Known trojan viruses

The common Trojan viruses symptoms can also cause that slowness because it must be using many resources. One of the common Trojan viruses symptoms is a slow Internet. Many times, you might not be able to connect to it either. When you know that everyone else in the house or office can connect, be warned. That's one of the common Trojan viruses symptoms. When you're infected, the Trojan horse virus could be connecting to a URL or opening separate connection sessions.

Because of that, it reduces the available bandwidth or it makes it hopeless to use the Internet. An application you really need isn't working at all after minor troubleshooting must be one of the common Trojan viruses symptoms.

Some programs can work but some of your programs is won't. You should go check all of your security tools and system to be sure. Are there unwanted windows and browsers that display pages? This is a strong indication of a common Trojan viruses symptoms. The unwanted redirection of traffic to another deceitful website. This can trick you to use a fake website which you won't notice at all.

This is one of the scariest Trojan horse virus symptoms. Your important files that are missing might have been manipulated by a Trojan virus. The Trojan horse can delete or encrypt information, or move your files to another place.

You should be worried when this thing happens to you. It's not only files that can disappear in your computer, your antivirus and firewall functions can be turned off during the common Trojan viruses symptoms. This makes your computer a lot more vulnerable to cyber attacks. A serious computer security issue is already happening and you should react to it quickly. Your computer language suddenly changed without your knowledge.

It's a giveaway common Trojan viruses symptoms. This could be additional Trojans or other types of malware like adware. Exploit Trojan : An exploit malware program contains code or data that takes advantage of specific vulnerabilities within an application or computer system.

The cyber criminal will target users through a method like a phishing attack, then use the code in the program to exploit a known vulnerability. Fake antivirus Trojan : A fake antivirus Trojan simulates the actions of legitimate antivirus software. The Trojan is designed to detect and remove threats like a regular antivirus program, then extort money from users for removing threats that may be nonexistent.

Game-thief Trojan : A game-thief Trojan is specifically designed to steal user account information from people playing online games. Infostealer Trojan : This malware can either be used to install Trojans or prevent the user from detecting the existence of a malicious program. The components of infostealer Trojans can make it difficult for antivirus systems to discover them in scans. Mailfinder Trojan : A mailfinder Trojan aims to harvest and steal email addresses that have been stored on a computer.

The attacker will then hold the user or organization ransom until they pay a ransom fee to undo the device damage or unlock the affected data. The cyber criminal maintains access to the device through a remote network connection, which they use to steal information or spy on a user. Its purpose is to stop malicious programs from being detected, which enables malware to remain active on an infected computer for a longer period.

This includes logging their keyboard actions, taking screenshots, accessing the applications they use, and tracking login data. Victims were compromised by trojanized versions of a legitimate SolarWinds digitally signed file named: SolarWinds. The trojanized file is a backdoor. Once on a target machine, it remains dormant for a two-week period and will then retrieve commands that allow it to transfer, execute, perform reconnaissance, reboot and halt system services.

Communication occurs over http to predetermined URI's. How To Recognize a Trojan Virus. Examples of Trojan Horse Virus Attacks. Well-known examples of Trojans include: Rakhni Trojan: The Rakhni Trojan delivers ransomware or a cryptojacker tool—which enables an attacker to use a device to mine cryptocurrency—to infect devices.

It was discovered when it infected at least 20 U. Zeus or Zbot: Zeus is a toolkit that targets financial services and enables hackers to build their own Trojan malware. The source code uses techniques like form grabbing and keystroke logging to steal user credentials and financial details.

How Fortinet Can Help. Quick Links. Online Demo Explore key features and capabilities, and experience user interfaces. Resource Center Download from a wide range of educational material and documents. A viral virus, by all accounts. Two young Filipino programmers, Reonel Ramones and Onel de Guzman, were named as the perps but because there were no laws against writing malware, their case was dropped and they went free. MyDoom is considered to be the most damaging virus ever released—and with a name like MyDoom would you expect anything less?

A version of the virus allegedly hit the SCO website with a boatload of traffic in an attempt to crash its servers. Who was Andy? Who knows. Storm Worm was a Trojan horse that infected computers, sometimes turning them into zombies or bots to continue the spread of the virus and to send a huge amount of spam mail.

By July , Storm Worm was picked up in more than million emails. Sasser spread through infected computers by scanning random IP addresses and instructing them to download the virus. Netsky was the more familiar email-based worm. Netsky was actually the more viral virus, and caused a huge amount of problems in A German student, Jaschan was arrested when multiple tip-offs were reported to the police.

Because he was under 18 when he wrote the virus, Jaschan spent his prison sentence on probation. MyDoom was spreading rapidly at the time and Jaschan, a newbie coder, wanted to see what would happen if his bug could spread faster than MyDoom.

Things quickly escalated from there. Sasser was so effective it actually ground one third of the post offices in Taiwan to a halt, shut down branches of a Finnish bank, and forced rail and transatlantic flights to be cancelled. Quite a lot, as it so happens. So in the early to mid-noughties, Anna Kournikova was one of the most searched terms on the internet. People were just very into tennis. The mayor of the town came forward and said the city should be proud to have produced such a talented young man and offered him a job as a techie once he was finished his education.

While most of the malware on this list strictly hit computers, Slammer was created with broader ambitions. Slammer is the kind of virus that makes it into films, as only a few minutes after infecting its first victim, it was doubling itself every few seconds. Slammer, quite aptly, caused a huge panic as it had effectively managed to crash the internet in 15 quick minutes. Stuxnet is easily the scariest virus on the list as it was built by government engineers in the US with the intention of obstructing nukes from being built in Iran.

Stuxnet spread by a USB thumb drive and targeted software controlling a facility in Iran that held uranium.