What is a Trojan Horse? Is it Malware or a Virus? Trojan malware takes its name from the classical story of the Trojan horse, because it imitates the technique to infect computers. A Trojan will hide within seemingly harmless programs, or will try to trick you into installing it. Trojans do not replicate by infecting other files or computers. Instead, they survive by going unnoticed. They may sit quietly in your computer, collecting information or setting up holes in your security, or they may just take over your computer and lock you out. What do Trojans do? Because Trojans are so versatile and can go unnoticed, their popularity has exploded until they've become the malware of choice for many online criminals. Some of the more common actions that Trojans take are: Creating backdoors: Trojans typically makes changes to your security system so that other malware or even a hacker can get in. Spying: some Trojans are essentially Spyware designed to wait until you access your online accounts or enter your credit card details, and then send your passwords and other data back to their master. Turn your computer into a Zombie! The computer game you downloaded from a strange website. Even an advertisement might try to install something on your computer. Some Trojans are specifically designed to trick you into using them. They can use misleading language or try to convince you they are a legitimate app. Tricking you this way is called social engineering, because the criminals designed a situation to make you act against your interest. How do I protect myself against Trojans? Staying away from questionable sites, pirated materials, and dubious links may help, but in the long run something will get through. If you truly want to stay protected, you need an anti- malware software like AVG Anti. Trojan Horse or Trojan: It’s Not All a Myth. A Trojan horse (also known as a Trojan) is one of several kinds of malware you might find on your computer after a. A Trojan horse containing malware may also be referred to as simply a Trojan or a Trojan horse. Crimeware: Trojans & Spyware. What is a Trojan Horse? A Trojan horse is a program that looks helpful but actually lets a. They work the same way the ancient Trojan horse did. Read the Press Release. Take a virtual tour of our U. Virus FREE to stay protected. Even security experts rely on some form of protection to keep them safe. AIDS (Trojan horse) - Wikipedia, the free encyclopedia. AIDS Trojan. Common name. PC Cyborg Trojan. Technical name. Aids Info Disk/PC Cyborg Trojan. Aliases. AIDS! Trojan, Aidsinfo. B trojan, Cyborg, Trj/Aids. Info. Aids. Info. Trj/Aids. Info. Aids. Info. b, Trojaids! Trojan, Love virus. Family. AIDS Trojan. Classification. Trojan. Type. DOSSubtype. DOS scrambler. Isolation. Point of isolation. Europe. Point of origin. United States. Author(s)Dr. Joseph Popp. AIDS, also known as Aids Info Disk or PC Cyborg Trojan, is a trojan horse that replaces the AUTOEXEC. BAT file, which would then be used by AIDS to count the number of times the computer has booted. Once this boot count reaches 9. AIDS hides directories and encrypts the names of all files on drive C: (rendering the system unusable), at which time the user is asked to 'renew the license' and contact PC Cyborg Corporation for payment (which would involve sending 1. US$ to a post office box in Panama). There exists more than one version of AIDS, and at least one version does not wait to munge drive C: , but will hide directories and encrypt file names upon the first boot after AIDS is installed. The AIDS software also presented to the user an end user license agreement, some of which read: If you install . Evolutionary biologist Dr. Joseph Popp, was identified as the author of the AIDS trojan horse and was a subscriber to this list. Popp was eventually discovered by the British anti- virus industry and named on a New Scotland Yardarrest warrant. He was detained in Brixton Prison. Though charged with eleven counts of blackmail and clearly tied to the AIDS trojan, Popp defended himself by saying money going to the PC Cyborg Corporation was to go to AIDS research. A Harvard- trained anthropologist, Popp was actually a collaborator of the Flying Doctors, a branch of the African Medical Research Foundation (AMREF), and a consultant for the WHO in Kenya, where he had organized a conference in the new Global AIDS Program that very year . Popp had been behaving erratically since the day of his arrest during a routine baggage inspection at Amsterdam Schiphol Airport. He was declared mentally unfit to stand trial and was returned to the United States. He wrote that the AIDS Trojan did not alter the contents of any of the user's files, just their file names. He explained that once the extension and filename encryption tables are known, restoration is possible. AIDSOUT was a reliable removal program for the Trojan and the CLEARAID program recovered encrypted plaintext after the Trojan triggered. CLEARAID automatically reversed the encryption without having to contact the extortionist. The AIDS Trojan was analyzed even further a few years later. Young and Yung pointed out the fatal weakness in malware such as the AIDS Trojan, namely, the reliance on symmetric cryptography. They showed how to use public key cryptography to implement a secure information extortion attack. They published this discovery (and expanded upon it) in a 1. IEEE Security and Privacy paper . A cryptovirus, cryptotrojan, or cryptoworm hybrid encrypts the victim's files using the public key of the author and the victim must pay (with money, information, etc.) to obtain the needed session key. This is one of many attacks, both overt and covert, in the field known as Cryptovirology. Virus Bulletin Ltd., Oxon, England, Jan., pages 3. Virus Bulletin Ltd., Oxon, England, Feb., pages 8. Glough, Approaching Zero: The Extraordinary Underworld of Hackers, Phreakers, Virus Writers, and Keyboard Criminals. New York, NY, Random House, 1. Taylor, Hackers: Crime in the Digital Sublime, London, Routledge, 1. IEEE Computer Society Press, Washington DC, pages 1.
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