Browse file extensions by file type category:

Dangerous and malicious file icon Dangerous and malicious file type extensions
(131 file extension database entries)

Group of file extensions, which can be dangerous and harmful for your computer, but it may be also a regular program or data files. You should run a virus scan before opening any unknown file type from this group

List of common possibly dangerous files

Dangerous and malicious file extension list

Group of file extensions, which can be dangerous and harmful for your computer, but it may be also a regular program or data files. You should run a virus scan before opening any unknown file type from this group.

Malicious software, also known as malware, is an application or a file, which is harmful to the computer user. Malicious software includes computer viruses, worms, trojan horses, spyware, adware or rootkits.

Computer virus - virus is a program or programming code, which replicates by being copied or initiating its copying to another program, computer boot sector or document. Viruses can be transmitted as attachments to an e-mail note or in a downloaded file, or can be present on a diskette or CD. Some viruses wreak their effect as soon as their code is executed, other lie dormant until circumstances cause their code to be executed by the computer.

Computer worm - worm is a self-replicating virus, which does not alter files, but resides in active memory and duplicates itself. Worms use parts of the operating system that are automatic and usually invisible to the user. It is common for worms to be noticed only after their uncontrolled replication consumes system resources, slowing or halting other tasks.

Trojan horses - trojan horse (also known as trojan), is non-self-replicating malware, which appears to perform a desirable function for the user, while facilitates unauthorized access to the user's computer system.

Spyware - spyware is any technology, which aids in gathering information about a person or organization without their knowledge. Spyware is a program that is installed in someone's computer to secretly gather information about the user and to relay it to advertisers or other interested parties. Spyware can get in the computer as a software virus or as the result of installing a new program.

Adware - adware is any software package, which automatically plays, displays or downloads advertisements to the computer after the software is installed on it or while the application is being used.

Rootkits - rootkit is a collection of programs that enable administrator-level access to a computer or computer network. Typically, a cracker installs a rootkit on a computer after first obtaining user-level access, either by exploiting a known vulnerability or cracking the password. Once the rootkit is installed, it allows the attacker to mask intrusion and gain root or privileged access to the computer and possibly also to other machines in the network.

Sort by: ExtensionSort by: File type description
 file extension .9YoutubeAdBlocke data
386 file icon file extension 386Windows virtual device driver
 file extension aeplTrojan file
 file extension aruAutorun.aru malicious data
atm file icon file extension atmTroj/ProAgent-A
 file extension autMalware AutoStartup file
bat file icon file extension batBatch file (executable)
 file extension bhxBinHex compressed file ASCII archive
 file extension binBinary executable
 file extension bkdBook Library Local Dos exploit data
 file extension blfBeast Trojan File
 file extension bllVBS/European-A worm file
 file extension bmwW32/Liji-A virus file
 file extension booMicrosoft Booasm.arc encoded file archive
 file extension bpsAdwareBlaster file
 file extension bqfBackdoor.Win32.Ciadoor.bqf trojan file
 file extension bukMalicious file
 file extension bupMcAfee quarantined data
 file extension bxzitaup.bxz malware data
 file extension capxmlCapella XML document
 file extension ccTrojan Spymaster.A text file
 file extension ce0Winewar worm file
 file extension ceoWinewar worm file
 file extension cfxxePossibly Malware file
chm file icon file extension chmMicrosoft compiled HTML help module
 file extension cihChernobyl virus data
cla file icon file extension claJava class data
class file icon file extension classJava bytecode class
com file icon file extension comCommand executable
 file extension ctblMalware encrypted file
 file extension cxqSillyDl.CXQ downloading trojan file
 file extension cywRbot.CYW worm file
 file extension dbdDemoShield project file
 file extension delfMalicious or virus file
dev file icon file extension devWindows device driver
 file extension dlbTroj/Dloadr-AHT data
 file extension dliWin32.Sober.AD@mm file
dll file icon file extension dllDynamic Link Library
 file extension dllxBackdoor.Bot data
 file extension domDomPlayer malicious data
drv file icon file extension drvMicrosoft Windows device driver
 file extension dxWin32/Alureon file
 file extension dxzTrojan backdoor virus file
 file extension dyvWORM_AUTORUN.DYV worm data
 file extension dyzBackdoor.Win32.ProRat.dyz trojan file
exe file icon file extension exeProgram executable
 file extension exe1Renamed executable file
 file extension exe_renamedRenamed EXE file
 file extension eztWorm.Win32.AutoRun.ezt file
 file extension fagWin32.AutoRun.fag
 file extension fjlRootkit.Win32.Agent.fjl virus file
 file extension data
 file extension fujWorm.Win32.AutoRun.fuj virus file
 file extension gzquarBitDefender quarantined data
hlp file icon file extension hlpHelp file
 file extension hlwwin32/AMalum.EDHZ file
 file extension hsqQaz Trojan data file
 file extension htsTroj/DelSpy-E file
 file extension ivaDementia.4207 virus file
 file extension iwsTrojan-Downloader.JS.Agent file
jar file icon file extension jarCompressed archive file package for Java classes and data
js file icon file extension jsJavaScript source code script
 file extension kcdrshiphop.kcd malware
 file extension letNuke Randomic Life Generator file
 file extension likTrojan.Win32.Agent.lik data
 file extension lkhWorm.Generic.LKH virus file
 file extension lnkWindows Shortcut
 file extension lokW32/Rbot-WE log file
 file extension lpaq5LPAQ5 compressed archive
 file extension mcqMcAfee quarantined data
 file extension mfuBackdoor.Win32.Agent.mfu data
 file extension mjgTrojan file
 file extension mjzTrojan.Win32.Agent.mjz data
 file extension nlsTroj/Agent-GIS data
 file extension oarHSQLDB database file
ocx file icon file extension ocxActiveX Control
 file extension osaW32/Sober-AD file
 file extension ozdWin32.TrojanDownloader.Agent.OZD trojan
pcx file icon file extension pcxPaintbrush bitmap image
pgm file icon file extension pgmPortable graymap file format
php3 file icon file extension php3PHP version 3 script
 file extension pidW32/Yayin-A worm data file
pif file icon file extension pifMicrosoft Windows program information
 file extension plcLotus add-in functions macros applications
 file extension prW32/Brontok-DP worm file
 file extension qitBackdoor.QIT trojan horse data
 file extension qrnQuarantine file
 file extension rhkBackdoor.Win32.Rbot.rhk data
 file extension rnaMalware file
 file extension rsc_tmpTemporary file
 file extension s7pSubSeven malware
scr file icon file extension scrMicrosoft Windows screensaver
 file extension scrScript
shs file icon file extension shsMicrosoft Windows Shell Scrap Object
 file extension skaHappy99 virus data
 file extension smmAmi Pro macro file
 file extension smtmpTrojan:Win32/FakeSysdef folder
 file extension sopMalware word.sop data
 file extension spamSpam e-mail message
 file extension ssyW32/Sober-AD file
swf file icon file extension swfShockWave Flash, Animated vector format for the Internet
 file extension sysSystem file
 file extension tkoWin32/Oficla malware file
 file extension tpsScam torrent file
 file extension tsajnana.tsa malware
 file extension ttiBeast Trojan data
 file extension txsBeast Trojan data
 file extension upaFake download
 file extension uzyBackdoor.Sokacaps data
vb file icon file extension vbMicrosoft Visual Studio Visual Basic script
vba file icon file extension vbaVisual Basic VBA module
vbe file icon file extension vbeVisual Basic encoded script
vbs file icon file extension vbsVisual Basic script
vbx file icon file extension vbxMicrosoft Visual Basic Extension file
 file extension vexeInfected executable file
vxd file icon file extension vxdMicrosoft Windows virtual device driver
 file extension vzrSinowal.vzr malware file
 file extension wlpginstallPossible Malware data
wmf file icon file extension wmfWindows metafile format
ws file icon file extension wsMicrosoft Windows script
wsc file icon file extension wscMicrosoft Windows scripting component
wsh file icon file extension wshMicrosoft Windows Scripting Host file
 file extension xduBackdoor.Win32.PcClient.xdu data
 file extension xirBackDoor.Generic9.XIR trojan data
xlm file icon file extension xlmMicrosoft Excel macro
xlv file icon file extension xlvMicrosoft Excel VBA module file
 file extension xntW32/Sober-AD file
 file extension xnxxSpyware file
 file extension data
zix file icon file extension zixWinZix compressed archive
 file extension zvzMalware file

Follow us!

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed