F-Secure Malware Descriptions

Trojan:W32/Trojan
A trojan, or trojan horse, is a seemingly legitimate program which secretly performs other, usually malicious, functions. It is usually user-initiated and does not replicate.

Backdoor:W32/Backdoor
A remote administration utility that bypasses normal security mechanisms to secretly control a program, computer or network.

Virus:W97M/Argh
A program that secretly and maliciously integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Virus:W97M/Walker
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Other:W32/W97M
A program that does not fall into any other category.

Other:W32/Hidden_items
The file appears to be suspicious, is potentially undesirable, or may be structured in a way or has characteristics that resembles known malware. This may indicate the presence of a malware infection, or that the suspect file is malicious.

Trojan:W32/Generic
A trojan, or trojan horse, is a seemingly legitimate program which secretly performs other, usually malicious, functions. It is usually user-initiated and does not replicate.

Adware:W32/Apropos
This program delivers advertising content to the user. It is usually annoying but harmless, unless it is combined with spyware or trackware.

Worm:W32/MTX
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Email-Worm:W32/Email-Worm
This type of worm is embedded in an e-mail attachment, and spreads using the infected computer's e-mailing networks.

Rogue:W32/WinFixer.gen!A
The file appears to be suspicious, is potentially undesirable, or may be structured in a way or has characteristics that resembles known malware. This may indicate the presence of a malware infection, or that the suspect file is malicious.

Trojan-Downloader:W32/WinFixer
This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Trojan-Dropper:W32/Agent.DKIT
A trojan that contains one or more malicious programs, which it will secretly install and execute.

Virus:X97M/Laroux
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Virus:W32/Concept
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Email-Worm:W32/Sober.T
A worm that spreads via e-mail, usually in infected executable e-mail file attachments.

Worm:W32/NetSky.B
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Worm:W32/NetSky.V
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Virus:W32/HLLO
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Virus:W32/Duts.1520
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Worm:W32/Gurong.A
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Trojan-Spy:W32/Montp
A trojan that secretly installs spy programs, such as keyloggers.

Worm:W32/Mytob.A
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Trojan:W32/PFV-Exploit
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Other:W32/Zone.Identifier
A program which does not easily fit into any other malware category.

Trojan:W32/Qhost
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Trojan:W32/Agent.DKJC
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Trojan:SymbOS/MapUp
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Trojan:AndroidOS/Tapsnake
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Worm:W32/Downadup.A
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Email-Worm:W32/Bagle.GE
This type of worm is embedded in an e-mail attachment, and spreads using the infected computer's e-mailing networks.

Virus:W32/Bursted
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Trojan-Downloader:W32/Fakerean.gen!A
This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Trojan-Downloader:W32/Wimad.gen!A
A trojan that secretly downloads malicious files from a remote server, then installs and executes the files.

Trojan-Downloader:W32/Oficla
This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Virus:W32/Sality
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Trojan-Downloader:W32/Hiloti
This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Trojan-Spy:W32/Zbot
This type of trojan secretly installs spy programs and/or keylogger programs.

Virus:W32/Tenga.A
A program that secretly and maliciously integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Other:W32/Heuristic
The file appears to be suspicious, is potentially undesirable, or may be structured in a way or has characteristics that resembles known malware. This may indicate the presence of a malware infection, or that the suspect file is malicious.

Trojan-PSW:W32/OnlineGames.gen!
The file appears to be suspicious, is potentially undesirable, or may be structured in a way or has characteristics that resembles known malware. This may indicate the presence of a malware infection, or that the suspect file is malicious.

Spyware:OSX/OpinionSpy
This program negatively affects a user's control of their computer system or browsing experience, usually without their consent or knowledge.

Trojan:AndroidOS/Fakeplayer.A
Also known as a trojan horse program, this is a deceptive program that performs additional actions without the user's knowledge or permission. It does not replicate.

Worm:W32/Worm
A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

Other:W32/Mail Bomb
A program that does not fall into any other category.

Virus:W32/Redlof
A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

Trojan:W32/Krypt
A trojan, or trojan horse, is a seemingly legitimate program which secretly performs other, usually malicious, functions. It is usually user-initiated and does not replicate.

Other:W32/Joke
A program that does not fall into any other category.

Hack-Tool:W32/Hack-Tool
A utility designed to access remote computers. Though legal, a hacktool can be used with malicious intent.

Backdoor:W32/PcClient.YW
A remote administration utility which bypasses normal security mechanisms to secretly control a program, computer or network.