.pb, Trojan-Downloader.Win32.IstBar.gz [McAfee] Adware-ISTbar.dldr [Panda] Adware/nCase, Spyware/ISTbar, Trj/W32.IST, Trojan Horse [CA] Win32/IstBar.ce!Downloader, Win32/PMagic.A!Trojan, Win32/IstBar.i!Downloader [Other] Win32/Istbar.Y, Adware.Istbar, Win32/ISTbar.BX, Win32/Istbar.CV, Troj/Small-GL, Win32/Istbar.CX, Adware.YourSiteBar ## How to Remove IstBar from Your Computer^ To completely purge IstBar from your computer, you need to delete the files, folders, Windows registry keys and registry values associated with IstBar. These files, folders and registry elements are respectively listed in the Files, Folders, Registry Keys and Registry Values sections on this page. For instructions on deleting the IstBar registry keys and registry values, see How to Remove IstBar from the Windows Registry. For instructions on deleting the IstBar files and folders, see How to Delete IstBar Files (.exe, .dll, etc.) ## How to Delete IstBar Files (.exe, .dll, etc.)^ The files and folders associated with IstBar are listed in the Files and Folders sections on this page. To delete the IstBar files and folders: 1. Using your file explorer, browse to each file and folder listed in the Folders and Files sections. 2. Note: The paths use certain special folders (conventions) such as [%PROGRAM_FILES%]. Please note that these conventions are depending on Windows Version / Language. These conventions are explained here. 3. Select the file or folder and press SHIFT+Delete on the keyboard. 4. Click Yes in the confirm deletion dialog box. 5. IMPORTANT: If a file is locked (in use by some application), its deletion will fail (the Windows will display a corresponding message).You can delete such locked files with the RemoveOnReboot utility. To delete a locked file, right-click on the file, select Send To->Remove on Next Reboot on the menu and restart your computer. You can install the RemoveOnReboot utility from here. [%PROGRAM_FILES_COMMON%]\totem shared [%PROGRAM_FILES%]\istsvc [%PROGRAM_FILES%]\search bar [%PROGRAM_FILES%]\free amature movie ## How to Remove IstBar from the Windows Registry^ The Windows registry stores important system information such as system preferences, user settings and installed programs details as well as the information about the applications that are automatically run at start-up. Because of this, spyware, malware and adware often store references to their own files in your Windows registry so that they can automatically launch every time you start up your computer. To effectively remove IstBar from your Windows registry, you must delete all the registry keys and values associated with IstBar, which are listed in the Registry Keys and Registry Values sections on this page. IMPORTANT: Because the registry is a core component of your Windows system, it is strongly recommended that you back up the registry before you begin deleting keys and values. For information about backing up the Windows registry, refer to the Registry Editor online help. To remove the IstBar registry keys and values: 1. On the Windows Start menu, click Run. 2. In the Open box, type regedit and click OK. The Registry Editor window opens. This window consists of two panes. The left pane displays folders that represent the registry keys arranged in hierarchical order. The right one lists the registry values of the currently selected registry key. 3. To delete each registry key listed in the Registry Keys section, do the following: • Locate the key in the left pane of the Registry Editor window by sequentially expanding the folders according to the path indicated in the Registry Keys section. For example, if the path of a registry key is HKEY_LOCAL_MACHINE\software\FolderA\FolderB\KeyName1 sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA and FolderB folders. • Select the key name indicated at the end of the path (KeyName1 in the example above). • Right-click the key name and select Delete on the menu. • Click Yes in the Confirm Key Delete dialog box. 4. To delete each registry value listed in the Registry Values section, do the following: • Display the value in the right pane of the Registry Editor window by sequentially expanding the folders in the left pane according to the path indicated in the Registry Values section and selecting the specified key name. For example, if the path of a registry value is HKEY_LOCAL_MACHINE\software\FolderA\FolderB\KeyName2,valueC= sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA and FolderB folders and select the KeyName2 key to display the valueC value in the right pane. • In the right pane, select the value name indicated after a comma at the end of the path (valueC in the example above). • Right-click the value name and select Delete on the menu. • Click Yes in the Confirm Value Delete dialog box. Registry Keys HKEY_LOCAL_MACHINE\software\classes\clsid\{f3e7ff6d-dca1-11d4-95df-00c0dfe9982c} HKEY_LOCAL_MACHINE\software\classes\typelib\{f3e7ff6b-dca1-11d4-95df-00c0dfe9982c} HKEY_CLASSES_ROOT\pugi.pugiobj HKEY_CLASSES_ROOT\pugi.pugiobj.1 HKEY_CLASSES_ROOT\interface\{bf06da8e-2beb-4816-9bbd-f7625246e245} HKEY_CLASSES_ROOT\typelib\{db447818-96b4-40df-8a55-720da496f514} HKEY_CURRENT_USER\software\ist HKEY_LOCAL_MACHINE\software\classes\typelib\{17ed04b9-6c71-11d4-87a3-daa6b6b40e8f} HKEY_CLASSES_ROOT\interface\{dc065fa6-08f9-4c50-99dc-275d16cfc5bd} HKEY_LOCAL_MACHINE\software\microsoft\code store database\distribution units\{12398dd6-40aa-4c40-a4ec-a42cfc0de797} HKEY_CLASSES_ROOT\interface\{0e704ba4-c517-4be7-a1cd-c3ffda1e1ffe} HKEY_CLASSES_ROOT\Interface\{0985C112-2562-46F2-8DA6-92648BA4630F} HKEY_CLASSES_ROOT\appid\loaderx.exe HKEY_CLASSES_ROOT\interface\{9388907f-82f5-434d-a941-bb802c6dd7c1} HKEY_CLASSES_ROOT\typelib\{8c752c5e-3c10-4076-af0a-ffc69fa20d1b} HKEY_CLASSES_ROOT\istactivex.installer.1 HKEY_LOCAL_MACHINE\software\classes\interface\{d128e6c8-6ae7-4ecd-939e-e2e6ca7d035d} HKEY_LOCAL_MACHINE\software\classes\typelib\{308a04d3-084d-43aa-a3e6-0d12bcca3ce6} HKEY_CLASSES_ROOT\clsid\{42f2c9ba-614f-47c0-b3e3-ecfd34eed658} HKEY_CLASSES_ROOT\typelib\{67907b3c-a6ef-4a01-99ad-3fcd5f526429} HKEY_LOCAL_MACHINE\software\classes\imgconv.clsimgconv HKEY_LOCAL_MACHINE\software\classes\interface\{2ddd90d6-f153-4ea7-a324-4b2d83d1027e} HKEY_LOCAL_MACHINE\software\classes\interface\{9ce15eb5-6b39-4656-9e1f-2d219ee42e0e} HKEY_LOCAL_MACHINE\software\classes\typelib\{7c9e9a74-1922-409e-ab46-e48784336c3a} HKEY_LOCAL_MACHINE\software\classes\clsid\{98a8315e-667a-11d5-87a3-bb213c32b44b} HKEY_LOCAL_MACHINE\software\classes\interface\{79bf9dcd-c52d-4da8-b15e-ac2a88e96b0a} HKEY_LOCAL_MACHINE\software\classes\interface\{98a8315d-667a-11d5-87a3-bb213c32b44b} HKEY_LOCAL_MACHINE\software\classes\interface\{98a8315f-667a-11d5-87a3-bb213c32b44b} HKEY_LOCAL_MACHINE\software\classes\interface\{996b33c1-8e19-4f4f-ab6c-52a2c523b7d3} HKEY_CLASSES_ROOT\interface\{90ce74cc-788a-4a00-b38d-cbca08cc9e8f} HKEY_CLASSES_ROOT\typelib\{cc257918-f435-4a33-8231-2b8195990cca} HKEY_CLASSES_ROOT\clsid\{dc341f1b-ec77-47be-8f58-96e83861cc5a} HKEY_CLASSES_ROOT\testcontentmatchcontrol1.contentmatchtag HKEY_CLASSES_ROOT\testcontentmatchcontrol1.contentmatchtag.1 HKEY_LOCAL_MACHINE\software\istbar HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\istbar HKEY_LOCAL_MACHINE\software\microsoft\code store database\distribution units\{7c559105-9ecf-42b8-b3f7-832e75edd959} HKEY_LOCAL_MACHINE\software\classes\clsid\{aa8c93e1-7e5f-497e-b67c-cc8fe2a40d3b} HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\istbaristbar HKEY_CURRENT_USER\software\istbar HKEY_LOCAL_MACHINE\software\istsvc HKEY_LOCAL_MACHINE\software\microsoft\code store database\distribution units\{018b7ec3-eeca-11d3-8e71-0000e82c6c0d} HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/istactivex.dll HKEY_CLASSES_ROOT\istactivex.installer.2 HKEY_LOCAL_MACHINE\software\classes\istactivex.installer.2 HKEY_CLASSES_ROOT\istactivex.installer HKEY_LOCAL_MACHINE\software\classes\istactivex.installer HKEY_LOCAL_MACHINE\software\classes\clsid\{12398dd6-40aa-4c40-a4ec-a42cfc0de797} HKEY_CLASSES_ROOT\clsid\{12398dd6-40aa-4c40-a4ec-a42cfc0de797} HKEY_CURRENT_USER\software\iesearchbar HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\iesearchbariesearchbar HKEY_CLASSES_ROOT\CLSID\{7C559105-9ECF-42b8-B3F7-832E75EDD959} HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\istsvc HKEY_CLASSES_ROOT\typelib\{89a10d64-83bf-41a4-86a3-7aaf1f8f3d1b} HKEY_CLASSES_ROOT\clsid\{771a1334-6b08-4a6b-aedc-cf994ba2cebe} HKEY_CLASSES_ROOT\typelib\{e9a5b71c-093b-4f34-af07-34fca89ba0df} HKEY_CLASSES_ROOT\TypeLib\{67907B3C-A6EF-4A01-99AD-3FCD5F526429} HKEY_CLASSES_ROOT\Interface\{0985C112-2562-46F2-8DA6-92648BA4630F} HKEY_CLASSES_ROOT\clsid\{ef86873f-04c2-4a95-a373-5703c08efc7b} HKEY_CLASSES_ROOT\istbar.barobj HKEY_CLASSES_ROOT\istx.installer.2 HKEY_CLASSES_ROOT\typelib\{8c752c5e-3c10-4076-af0a-ffc69fa20d1c} HKEY_CLASSES_ROOT\ysbactivex.installer HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\internet settings\zonemap\domains\contentmatch.net HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\moduleusage\[%WINDOWS%]\downloaded program files\istactivex.dll HKEY_CLASSES_ROOT\clsid\{6fd5192-a97c-4b48-a5d7-2420cfdcfdf2} HKEY_CLASSES_ROOT\clsid\{faa356e4-d317-42a6-ab41-a3021c6e7d52} HKEY_CLASSES_ROOT\istx.installer HKEY_CLASSES_ROOT\typelib\{6fd5192-a97c-4b48-a5d7-2420cfdcfdf2} HKEY_CLASSES_ROOT\typelib\{8d038f3d-7a31-42fa-8233-edf3ddd9fc25} HKEY_CURRENT_USER\software\1stbar HKEY_CURRENT_USER\software\ist_exe_start HKEY_LOCAL_MACHINE\software\microsoft\currentversion\explorer\browser helper objects\{a3fdd654-a057-4971-9844-4ed8e67dbbb8} HKEY_CLASSES_ROOT\Interface\{0985C112-2562-46F2-8DA6-92648BA4630F} HKEY_CLASSES_ROOT\clsid\{7c559105-9ecf-42b8-b3f7-832e75edd959} Registry Values [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\shareddlls][%WINDOWS%]\downloaded program files\istactivex.dll=1 [HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser]{5f1abcdb-a875-46c1-8345-b72a4567e486}=DBBC1A5F75A8C1468345B72A4567E486 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update]displayname=WSEM Update [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update]uninstallstring="[%PROGRAM_FILES%]\Internet Optimizer\optimize.exe" /u 1 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion]mediaswitch=0 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=1093821242 [HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar]{faa356e4-d317-42a6-ab41-a3021c6e7d52}=(EMPTY) [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RUN]IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run]ist service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=0 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunAdvanced Uninstaller]IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run]ist service=[%PROGRAM_FILES%]\ISTsvc\ [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=1106638456 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run-]IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=1091214252 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=1080354324 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer]shstyle=1094680799 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, rlI85Ñ”Ð“d+ÑŠ]]Ð„Â»o8ÐŒÑŒÑ›Ñ…[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\stmhm.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]rlI8v20Ñ”Ð“d+ÑŠÂ»o8ÐŒÑŒÑ›Ñ…g[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\stmhm.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, rlI8v20Ñ”Ð“d+ÑŠ]]Ð„Â»o8ÐŒÑŒ[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\stmhm.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]Windows update=[%SYSTEM%]\wudupdate.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run-]IST Service=\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunBackup]IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunX]IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] {5f1abcdb-a875-46c1-8345-b72a4567e486}=1 [HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] {5f1abcdb-a875-46c1-8345-b72a4567e486}=[%HEX_ARRAY%] [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion] mediaswitch=0 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=0 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=1096264928 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=1098145370 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=1104202348 [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=1109241851 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\shell extensions\approved] {0a8ce102-fa03-4612-9bee-7fe5452f4cb1}=Search Bar [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update] displayname=WSEM Update [HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update] uninstallstring=[%PROGRAM_FILES%]\Internet Optimizer\optimize.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %A2%AA%B8%EF0/4%BB%0E%17}%A5 %E3x%87%1F5%18_[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\jkpmt.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B2#%0C%A0L"h'%FE9%D3%9C%F03r%C5%17W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\vuidys.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0F"h'%FE9%D3%9C%FA3r%C5%1DW[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\tuihgmn.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0G"h'%FE9%D3%9C%FB3r%C5%1CW[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\tuihgmn.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0K"h'%FE9%D3%9C%F73r%C5%10W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\oyiamg.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0K"h'%FE9%D3%9C%F73r%C5%10W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\skwwde.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0K"h'%FE9%D3%9C%F73r%C5%10W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\tgevq.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0K"h'%FE9%D3%9C%F73r%C5%10W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\uhyfdnry.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0L"h'%FE9%D3%9C%F03r%C5%17W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\npuoxk.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0L"h'%FE9%D3%9C%F03r%C5%17W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\rbjpuhp.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0L"h'%FE9%D3%9C%F03r%C5%17W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\sbxlti.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0L"h'%FE9%D3%9C%F03r%C5%17W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\tuihgmn.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] %C1%14%B3#%0C%A0{"h'%FE9%D3%9C%C73r%C5 W[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\npuoxk.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] <%B0%87%0E@%A1%B1%A7Tl%E7%FF[%CC%85*%13%E8g%CB[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\suoqoxl.exe [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] <%B0%87%0E@V%F7h$v%12%F9%F5%9A/%82%B2%91%C6%02[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\suoqoxl.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] <%B0%DCZA%DDYM%D6lY%ABZ%B0a%C6+%C0%BC%12[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\kjsyjgjo.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] <%B0%DCZA%DDYM%D6lY%ABZ%B0a%FC%9E%F5gM[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\kjsyjgjo.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] Aciv%12%F9%F5%9A/%82%B2%91%C6%02%DFf%CFNb%89[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\lrihhxvv.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] dCJyDccm%FA*%13%C0a%EE%9Ea%EE%9Eaa[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\lsqay.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] Dqcbubcv%17%C5%F5%F6/%A8G%%)%10%DFf[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=(EMPTY)
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] EuTc8%CF%D4@%D4%C1%DF]%A7%FA"%11%FC%89%FC%9E[%PROGRAM_FILES%]\ISTsvc\istsvc.exe=[%WINDOWS%]\vyaojdl.exe
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run-] IST Service=[%PROGRAM_FILES%]\ISTsvc\istsvc.exe
[HKEY_CURRENT_USER\software\microsoft\internet explorer\extensions\cmdmapping] 10e42047-deb9-4535-a118-b3f6ec39b807=(EMPTY)
[HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] faa356e4-d317-42a6-ab41-a3021c6e7d52=(EMPTY)
[HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] {5d60ff48-95be-4956-b4c6-6bb168a70310}=(EMPTY)
[HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] {5f1abcdb-a875-46c1-8345-b72a4567e486}=DBBC1A5F75A8C1468345B72A4567E486
[HKEY_CURRENT_USER\software\microsoft\internet explorer\toolbar\webbrowser] {5f1abcdb-a875-46c1-8345-b72a4567e486}=(EMPTY)
[HKEY_LOCAL_MACHINE\hardware\resourcemap\pnp manager\pnpmanager] device\resource008659.raw=(EMPTY)
[HKEY_LOCAL_MACHINE\hardware\resourcemap\pnp manager\pnpmanager] device\resource008659.translated=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar] {0a8ce102-fa03-4612-9bee-7fe5452f4cb1}=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar] {faa356e4-d317-42a6-ab41-a3021c6e7d52}=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion] mediaswitch=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer] shstyle=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] 5fuekkr=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] cfuf=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] ist service=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] oronif=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run] w7cuu=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\shell extensions\approved] {0a8ce102-fa03-4612-9bee-7fe5452f4cb1}=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\70tovmto]displayname=shopathomeselect cash back
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\70tovmto]uninstallstring=[%WINDOWS%]\70tovmto.exe
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update] displayname=(EMPTY)
[HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\wsem update] uninstallstring=(EMPTY)

### Trojan

A trojan is a program that is disguised as legitimate software but is designed to carry out some harmful actions on the infected computer.

Unlike viruses and worms, trojans don’t replicate but they can be just as destructive.

These days trojans are very common. Trojans are divided into a number different categories based on their function or type of damage.

Be Aware of the Following Trojan Threats:

Software that is designed to launch advertisements, frequently pop-up ads, on a user’s computer and/or to redirect search results to promotional Web sites. Adware programs are often built into freeware or shareware programs, where the adware creates an indirect ‘charge’ for using the free program. Sometimes a trojan can silently download an adware program from a Web site and install it onto a user’s machine.

Hacker tools, or Browser Hijackers, can also download an adware program by exploiting a web browser’s vulnerability. Browser Hijackers may tamper with the browser settings, redirect incorrect or incomplete URLs to unwanted Web sites, or change the default home page. They can also re-direct a user’s searches to “pay-to-view” (often pornographic) Web sites.

Typically, many adware programs do not leave any marks of their presence in the system: they are not listed on Start | Programs; they add no icons to the system tray; and they don’t show up on the task list. In addition, adware programs seldom provide an uninstallation procedure, and attempts at manually removing them frequently result in failure of the original carrier program.

Be Aware of the Following Adware Threats:

### BHO

Browser Helper Object, or BHO, is a dynamic link library (DLL) that runs whenever Internet Explorer is started. Generally, BHOs are included in installation of third-party programs where they are offered as enhancements of the browser functionality. For example, many Internet Explorer plug-ins are in essence BHOs.

BHOs can be installed silently or “legitimately” when a user fails to read the fine print included in the freeware program’s EULA (End User License Agreement).

Because BHOs are small programs, they can do anything that other programs can do. It’s not easy to detect the BHOs installed on the computer. This enables hackers and other malevolent users to employ the BHO functionality in their interests, for example, secretly install adware programs or gather various statistics on the user’s browsing trends.

Be Aware of the Following BHO Threats:

### Hijacker

Software that seizes control of a computer’s resources to proliferate itself or use them for other malicious purposes.

There are several types of hijackers. The most common are:

• Browser hijackers – Alters the existing Internet browser settings so that a user is redirected to unwanted or malicious Web sites. These include programs that change the browser Home page or replace a popular search service’s home page with its own fake copy, whose search results point to particular malicious or irrelevant sites.
• Autorun hijackers – Automatically run certain programs on start-up of a user’s computer.

Be Aware of the Following Hijacker Threats:

A type of trojan. The primary purpose of downloaders is to install malicious code on a user’s computer. However, they can enable other malicious uses. For example, they can be used to continually download new versions of malicious code, adware, or “pornware.” They are also used frequently used to exploit the vulnerabilities of Internet Explorer.

Downloaders are typically written in script languages such as VBS or JavaScript.

## How Did My PC Get Infected with IstBar?^

The following are the most likely reasons why your computer got infected with IstBar:

• Your operating system and Web browser's security settings are too lax.
• You are not following safe Internet surfing and PC practices.

Small-charge or free software applications may come bundled with spyware, adware, or programs like IstBar. Sometimes adware is attached to free software to enable the developers to cover the overhead involved in created the software. Spyware frequently piggybacks on free software into your computer to damage it and steal valuable private information.

### Using Peer-to-Peer Software

The use of peer-to-peer (P2P) programs or other applications using a shared network exposes your system to the risk of unwittingly downloading infected files, including malicious programs like IstBar.

### Visiting Questionable Web Sites

When you visit sites with dubious or objectionable content, trojans-including IstBar, spyware and adware, may well be automatically downloaded and installed onto your computer.

## Detecting IstBar^

The following symptoms signal that your computer is very likely to be infected with IstBar:

### PC is working very slowly

IstBar can seriously slow down your computer. If your PC takes a lot longer than normal to restart or your Internet connection is extremely slow, your computer may well be infected with IstBar.