Win32:Mutama

Posted: August 8, 2012

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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.

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% 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.

Ranking:	5,198
Threat Level:	5/10
Infected PCs:	389

First Seen:	August 10, 2012
Last Seen:	October 16, 2023
OS(es) Affected:	Windows

Win32:Mutama is a worm that uses Autorun exploits to transfer itself to removable USB drives to infect other PCs. Files that have been known to harbor Win32:Mutama include various types of malicious EXE files and fake JPG files, many of which bear names that are intended to entice PC users from Indonesia, Vietnam or Korea. Symptoms of infection by Win32:Mutama can include poor OS performance and an inability to delete directories that are used to store concealed Win32:Mutama files. Win32:Mutama attacks have been reported against English-speaking PC users as of late July 2012, and SpywareRemove.com malware experts note that Win32:Mutama should be considered an actively-distributed PC threat to be guarded against and deleted by appropriate anti-malware products.

The Not-So-Basic Techniques in How Win32:Mutama Gets Around

Win32:Mutama is coded in Visual Basic and is compatible with certain versions of Windows, and displays, like many VB-based PC threats, a worm-style strategy for reproduction and distribution. Win32:Mutama copies itself to other drives automatically, conceals its files with Hidden or System flags, and then disables your ability to view files with these flags. Win32:Mutama-infected drives can include removable drive devices (such as USB drives) that can infect other PCs with Win32:Mutama once they're plugged into a new computer.

Even if Win32:Mutama's locations is divined, deleting Win32:Mutama without shutting Win32:Mutama down first will prove to be impossible, since you'll only receive errors about the folder in question being 'in use.' Win32:Mutama launches automatically with Windows due to Registry-based startup exploits, and SpywareRemove.com malware experts recommend that you counter this attack by booting your computer in Safe Mode. You may also boot your PC from a removable HD device, although, of course, this can risk infection by Win32:Mutama.

SpywareRemove.com malware experts are still analyzing Win32:Mutama's payload, although probable effects include the installation of other PC threats, exploitation of botnet-related functions or the creation of backdoor security holes.

Exterminating a Win32:Mutama Pest from Drive to Drive

Win32:Mutama may also be accompanied by other PC threats, particularly Visual Basic-based ones like Win32:VB-UBR, VBS:Malware-Gen, and autorun-gen@bhv. Win32:Mutama's aliases, variable according to the anti-malware program that detects Win32:Mutama, include W32.SillyFDC, Worm.VB.CJ and Worm.Win32.VB. SpywareRemove.com malware experts have confirmed Win32:Mutama's compatibility with 64-bit Windows 7 environments, although other versions of Windows are awaiting confirmation.

While any competent anti-malware scanner should be able to remove Win32:Mutama, you should be certain to scan all hard drives, including removable ones, to delete every copy of Win32:Mutama. Likewise, SpywareRemove.com malware researchers recommend that you avoid sharing USB devices with other PCs until you can confirm that Win32:Mutama isn't infecting them. Installation routines for Win32:Mutama take place automatically, silently and without your permission, assuming a compatible OS for the PC that accesses the removable device.

Technical Details

Additional Information

The following URL's were detected:

find.cnavigate-on.comhistcleaner.com