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Infected with sirefef trojan

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I think my computer has been infected with the siref trojan. The message "Windows has encountered a critical problem and will restart automatically in one minute. Please save your work now." appears and the computer shuts down shortly afterwards, only to reboot itself and start the cycle once more.

In the one minute I have before it shuts down I have been able to access Microsoft Security Essentials and see what threats have been detected. This is where it mentions the siref trojan.

I am operating on the Windows 7 Home Premium operating system.

I have tried to boot in safe mode but the same thing happens.

Please can anyone help? Please bear in mind I have only 1 minute to do anything once I have booted up before it shuts down. Please also bear in mind I am not very technical and I have never had to deal with this type of threat before.

Thank you in advance.

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Hello Chewitt73,

IF you cannot do downloads on "this" system, you will need to use another pc for that purpose.

I suggest you get and run the Microsoft Windows Defender Offline. This is an "offline" tool that you boot the pc with and scan your system for malware.

To get started, find a blank CD, DVD, or USB flash drive with at least 250 MB of free space and then download and run the tool—the tool will help you create the removable media.

The basic sequence of steps are

a) Download and SAVE the tool to a unique folder/location on your pc

b) Create the CD/DVD/USB-flash drive with tool

c) Set pc to boot from the offline media

d) Place media in & restart system

e) Run the tool. Have infinite patience & have it scan the entire system. Remove any malware that is found.

Download & info link http://windows.micro...efender-offline

The frequently asked questions for this tool


Also, the malware is Sirefef -- a severe trojan infection. It is quite possible your data & personal information has been lifted, and is compromised.

This system likely has some serious backdoor trojans, spyware, and likely, a rookit.

This is a point where you need to decide about whether to make a clean start.

According to the information provided in logs, one or more of the identified infections is a backdoor trojan. This allows hackers to remotely control your computer, steal critical system information, and download and execute files.

You are strongly advised to do the following immediately.

1. Call your banks, credit card companies, financial institutions and inform them that you may be a victim of identity theft and ask them to put a watch on your accounts or change all your account numbers.

2. From a clean computer, change ALL your online passwords -- for email, for banks, financial accounts, PayPal, eBay, online companies, any online forums or groups.

3. Do NOT change passwords or do any transactions while using the infected computer because the attacker will get the new passwords and transaction information.These trojans leave a backdoor open on the system that can allow a hacker total and complete access to your computer. (Remote access trojan) Hackers can operate your computer just as if they were sitting in front of it. Hackers can watch everything you are doing on the computer, play tricks, do screenshots, log passwords, start and stop programs.

* Take any other steps you think appropriate for an attempted identity theft.

You should also understand that once a system has been compromised by a Trojan backdoor, it can never really be trusted again unless you completely reformat the hard drives and reinstall Windows fresh. While we usually can successfully remove malware like this, we cannot guarantee that it is totally gone, and that your system is completely safe to use for future financial information and/or transactions. I would recommend that you do a full reformat and reinstall of Windows rather than clean the system.

I suggest that you backup important files and reinstall everything from scratch. There are so many changes that could have been done if that backdoor was used.

Here is some additional information: What Is A Backdoor Trojan? http://www.geekstogo...backdoor-trojan

Danger: Remote Access Trojans http://www.microsoft...o/virusrat.mspx

Consumers – Identity Theft http://www.ftc.gov/b...mers/index.html

When should I re-format? How should I reinstall? http://www.dslreports.com/faq/10063

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud? http://www.dslreports.com/faq/10451

Rootkits: The Obscure Hacker Attack http://www.microsoft...tip/st1005.mspx

Help: I Got Hacked. Now What Do I Do? http://www.microsoft...gmt/sm0504.mspx

Help: I Got Hacked. Now What Do I Do? Part II http://www.microsoft...gmt/sm0704.mspx

Microsoft Says Recovery from Malware Becoming Impossible http://www.eweek.com...,1945808,00.asp

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