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Searched as:
Trojan
Aliases of Trojan (AKA):
[Kaspersky] Trojan.PSW.Atrojan.15, Trojan.PSW.Atrojan.20, Backdoor.Inuk, Backdoor.Notpa, Backdoor.Zemac.b, Backdoor.Zemac.d, Backdoor.Zemac.a, Backdoor.Zemac.c, Backdoor.VB.ga, MutaGen.100.Test.1325, Backdoor.Rat.10, Trojan.Rappere.5718, Backdoor.Rat.20, Backdoor.Win32.RAT.20, Backdoor.Xtcp.200, Backdoor.Xtcp.201, Trojan.307, Stoned.a, Trojan.Zyflex, Trojan.PSW.Sniffor.f, Backdoor.VB.da, Jerusalem.1244.a, ARCV.795.b, Phoenix.Live.1226, Virus101, Virus.DOS.CivilWar.Dad.503, Dutch_Tiny.284, Dutch_Tiny.286, EAF.737, Mini.189, VCL.361.a, V.491, Vienna.583.a, Vienna.634.a, V.699, Mnemonix.559, Singapore.521, V.484.a, V.302, Mutation.241.a, Trivial.26.a, NIK.Test.1958, SillyO.286, Vpp.475, IRC-Worm.Septic.4535, Trojan.PSW.Pricol.a, Trojan-Dropper.Win32.VB.nh, Trojan-Clicker.Win32.Delf.dn, Trojan.Win32.VB.aoe, Trojan.Win32.Delf.cn, Trojan.Win32.Dialer.ru, Trojan.Win32.Dialer.fy, Porn-Dialer.Win32.Agent.h, Trojan.Win32.Dialer.hc, Backdoor.Win32.Agent.alm, Backdoor.Win32.VirtualAve.h, Trojan-Clicker.Win32.BHO.f, AdWare.Win32.BHO.hk
[Eset] Win32/PSW.Atrojan.B trojan, Win32/PSW.Atrojan.C trojan, Win32/PWS.Atrojan.C trojan, Win32/BackDoor.2_0 trojan, Win32/BackDoor.2_02 trojan, Win32/Inuk trojan, Win32/Zemac.D trojan, Win32/Notpa.A trojan, Win32/Notpa trojan, Win32/BackDoor.2_03 trojan, Win32/Zemac.C trojan, Win32/VB.GA trojan, 201 trojan, XTCP.200.Install trojan, _MX trojan, Win32/Optix.Downloader trojan, Jerusalem.1244 virus, probably unknown STEALTH.CRYPT.TSR.COM.EXE virus, Virus101 virus, Ava.550 virus
[McAfee] BackDoor-AR, Generic, Generic BackDoor.b, OC/mut1, BackDoor-U, Froggie, BackDoor-CT, Mailer joke, Zyflex, Generic Downloader.s, AdClicker-EJ, Generic StartPage.f, Dialer-199, Dialer-188, Generic BackDoor.u, FDoS-BEnergy, BackDoor-KT
[F-Prot] security risk or a "backdoor" program, Mgtest.5131, destructive program, W32/XTCP.backdoor.A, virus dropper, W32/Dialer.CEY, W32/Dialer.CMQ, W32/Backdoor.AQGQ
[Panda] Trj/PSW.Atrojan.b, Trj/PSW.Atrojan.C, Backdoor Program.LC, Trj/Backdoor.2_3.Sr, Bck/Zemac, Trj/Backdoor.2_3.Cl, Mutagen.1703, Bck/Rat.1_0, Generic Trojan, Bck/Rat.2_0, Bck/XTCP.201, Tr_Zyflex.35, Trj/PSW.Sniffer.F, Backdoor Program, Bck/VB, Trj/Eraser.Gen, Trj/Headless, Trj/PSW.TestSpy.C, Trj/PSW.TestSpyB, Univ, Univ.OG, Univ.EP, Jerusalem.1244, X-2.Drp, 1226B-Drp, Virus 101, CivilWar.Dad.503, Search.377, Danish_tiny.284.B, K-4C.737, Howard.361, Dest 3, Tu28.535, _612, Pol.583, USSR.711, D-K, V.484, Roseanne, NIK.Test.1958, Univ.EG, Test.1030.?, Vtt.475, Septic.4512.Drp, Trj/PSW.Pricol.a
[Computer Associates] Win32.PSW.Atrojan.15, Win32/Atrojan.B!PWS!Trojan, Win32/PWS.Atrojan.C.Trojan, Win32/PWS.ATrojan.C2.Trojan, Backdoor/Inuk!Server, Backdoor/Zemac.G, Win32.IcqNuke98, Win95/ICQNuke98!Trojan, Win95/ICQNuke98.Trojan, Win32.Zemac, Win95/BackDoor_1.3.Trojan, Backdoor/DarkEclipse!Server, Backdoor/Zemac.A, Win95/ICQNuke.Trojan, Win32.Readme, Win32/Readme.Trojan, Mgtest.5131.B, Backdoor/Rat10, Froggie, Win32.Rat.10, Win32.Rat.20, Win32/Rat.B!Trojan, Backdoor/Xtcp!Server.201, Backdoor/Xtcp.201, Win32.Xtcp.200, Win32.Xtcp.201, StonedDropper.17574.Dropper, Ziflex!Trojan, Zyflex, Sniffer.f!PWS!Trojan, Backdoor/VB.da, TrojanTester!Trojan, Trojan-20990!Trojan, Win32/TestSpy.C!PWS!Trojan, Win32/TestSpy.B!PWS!Trojan, C.112.C, Flow.201, Flow.297, Win32/E.1416, Win32/S.Downloader.Trojan, 1244, X 2, V 101, V 550, 503, V 377, 284/286, 189.C, 361, C.491, 585, 612.A, C.640, V.699, TPE encrypted, 484, V 302, V 1355, C.180, Trivial.26.H
[Other] trojan-dropper-dudu, Win32/Testuu.F, Trojan-IEMax, Win32/Testuu.K, Trojan.IEMax, Win32/Testuu.I, Troojan.IEMax, Win32/Testuu.D, Dialer.ExDialer, Win32/Dialer.E, Win32/Dialer.V, W32/Dialer.LBF, Win32/Dialer.U, Troj/QLowDr-A, Dialer:Win32/Riprova, Plugin, winmovie dialer, Dialer.Sfonditalia, Dialer.Generic, W32/Dialer.AGDZ, Dialer.BGRN, TROJ_AGENT.RTF, W32/Malware, Trojan.W32.VirtualAve, Downloader, TROJ_Generic
How to Remove Trojan from Your Computer
To completely purge Trojan from your computer, you need to delete the files, folders, and Windows registry keys, and registry values associated with Trojan. These files, folders, and registry keys are respectively listed in the Files, Folders, Registry Keys, and Registry Values sections on this page.
For instructions on deleting the Trojan registry keys and registry values, see How to Remove Trojan from the Windows Registry.
For instructions on deleting the Trojan files and folders,
see How to Delete Trojan Files (.exe, .dll, etc.)
How to Delete Trojan Files (.exe, .dll, etc.)
The files and folders associated with Trojan are listed in the Files and Folders sections on this page.
To delete the Trojan files and folders:
- Using your file explorer, browse to each file and folder listed in the Folders and Files sections.Note: The paths use certain conventions such as [%PROGRAM_FILES%]. These conventions are explained here.
- Select the file or folder and press SHIFT+Delete on the keyboard.
- Click Yes in the confirm deletion dialog box.
Files:
[%WINDOWS%]\Temp\sfx00000\PROG\OpenedFilesView.exe
[%WINDOWS%]\Temp\sfx00001\PROG\netpass.exe
[%WINDOWS%]\Temp\sfx00001\PROG\OpenedFilesView.exe
[%SYSTEM_DRIVE%]\$RECYCLE.BIN\S-1-5-21-4164657639-3939115726-3634754318-1000\$RDR6TS5.EXE
[%SYSTEM%]\msvcrtd.exe
[%SYSTEM%]\shell32.exe
[%PROFILE_TEMP%]\Rar$EX00.515\httpfucker\flooder.exe
[%SYSTEM%]\WPA_Kill.exe
[%APPDATA%]\IceCold ReLoaded.exe
[%WINDOWS%]\pw4.exe
[%PROFILE_TEMP%]\ir_ext_temp_0\AutoPlay\Docs\WPA_KILL\WPA_KILL.EXE
[%PROFILE_TEMP%]\IceCold ReLoaded.exe
[%WINDOWS%]\msfiles.exe
[%DESKTOP%]\beast_ trojan\beast207\Beast2.07.exe
[%PROFILE_TEMP%]\ir_ext_temp_0\AutoPlay\Install\HerramientasUSB\Herramientas\USBThief\batexe\OpenedFilesView.exe
[%SYSTEM%]\fileupdate.exe
[%WINDOWS%]\ad.exe
[%APPDATA%]\mIRC\downloads\s6\xh
[%PROFILE_TEMP%]\tt_unadd.inf
[%SYSTEM%]\SWRT01.dll
[%APPDATA%]\Microsoft\Internet Explorer\Quick Launch\Per Adulti.lnk
[%APPDATA%]\Microsoft\Internet Explorer\Quick Launch\Previsioni Meteo.lnk
[%DESKTOP%]\Previsioni Meteo.lnk
[%PROGRAM_FILES%]\Internet Explorer\MUI\yybar.exe
[%PROGRAM_FILES%]\ybar.exe
[%STARTMENU%]\Per Adulti.lnk
[%STARTMENU%]\Previsioni Meteo.lnk
[%SYSTEM%]\antiwpa.dll
[%SYSTEM%]\DayTemp.ini
[%SYSTEM%]\domain11.dll
[%SYSTEM%]\Explor.exe
[%SYSTEM%]\fsutk.dll
[%SYSTEM%]\helperservice.dll
[%SYSTEM%]\intnets.exe
[%SYSTEM%]\lie1d6ff.dll
[%SYSTEM%]\popservice.exe
[%SYSTEM%]\scridows.exe
[%SYSTEM%]\smail11.dll
[%SYSTEM%]\sysinfer.exe
[%SYSTEM%]\systemtoolbar.dll
[%SYSTEM%]\systray32s.exe
[%WINDOWS%]\notpa.exe
[%WINDOWS%]\syssfitb.exe
[%WINDOWS%]\system\august10.exe
[%WINDOWS%]\system\dpvmox.exe
[%WINDOWS%]\system\lie1d6ff.dll
[%WINDOWS%]\system\mshelp32.exe
[%WINDOWS%]\Tempp\8888_16.exe
[%WINDOWS%]\Tempp\winass.exe
[%WINDOWS%]\winass.exe
Folders:
[%PROGRAM_FILES%]\8848
Scan your File System for Trojan
How to Remove Trojan 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 Trojan from your Windows registry, you must delete all the registry keys and values associated with Trojan, which are listed in the Registry Keys and Registry Values sections on this page.
To remove the Trojan registry keys and values:
- On the Windows Start menu, click Run.
- 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. - 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.
- 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_CLASSES_ROOT\interface\{0f2a4adc-dabf-4980-8db4-19f67d7b1f95}
HKEY_CLASSES_ROOT\interface\{96b3b1b9-a510-4603-bd66-2bb2c9f21542}
HKEY_CLASSES_ROOT\nn_bar_dummy.nn_bardummy
HKEY_CLASSES_ROOT\nn_bar_dummy.nn_bardummy.1
HKEY_LOCAL_MACHINE\software\classes\clsid\{8a0dcbda-6e20-489c-9041-c1e8a0352e75}
HKEY_LOCAL_MACHINE\software\classes\clsid\{9a9c9b69-f908-4aab-8d0c-10ea8997f37e}
HKEY_LOCAL_MACHINE\software\classes\interface\{1037b06c-84b7-4240-8d80-485810a0497d}
HKEY_LOCAL_MACHINE\software\classes\interface\{224302b0-94e9-45c2-9e5b-ba989ee556e1}
HKEY_LOCAL_MACHINE\software\classes\interface\{54b287f9-fd90-4457-b65e-cb91560c021d}
HKEY_LOCAL_MACHINE\software\classes\interface\{6e4c7afc-9915-4036-b7f9-8b3f1710788f}
HKEY_LOCAL_MACHINE\software\classes\nn_bar_dummy.nn_bardummy
HKEY_LOCAL_MACHINE\software\classes\nn_bar_dummy.nn_bardummy.1
HKEY_LOCAL_MACHINE\software\classes\typelib\{566dede9-9ed8-45da-9be6-9b2eeab17f49}
HKEY_LOCAL_MACHINE\software\classes\typelib\{f8310e7d-4c4d-46a4-a068-b5bb99411cc7}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\{8a0dcbda-6e20-489c-9041-c1e8a0352e75}
HKEY_CLASSES_ROOT\clsid\{42a3a616-ff3c-4713-a5c2-4f1b566cef51}
HKEY_CLASSES_ROOT\clsid\{43fa5935-e36e-4937-8127-a90191b2ec68}
HKEY_CLASSES_ROOT\clsid\{6b2455fd-3669-4555-8df8-69fd5bc846f8}
HKEY_CLASSES_ROOT\clsid\{72557f9f-13ae-44c9-b3d7-5091b599027c}
HKEY_CLASSES_ROOT\clsid\{749d1d7d-1969-4014-a98d-9e867e7508d0}
HKEY_CLASSES_ROOT\clsid\{81270159-e8f9-4713-9646-03531e0eef58}
HKEY_CLASSES_ROOT\clsid\{86bc8440-8693-4076-a144-6baf942b40b0}
HKEY_CLASSES_ROOT\clsid\{9c759c2b-d5c5-4bdd-adb1-ba4dccc37e5e}
HKEY_CLASSES_ROOT\clsid\{9e1e1371-9d8f-4421-81b9-f8d2e1773a59}
HKEY_CLASSES_ROOT\clsid\{bf50ac63-19da-487e-ad4a-0b452d823b59}
HKEY_CLASSES_ROOT\helperservice.internet_explorer_helper
HKEY_CLASSES_ROOT\interface\{932d8e1b-cd94-4cf1-8ed1-149d452a2033}
HKEY_CLASSES_ROOT\interface\{a55841fa-0e67-4924-974f-75e75f8d4274}
HKEY_CLASSES_ROOT\interface\{c72aeefc-c265-4a10-a5a9-4150b1741580}
HKEY_CLASSES_ROOT\interface\{c86b82be-3e84-4f71-8323-f12bb71d9cb2}
HKEY_CLASSES_ROOT\pagerevisor.regmore
HKEY_CLASSES_ROOT\pagerevisor.regmore.1
HKEY_CLASSES_ROOT\pagerevisor.revisehelper
HKEY_CLASSES_ROOT\pagerevisor.revisehelper.1
HKEY_CLASSES_ROOT\systemtoolbar.internet_explorer
HKEY_CLASSES_ROOT\typelib\{4645a0e0-7b59-439a-bb73-d4159321e09b}
HKEY_CLASSES_ROOT\typelib\{910e102a-5244-4afd-a806-ce9b4e1a96c7}\1.0
HKEY_CLASSES_ROOT\typelib\{c9deef7b-1b15-475f-b4d4-7aa834f0e5c4}
HKEY_CURRENT_USER\software\vb and vba program settings\exploeer
HKEY_LOCAL_MACHINE\software\classes\clsid\{81270159-e8f9-4713-9646-03531e0eef58}
HKEY_LOCAL_MACHINE\software\internet_explorer
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{42a3a616-ff3c-4713-a5c2-4f1b566cef51}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{43fa5935-e36e-4937-8127-a90191b2ec68}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{72557f9f-13ae-44c9-b3d7-5091b599027c}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{9c759c2b-d5c5-4bdd-adb1-ba4dccc37e5e}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{9e1e1371-9d8f-4421-81b9-f8d2e1773a59}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\{bf50ac63-19da-487e-ad4a-0b452d823b59}
Registry Values:
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29697639
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29704813
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=30159930
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29708739
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29732011
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29788144
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=30038006
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29751925
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29721753
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29788799
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar, {9A9C9B68-F908-4AAB-8D0C-10EA8997F37E}=0
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29706236
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29788334
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=29805268
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\contextsidebar, displayname=Context Display
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\mirrorunder, displayname=Alt Win
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\ronsidebar, displayname=RON Display
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\spidersidebar, displayname=Search Aid
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\uninstall\urlsidebar, displayname=URL Display
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\msupdate, imagepath=[%SYSTEM%]\msvcrtd.exe
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\internet settings\zonemap\domains\defaultbar.com\www, *=2=
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\internet settings\zonemap\domains\ragazze-spiate.com\www, *=2=
HKEY_CURRENT_USER\software\microsoft\windows\currentversion\internet settings\zonemap\domains\super-contenuti.com\www, *=2=
HKEY_LOCAL_MACHINE\microsoft\windows nt\currentversion\winlogon\notify, antiwpa=
HKEY_LOCAL_MACHINE\software\microsoft\active setup\installed components\{18a20280-fe1d-6789-0106-010106050103}, stubpath=[%SYSTEM%]\explor.exe=
HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar, {6b2455fd-3669-4555-8df8-69fd5bc846f8}=
HKEY_LOCAL_MACHINE\software\microsoft\internet explorer\toolbar, {81270159-e8f9-4713-9646-03531e0eef58}=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\internet settings\user agent\post platform, sgrunt|v109|2026|s409122656|dialno=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run, intnets=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run, sysinfer=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run, system-time update=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\ttunim, ttunim=
Scan your Windows Registry for Trojan
Trojan Categorized as:
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.
Adware
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.
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.
Backdoor
Of all trojans, backdoor trojans pose the greatest danger to users’ PCs because they give their authors remote control over infected computers. They are downloaded, installed, and run silently, without the user’s consent or knowledge. Upon installation, backdoor trojans can be instructed to send, receive, execute and delete files, gather and transfer confidential data from the computer, log all activity on the computer, and perform other harmful activities.
RAT
Remote Access Tool. A program that enables a hacker to remotely access and control other people’s computers. A RAT can serve a variety of malicious purposes, including hijacking and transferring private information, downloading files, running programs, and tampering with system settings.
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.
Toolbar
A third-party toolbar that provides additional functionality or enhancements for a user’s browser.
Some toolbars are useful; others may camouflage installation of a trojan or spyware to a user’s computer or act as adware bombarding a user with pop-up advertisements.
Downloader
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.
Hacker Tool
Hacker tools are utilities designed to help hackers gain control of remote computers in order to use them as zombies (in DoS attacks, for example), download other malicious programs into those computers, or use them for other malicious purposes.
DoS
A DoS (Denial of Service) attack is designed to disrupt or stop the normal running of a Web site, server, or other network resource. Hackers or malware writers resort to various ways to achieve this. A DoS attack can commonly result in a server being flooded with more network traffic than it is capable of processing. This hinders or prevents the server’s normal operation and sometimes causes its complete failure.
Unlike a DoS attack, a DDoS attack employs multiple PCs. The hacker or malware writer normally uses one infected computer - “master” - to centrally coordinate the attack across other, so-called “zombie”, computers. Typically, the malware writer gains control of both master and zombie computers by exploiting a weakness in an application or the operating system on those computers, in order to install a trojan or other malicious code.
Tracking Cookie
Normally, cookies, which are small text files that certain Web sites leave on computers to store information identifying users and customize Web site content for them (such as the user’s Web site settings and preferences, a list of visited pages, computer details, and shopping card information), are harmless. However, some cookies may be used to track and transmit browsing preferences or other private information to online marketers and spammers.
How Did My PC Get Infected with Trojan?
The following are the most likely reasons why your computer got infected with Trojan:
- Your operating system and Web browser's security settings are too lax.
- You are not following safe Internet surfing and PC practices.
Downloading and Installing Freeware or Shareware
Small-charge or free software applications may come bundled with spyware, adware, or programs like Trojan. 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 Trojan.
Visiting Questionable Web Sites
When you visit sites with dubious or objectionable content, trojans-including Trojan-, spyware, and adware, may well be automatically downloaded and installed onto your computer.
Detecting Trojan
The following symptoms signal that your computer is very likely to be infected with Trojan.
PC is working very slowly
Trojan 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 Trojan.
New desktop shortcuts have appeared or the home page has changed
Trojan can tamper with your Internet settings or redirect your default home page to unwanted web sites. Trojan may even add new shortcuts to your PC desktop.
Annoying popups keep appearing on your PC
Trojan may swamp your computer with pestering popup ads, even when you're not connected to the Internet, while secretly tracking your browsing habits and gathering your personal information.
E-mails that you didn't write are being sent from your mailbox
Trojan may gain complete control of your mailbox to generate and send e-mail with virus attachments, e-mail hoaxes, spam, and other types of unsolicited e-mail to other people.
Check now if your PC is infected with Trojan
Also Be Aware of the Following Threats:
Downloader
Hacker Tool
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