Browse file extensions by file type category:
Dangerous and malicious file type extensions
(134 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
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: Extension | Sort by: File type description |
file extension ocx | ActiveX Control |
file extension bps | AdwareBlaster data |
file extension smm | Ami Pro macro |
file extension aru | Autorun.aru malicious data |
file extension dllx | Backdoor.Bot data |
file extension xir | BackDoor.Generic9.XIR trojan data |
file extension qit | Backdoor.QIT trojan horse data |
file extension uzy | Backdoor.Sokacaps data |
file extension mfu | Backdoor.Win32.Agent.mfu data |
file extension bqf | Backdoor.Win32.Ciadoor.bqf trojan |
file extension xdu | Backdoor.Win32.PcClient.xdu data |
file extension dyz | Backdoor.Win32.ProRat.dyz trojan file |
file extension rhk | Backdoor.Win32.Rbot.rhk data |
file extension bxz | Balabolka text document (compressed) |
file extension bat | Batch file (executable) |
file extension blf | Beast Trojan data |
file extension tti | Beast Trojan data |
file extension txs | Beast Trojan data |
file extension bin | Binary executable |
file extension bhx | BinHex compressed file ASCII archive |
file extension gzquar | BitDefender quarantined data file |
file extension bkd | Book Library Local Dos exploit data |
file extension capxml | Capella XML document |
file extension cih | Chernobyl virus data |
file extension nh | Chinese Academic Journals Online full-text database |
file extension com | Command executable |
file extension jar | Compressed archive file package for Java classes and data |
file extension 0_full_0_tgod_signed | CrossFire_OBV4.8.3.0_Full_0_tgod_signed.exe |
file extension iva | Dementia.4207 virus data |
file extension dbd | DemoShield project |
file extension xtbl | [email protected] data |
file extension dom | DomPlayer malicious data |
file extension dll | Dynamic Link Library |
file extension upa | Fake download |
file extension ska | Happy99 virus data |
file extension hlp | Help file |
file extension oar | HSQLDB database |
file extension vexe | Infected executable |
file extension bxz | itaup.bxz malware data |
file extension class | Java bytecode class |
file extension cla | Java class data |
file extension js | JavaScript source code script |
file extension tsa | jnana.tsa malware |
file extension plc | Lotus add-in functions macros applications |
file extension lpaq5 | LPAQ5 compressed archive |
file extension buk | Malicious data |
file extension delf | Malicious or virus data |
file extension aut | Malware AutoStartup data |
file extension rna | Malware data |
file extension zvz | Malware data |
file extension ctbl | Malware encrypted data |
file extension sop | Malware word.sop data |
file extension bup | McAfee quarantined data |
file extension mcq | McAfee quarantined data |
file extension boo | Microsoft Booasm.arc encoded file archive |
file extension chm | Microsoft compiled HTML help module |
file extension xlm | Microsoft Excel macro |
file extension xlv | Microsoft Excel VBA module |
file extension vbx | Microsoft Visual Basic Extension |
file extension vb | Microsoft Visual Studio Visual Basic script |
file extension drv | Microsoft Windows device driver |
file extension pif | Microsoft Windows program information |
file extension ws | Microsoft Windows script |
file extension wsc | Microsoft Windows scripting component |
file extension wsh | Microsoft Windows Scripting Host data |
file extension shs | Microsoft Windows Shell Scrap Object |
file extension vxd | Microsoft Windows virtual device driver |
file extension scr | MS Windows screensaver |
file extension let | Nuke Randomic Life Generator data |
file extension pcx | Paintbrush bitmap image |
file extension pgm | Portable graymap file format |
file extension wlpginstall | Possible Malware data |
file extension cfxxe | Possibly Malware file |
file extension exe | Program executable |
file extension hsq | Qaz Trojan data |
file extension qrn | Quarantine data |
file extension cyw | Rbot.CYW worm data |
file extension exe_renamed | Renamed EXE file |
file extension exe1 | Renamed executable |
file extension fjl | Rootkit.Win32.Agent.fjl virus data |
file extension kcd | rshiphop.kcd malware |
file extension tps | Scam torrent file |
file extension scr | Script |
file extension swf | ShockWave Flash, Animated vector format for the Internet |
file extension cxq | SillyDl.CXQ downloading trojan data |
file extension vzr | Sinowal.vzr malware data |
file extension spam | Spam e-mail message |
file extension xnxx | Spyware file |
file extension s7p | SubSeven malware |
file extension sys | System file |
file extension rsc_tmp | Temporary data |
file extension nls | Troj/Agent-GIS data |
file extension hts | Troj/DelSpy-E data |
file extension dlb | Troj/Dloadr-AHT data |
file extension atm | Troj/ProAgent-A data |
file extension dxz | Trojan backdoor virus data |
file extension aepl | Trojan data |
file extension mjg | Trojan data |
file extension cc | Trojan Spymaster.A text document |
file extension iws | Trojan-Downloader.JS.Agent data |
file extension fnr | Trojan-Dropper.Win32.Flystud.lc. data |
file extension lik | Trojan.Win32.Agent.lik data |
file extension mjz | Trojan.Win32.Agent.mjz data |
file extension smtmp | Trojan:Win32/FakeSysdef folder |
file extension crypt1 | UltraCrypter ransomware encrypted file |
file extension bll | VBS/European-A worm file |
file extension vbe | Visual Basic encoded script |
file extension vbs | Visual Basic script |
file extension vba | Visual Basic VBA module |
file extension pr | W32/Brontok-DP worm file |
file extension bmw | W32/Liji-A virus data |
file extension lok | W32/Rbot-WE log file |
file extension osa | W32/Sober-AD data |
file extension xnt | W32/Sober-AD data |
file extension ssy | W32/Sober-AD file |
file extension pid | W32/Yayin-A worm data |
file extension fag | Win32.AutoRun.fag |
file extension dli | Win32.Sober.AD@mm file |
file extension ozd | Win32.TrojanDownloader.Agent.OZD trojan |
file extension dx | Win32/Alureon data |
file extension hlw | win32/AMalum.EDHZ data |
file extension tko | Win32/Oficla malware data |
file extension dev | Windows device driver |
file extension wmf | Windows Metafile Format |
file extension lnk | Windows Shortcut |
file extension 386 | Windows virtual device driver |
file extension ceo | Winewar worm data |
file extension ce0 | Winewar worm data |
file extension zix | WinZix compressed archive |
file extension lkh | Worm.Generic.LKH virus data |
file extension ezt | Worm.Win32.AutoRun.ezt data |
file extension fuj | Worm.Win32.AutoRun.fuj virus data |
file extension dyv | WORM_AUTORUN.DYV worm data |
file extension .9 | YoutubeAdBlocke data |