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A Trojan downloader is usually a standalone program that attempts to secretly download and run other files from remote web and ftp sites. Typically Trojan downloaders download a numerous variety of Trojans and backdoors and activate them on an affected system without your approval.
Trojan downloader, when running, installs itself onto the computer system and waits patiently until Internet connection becomes available. After that it attempts to connect to a web or ftp site, downloads a specific file or files and runs them.
If your system has a Trojan Downloader aboard, it means your system is running amuck with malicious files and programs. Before we explain how we’ve come to this conclusion, let’s first define what a basic Trojan is.
In cyberspace, a Trojan or Trojan horse is the label given a type of malicious program infamous for using guises to trick PC users into opening the front door, i.e. clicking and thus authorizing the download of its files and program. In other words, a Trojan horse presents as an innocent or helpful tool, when in fact its malicious code or scripting contained therein is planned to carry out the criminal intent of its creator. Criminal intent could involve theft of data or misuse of system resources to jam up the traffic of targeted computer systems, so called a DNS (Denial of Service) strike or attack.
A Trojan can be built to carry out a specific attack or behavior and the identifier or detection assigned may give hint as to what this entails. To trick an unwary PC user into clicking and downloading its files, a Trojan may be hidden behind a fake Adobe Flash update, Windows security alert or video codec component prompt. Trojans can also be hidden behind a tantalizing link or tease planted in a cleverly written email spam communication or on the friendly grounds of social networking platforms. Malware makers exploit legitimate processes to position their poisonous links atop popular search engine results pages, turning the Internet into an explosive landmine. The wrong step could land a PC user onto a compromised website housing a Trojan Downloader.
Trojan Downloaders are different than other Trojan types because they are able to exact a drive-by attack or automatic download without further aid of its victim. Automatic download is made possible after the Trojan Downloader exploits scripting in the back-end of the compromised website. If the computer system of the web-page visitor (i.e. PC user) is not properly guarded, upon landing, the Trojan Downloader will automatically download malicious files without any further help or action of the victim.
Most malicious programs, Trojans included, are designed to stay resident and work in the background while the victim is none-the-wiser. Trojans are stealth and can make system changes comparable to that of an expert programmer or IT expert. Some behaviors or system changes you can expect include:
Payloads are dependent on the wishes of the malware maker or buyerm, and at a minimum, include one or more of the following:
While some malware can be manually removed, malicious programs fortified by rootkit technology may warrant use of professionals, i.e. tools or IT personnel. Rootkit technology helps mask and bury malicious files in the root of the infected system where many antivirus programs cannot scan. Rootkit technology masks malicious files so they read the same as legitimate operating system files. Removing the wrong file could easily corrupt the hard drive and leave the victim staring at the blue screen of death (BSOD).
In the absence of a proper alert or warning from a trusted scanning tool, weird system behaviors may be the only hint a malicious program or Trojan is aboard. Therefore, if your system suddenly runs slow, web pages freeze up or you are experiencing reroutes to unwanted URLs, these could all be signs of an intrusion. At any hint of an intrusion, you should grab hold of a reliable and stealth scanning tool to dig deep to uncover and annihilate found intruders, even the resistant ones.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Detections: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
|Chanitor||90 % (High)||586|
|Downloader.Agent2.BDGM||90 % (High)||276|
|Downloader.Ajuxery||70 % (High)||3|
|Downloader.AUO||90 % (High)||2|
|Downloader.Blackbeard||90 % (High)||7|
|Downloader.Castov||10 % (Normal)||9,521|
|Downloader.Castov.B||70 % (High)||19,342|
|Downloader.Chepvil||80 % (High)||0|
|Downloader.Dashikut||20 % (Normal)||474|
|Downloader.Delphi||90 % (High)||0|
|Downloader.Drepitt||90 % (High)||1,062|
|Downloader.Dromedan||100 % (High)||7|
|Downloader.Eldorado.C||90 % (High)||64|
|Downloader.Generic14.HTD||70 % (High)||25,941|
|Downloader.Krakrues||80 % (High)||0|
|Downloader.Liftoh||50 % (Medium)||100|