Trojan:Win32/Sefnit.AU

Posted: September 25, 2013

Threat Metric

The Threat Meter is a malware assessment that SpywareRemove.com's research team is able to give every identifiable malware threat. Our Threat Meter includes several criteria based off of specific malware threats to value their severity, reach and volume. The Threat Meter is able to give you a numerical breakdown of each threat's initial Threat Level, Detection Count, Volume Count, Trend Path and Percentage Impact. The overall ranking of each threat in the Threat Meter is a basic breakdown of how all threats are ranked within our own extensive malware database. The scoring for each specific malware threat can be easily compared to other emerging threats to draw a contrast in its particular severity. The Threat Meter is a useful tool in the endeavor of seeking a solution to remove a threat or pursue additional analytical research for all types of computer users.

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.

Threat Level:	9/10
Infected PCs:	87

First Seen:	September 25, 2013
Last Seen:	October 17, 2019
OS(es) Affected:	Windows

Trojan:Win32/Sefnit.AU is the installation-handling member of the Sefnit family of Trojans, which are capable of launching varied attacks including distributing themselves, opening backdoor vulnerabilities and downloading new threats. As the Trojan that usually is responsible for installing other Sefnit components, Trojan:Win32/Sefnit.AU may be detected as the initial threat in attempted drive-by-downloads and other attacks that try to infect your computer. SpywareRemove.com malware experts classify all members of the Sefnit family as high-level PC threats due to the severity of their security implications, and recommend using anti-malware programs to remove Trojan:Win32/Sefnit.AU – or, better yet, to prevent Trojan:Win32/Sefnit.AU from being installed at all.

Trojan:Win32/Sefnit.AU: the Maintenance Man for the Software You Don't Want on Your PC

Trojan:Win32/Sefnit.AU is one of several components of a standard Sefnit infection, which is a broadly-capable backdoor Trojan with attack capabilities that allow criminals to control your PC and use its resources for further criminal acts. In many ways, Trojan:Win32/Sefnit.AU can be considered the central pillar of the Sefnit family – since Trojan:Win32/Sefnit.AU is responsible for both the installation and the updating of other Sefnit components. As a result, Sefnit attacks that try to infect your PC may be detected as Trojan:Win32/Sefnit.AU. As long as your anti-malware programs catch Trojan:Win32/Sefnit.AU before Trojan:Win32/Sefnit.AU installs other Sefnit Trojans.

Although Trojan:Win32/Sefnit.AU's functions stop and start with its installation and updates for other Trojans, an overall Sefnit infection may be put to multiple purposes. Malware researchers have outlined some of the most harmful and common of these attacks:

The automatic download and installation of other kinds of threats.
Pay-per-click fraud functions that take up your PC's resources to generate revenue via artificial 'clicks.' These attacks sometimes take up sufficient PC resources to harm your operating system's overall stability or performance.
Distributing Sefnit through P2P (or peer-to-peer) networks.
Hijacking your search results to redirect you to other websites.

Handling All of Your Sefnit Infections, One Trojan at a Time

Removing Trojan:Win32/Sefnit.AU is an important part of dealing with any basic Sefnit infection, but other members of the Sefnit family also must be dealt with before your computer will be safe from the attacks listed above. While SpywareRemove.com malware experts naturally encourage using anti-malware tools to help you get rid of Trojan:Win32/Sefnit.AU, you also may need to use additional security procedures to assist with these anti-malware scans, such as restarting your PC in Safe Mode.

Trojan:Win32/Sefnit.AU is most likely to be encountered while downloading pirated content through P2P networks or downloading fake Flash updates. In many cases, SpywareRemove.com malware experts have found that Trojan:Win32/Sefnit.AU may be installed along with some unrelated applications, and since Trojan:Win32/Sefnit.AU's attacks don't leave any obvious symptoms, you often will need the right anti-malware software to have any hope of finding Trojan:Win32/Sefnit.AU before any damage is done.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

FlashPlayerUpdateService.exe

File name: FlashPlayerUpdateService.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

%windir% \Tasks\AdobeFlashPlayerUpdate.job

File name: %windir% \Tasks\AdobeFlashPlayerUpdate.job
Mime Type: unknown/job
Group: Malware file

%windir% \Tasks\AdobeFlashPlayerUpdate 2.job

File name: %windir% \Tasks\AdobeFlashPlayerUpdate 2.job
Mime Type: unknown/job
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc\Enum "Count" = "0x00000001"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc\Enum "NextInstance" = "0x00000001"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc\Enum "0" = "Root\LEGACY_ADOBEFLASHPLAYERUPDATESVC\0000"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc\Security "Security" = "01 00 14 80 90 00 00 00 9C 00 00 00 14 00 00 00 30 00 00 00 02 00 1C 00 01 00 00 00 02 80 14 00 FF 01 0F 00 01 01 00 00 00 00 00 01 00 00 00 00 02 00 60 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "Type" = "0x00000020"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "ErrorControl" = "0x00000001"folder>\Macromed\Flash\FlashPlayerUpdateService.exe"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "ObjectName" = "LocalSystem"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "Description" = "This service keeps your Adobe Flash Player installation up to date with the latest enhancements and security fixes."HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "FailureActions" = "FF FF FF FF 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00 30 75 00 00"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AdobeFlashPlayerUpdateSvc "DisplayName" = "Adobe Flash Player Update Service"

Additional Information

The following URL's were detected:

http://jameslipon.no-ip.biz/[removed]/tc.c1http://kimberlybroher.no-ip.biz/[removed]/tc.c1http://olivasonny.no-ip.biz/[removed]/tc.c1http://patricevaillancourt.sytes.net/[removed]/tc.c1http://timothymahoney.ddns.me.uk/[removed]/tc.c1http://updsvc.net/[removed]/3f76764a34f81e63df90b61f65b31d75/2.srvupd.comsrvupd.netsvcupd.netupdsrv.netupdsvc.comupdsvc.net