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Danger level 6
Type: Trojans
Common infection symptoms:
  • Cant change my homepage
  • Connects to the internet without permission
  • Installs itself without permissions
  • Slow Computer
  • Slow internet connection
  • System crashes


Even though Trojans cannot spread on their own accord they are one of the most common infections nowadays that are responsible for ruining multiple computers worldwide. Trojan.Sinis.C is only one of the many Trojan infections out there, but it does not mean you should overlook it and allow it to stay in your system. If you have this malicious application running on your computer, you are advised to remove Trojan.Sinis.C as swiftly as possible, or else you might experience a number of annoying symptoms that will be hard to get rid of.

Trojan.Sinis.C actions depend directly on the hacker who controls the program, because once the Trojan slithers into the system (via spam email or bundled together with a shareware program), it cannot do anything unless it receives orders from its creator via the network. What it certainly does on its own is dropping a list of files into the temporary folder at the directory C:\documents and settings\administrator\local settings\temp. Since there are no obvious symptoms of this infection aside from the fact that your system becomes slower and slower, you might as well perform the search of files related to Trojan.Sinis.C. For example, blowfish.dll, nsisarray.dll, nsisdl.dll or svchost.exe (this svchost.exe is a fake one, because the real process file is located in the System folder. The Trojan only tries to fool you into believing that the malicious process is the real one).

The main malevolent thing Trojan.Sinis.C does is modifying the Windows Hosts file. The Trojan edits the file so that it would redirect you to particular IP addresses when you type in certain URLs into your Internet browser. Most of the time Trojan.Sinis.C modifies the Hosts file in a way that later on the user cannot access computer security-related websites, thus allowing the Trojan to thrive in a completely antimalware-free environment.

Also, Trojan.Sinis.C connects to the Internet in secret and contacts a remote host at to report to the hacker than a new computer has been infected. Then it can easily download and install additional malware onto your computer, at the same time stealing various data and sending it over to its creator. In the long run, Trojan.Sinis.C can cause a complete system paralysis, so in order to avoid that you have to terminate it at once.

Manual Trojan removal is rather challenging, especially if you usually do not meddle with the system files. A better option is to erase Trojan.Sinis.C automatically with an antimalware program. Not only will the program terminate the Trojan and its components, with the program on board you can be sure that no other threat will enter your system again.

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How to manually remove Trojan.Sinis.C

Files associated with Trojan.Sinis.C infection:


Trojan.Sinis.C processes to kill:


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