11/10/2022 0 Comments Trojan worm virus![]() ![]() In our example email where a file attachment was included, we could attach a Trojan that contained malware which compromised the target’s system. Trojan horses or Trojans are chunks of malware that pretend to be valid applications or documents. Jeremy Faircloth, in Penetration Tester's Open Source Toolkit (Fourth Edition), 2017 Trojan horses The reality is that the potential for exploitation is only slightly lower with a document than with an executable. In this case, it's just a document being opened and therefore “safer” in the target's eyes. One common ploy is to use a PDF or DOC file to execute arbitrary code on the target system. This technique is not used as frequently as it used to be mainly because many users are finally listening to the security recommendation of “don't run anything sent to you via email.” However, many still haven't gotten the point therefore, it's a valid attack especially with a well-crafted phishing email.Īlso keep in mind that Trojans are not limited to executables! There are still vulnerabilities being discovered and exploited in hundreds of common applications which can be used to your advantage. In that particular case, we could have a Trojan that appears to be some sort of survey answer collection program which installs with a normal installer but in reality installs malware that grants us access to their system. In our example email where a file attachment was included, we could have attached a Trojan that contained malware which compromised the target's system. Trojan horses, or Trojans, are chunks of malware that pretend to be valid applications or documents. Jeremy Faircloth, in Penetration Tester's Open Source Toolkit (Third Edition), 2011 4.2.2.2.2 Trojan horses What makes Trojans stand apart from being classified as viruses is that the Trojan is often a stand-alone program and does not inject themselves into another program. Furthermore, Trojans are often confused with viruses. ![]() The word Trojan is often synonymous with backdoor due to the inherent nature of Trojans today. The actual difference between backdoors and trojan horses have been skewed since the first trojan horse was possibly embedded in a game intended for the UNIVAC 1108 computer system in 1975, known as the Pervading Animal. James Broad, Andrew Bindner, in Hacking with Kali, 2014 Trojan HorseĪ Trojan horse, commonly referred to simply as a “Trojan,” is a malicious program that is installed onto a host to perform a desired, or overt, function, but instead conceals and executes hidden, or covert, programs within its code to create backdoors, run scripts, steal information, and in some cases socially exploit untrained people into divulging personal information such as credit card numbers. The hacker can copy, move, rename, delete, and even change any file or folder in the victim's computer. Both programs allow for complete access to the victim's files. The client is the piece that the attacker will use to monitor the victim's computer. The server is the piece that the “remote administrator” will use to infect the victim's computer. They both come with two pieces of software, the client and the server. Some noteworthy Trojans are ZeuS, ZeroAccess, TDSS Downloader, Alureon, Gbot, Butterfly bot, and BO2K.īackdoors and Trojan horses have several things in common. ![]() This malicious program could hijack future HTTP sessions, monitor the activities on that host, and then relay that information back to the attacker's host and much more. The host is normally quite unaware that a malicious program has been injected. Trojan horses are normally injected into a foreign host while that host is browsing the Internet or downloading free utilities from the Internet. Trojan horses are code disguised as a benign program, but behave in an unexpected manner, usually a malicious manner. Pramod Pandya, in Computer and Information Security Handbook (Third Edition), 2013 Backdoors and Trojan Horses ![]()
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