Trojan-Downloader.Win32.VB.aoff
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Threat Metric
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The following fields listed on the Threat Meter containing a specific value, are explained in detail below: Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model. Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter. Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count. Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement. % Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage. |
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Trojan-Downloader.Win32.VB.aoff Description
Trojan-Downloader.Win32.VB.aoff is a Brazilian banking Trojan which pretends to be a Microsoft anti-malware program. Trojan-Downloader.Win32.VB.aoff targets Windows systems by removing built-in security applications and allows cybercriminals to steal banking credentials from affected computer users. Trojan-Downloader.Win32.VB.aoff affects 'ntldr', the default boot loader on Windows PCs. Trojan-Downloader.Win32.VB.aoff propagates as a link attached to emails. Once PC users click on the malicious link, Trojan-Downloader.Win32.VB.aoff downloads two malicious files from Amazon's Web Services cloud. These files, named 'xp-msantivirus' and 'xp-msclean', worm their way onto the computer's bootloader, a component that gets executed before the startup of the PC's operating system. The aims of the malicious files, promoted as msantivirus and msclean, is to look like legitimate Microsoft anti-virus software and computer cleanup tools, but in reality, they are exactly the opposite.
When these malicious files attack the Microsoft ntldr bootloader, they substitute it with a new, malicious one, a version of GRUB, an open-source bootloader, which they adjust to perform their commands. Without drawing attention to itself, the new bootloader starts the computer into Linux or Unix software that deletes a common Brazilian bank-security plugin, while also eliminating the PC system's built-in Microsoft security program, opening it up to further potential malware attacks. This dubious change takes place before the computer has even booted up; and worse, it automatically deletes itself and resets the original bootloader, so affected users have no idea their security has been compromised. All they're aware of during this whole bait-and-switch is that the bootup is taking a little longer than usual, but the attack clarifies that with a fake message stating to be from Microsoft that says it is actually 'removing malicious files'. You should run up-to-date and reliable anti-virus and anti-malware software on your PC to get rid of Trojan-Downloader.Win32.VB.aoff.
Use SpyHunter to Detect and Remove PC Threats
If you are concerned that malware or PC threats similar to Trojan-Downloader.Win32.VB.aoff may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.
Download SpyHunter's Malware ScannerNote: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria.
Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.
Technical Details
File System Modifications
The following files were created in the system:
5.exe
File name: 5.exeSize: 237.46 KB (237468 bytes)
MD5: 9c7f6100153538b8f511002b4912352c
Detection count: 36
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: December 9, 2011
file.exe
File name: file.exeSize: 9.72 KB (9728 bytes)
MD5: a3e8e8153ee75d584c112bd0373f8c1e
Detection count: 35
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: December 9, 2011
