Detected Win32:sirefef-aoo By Antivirus? How To Remove?

You may bewilder that why you suffered from a virus, even you installed variety of top antivituses. Do you know why? Obviously, the viruses are made by those people who knows antivirus well. Since most of the computers have installed anti-virus. The virus must be able to avoid the detecting of anti-virus so that it can enter the target system silently. So it’s useless even you have anti-virus in the computer. It is the reason why many users don’t know when the virus enters their computers. Recently, Many people infected with a nasty Trojan horse virus called Win32:sirefef-aoo.

Description of Win32:sirefef-aoo

Win32:sirefef-aoo has been mentioned in extermination failure complaints posted by many PC users. In spite of that their software products were able to identify and describe the problem; they did not succeed in exterminating components of the malware as the report on its detection was flagged roughly every 5 minutes. As the trojan has various payloads, including banking credentials targeting, anxiety of users doing banking online is well understood. Besides, It frequently bundled with different kinds of unknown malwares such as Win32:sirefef-xys and Win32:sirefef-xaz . These viruses are even more powerful than Win32:sirefef-aoo itself. They are taken all RAM and CPU room which will make your computer performing badly and crashing all the time. In this circumstance, you will find that even if you just open one or two programs. The RAM and CPU are taken completely. Once install, it will change your desktop background and show various fake security messages. Win32:sirefef-aoo has the ability to redirect the users to malicious websites while they are normally surfing the internet. What’s worse, this threat is usually distributed with spam email messages, so you should never open an attachment from an unknown sender unless you are sure it is safe.

Where had it come from

1. Browsing Webpages- Most of the people go through browsing malicious webpages through their computers which are completely contained with various malicious agents which enters the PC while browsing, and make various unintentional changes in the system settings, browser settings, and Windows Registry settings. Since these settings in computers are essential to run the PC efficiently, if something goes wrong with them, it’s obvious for system get infected with Trojan Horse Win32:sirefef-aoo.

2. Peer to peer file sharing over the connected network- sharing various kinds of files such as freewares, documents, video or audio files, etc over the peer to peer connection over the internet can also be the possible cause of Trojan Horse Win32:sirefef-aoo infections get stroked to computers.

3. Outdated security programs- PC users installs various kinds of third party security programs such as firewalls, antivirus software, etc to remove all possible infections from their system, but while using it, they unfortunately forget to update them regularly so that the program get outdated, and due to unawareness of latest spyware signatures, infections like Trojan Horse Win32:sirefef-aoo get intrudes into PCS.

4. Downloading free-wares or other data from untrusted links- Most of the spyware infections like Trojan Horse Win32:sirefef-aoo are caused in the system due to downloading various data such as movies, ebooks, documents , music files, etc from the links or webpages which are completely or partially untrusted.

If you failed to remove Trojan Horse Win32:sirefef-aoo, please consult YooCare certified professionals to remove it completely.

Why Antivirus Program Cannot Help You?

To receive help, many people would use different kinds of antivirus programs (AVG, Norton, Mcafee, Avast, MSE, Spybox) to remove it but failed. Do you know why? Because it can change its code daily or more often that no program can keep up to remove it. So, even though you have the top antivirus program installed, it still gets through without your consent. After it gets in and has taken over your computer, you just won’t able to download or run any security tool properly to get rid of the malware. In such circumstance, manual removal is required.

Trojan Horse Win32:sirefef-aoo is really a nasty infection!

  1. It is a nasty Trojan parasite
  2. It may show fake security & messages
  3. It may display numerous annoying advertisements
  4. It may be controlled by a remote person
  5. It may come with additional spyware
  6. It violates your privacy and compromises your security

How to get rid of Trojan Horse Win32:sirefef-aoo manually?

Steps1: launch your computer in Safe Mode with Networking
1. Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer.
2. After hearing your computer beep once during startup, start pressing the F8 key on your keyboard. On a computer that is configured for booting to multiple operating systems, you can press the F8 key when the Boot Menu appears.
3. On the Advanced Boot Options screen, use the arrow keys to highlight Safe Mode with Networking, and then press ENTER.

Video tutorial on how to modify or change Windows Registry:

Step 2: Press CTRL+ALT+DEL or CTRL+SHIFT+ESC. Open the Windows Task Manager.
If that didn’t work, try another way. Press the Start button and click on the Run option. This will start the Run tool. Type in taskmgr and press OK. This should start the Windows Task Manager

Steps3: Within the Windows Task Manager click on the Processes tab. Find the process by names:[ransom].exe. Then scroll the list to find required process. Select it with your mouse or keyboard and click on the End Process button.

Step5: All associated files of Trojan Horse Win32:sirefef-aoo should be deleted absolutely.


Step6: Remove these Trojan Horse Win32:sirefef-aoo Registry Entries:

“EnableShellExecuteHooks”= 1 (0×1)

Attention: As can be seen, Trojan Horse Win32:sirefef-aoo is a very hazardous virus which usually bundled with other Trojans. They will take all RAM and CPU room which will make your computer performing badly and crashing all the time. Please don’t consider to remove this nasty virus automatically since it can escape all kinds of top antiviruses such as AVG, Norton, Mcafee, Avast, MSE, Spybox, etc. So, don’t download unknown so called “free” antivirus, which won’t resolve your problem and may lead you to another virus.All the instructions above are prepared for those who have much computer knowledge and are familiar with this kind for virus.If you haven’t sufficient expertise in dealing with program files, processes, dll files and registry entries, it may lead to mistakes damaging your system.Before you begin to eliminate such infection, You should think it twice. On the other hand, all the instructions above is aim at the common infection situation. As for Trojan Horse Win32:sirefef-aoo, there are many variables according to different computers. What’s worse, as time goes by, Trojan Horse Win32:sirefef-aoo may change itself to other versions, which adds more difficult to the removal . As we mentioned above, this virus infection is a cascaded infection. The related files or may be changed. Unless you specialize in virus removal, to remove a browser hijacker is a complex task.

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