Trojan win32:sirefef-sm

Posted: May 14, 2012

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:	1/10
Infected PCs:	82

First Seen:	May 14, 2012
Last Seen:	July 30, 2020
OS(es) Affected:	Windows

Trojan win32:sirefef-sm is a backdoor Trojan that hails from the family of Win32/Sirefef, a family of particularly sophisticated Trojans that are known to attack operating system files directly in an attempt to compromise the infected PC's security. Because Trojan win32:sirefef-sm is a sophisticated backdoor Trojan that can conceal its presence from prospective victims, SpywareRemove.com malware researchers warn that equally-advanced anti-malware products should be used to detect and delete Trojan win32:sirefef-sm. Trojan win32:sirefef-sm may be used to install other PC threats, such as banking Trojans, rootkits or rogue security programs, and even after being removed appropriately, Trojan win32:sirefef-sm may have damaged operating system components sufficiently severely to require their replacement from appropriate backup sources.

Trojan win32:sirefef-sm: a Helping Hand to Unscrew Your Computer's Security

Trojan win32:sirefef-sm, like other members of the Sirefef family, is distributed by infected software installation packages, particularly regarding programs that have illicit purposes (such as key generators or DRM-bypassing utilities for popular games). Because Trojan win32:sirefef-sm may not be installed alone and may install other PC threats or include multiple components in its attack, SpywareRemove.com malware experts recommend that you be careful to scan your entire hard drive once you spot Trojan win32:sirefef-sm or any other individual Sirefef-based Trojan. Once Trojan win32:sirefef-sm is installed, Trojan win32:sirefef-sm and related PC threats are most likely to cause the following symptoms, although Sirefef Trojans like Trojan win32:sirefef-sm can also be reconfigured for other hostilities:

Browser hijacks that modify your online search results; typically to redirect you to malicious sites or advertisement-based sites that give PPC revenue to Trojan win32:sirefef-sm's criminal partners.
Contacting a remote host to send personal information to it, as well as to download malicious files or install botnet components that use your PC's resources for illegal activities.
Blocking various Windows security programs, including the Windows Firewall and Windows Security Center. Any application that tries to analyze Trojan win32:sirefef-sm while the Trojan is open may also be forced to crash.

Vanquishing Trojan win32:sirefef-sm Before Things Get Even Worse Than They Already Are

Since Trojan win32:sirefef-sm and other Sirefef Trojans are noted for their tendencies to select random Windows .dll files and replace them with themselves, you shouldn't try to delete Trojan win32:sirefef-sm or detect Trojan win32:sirefef-sm by yourself – this can lead to additional damage to your operating system. Trojan win32:sirefef-sm and its relatives will launch with Windows and may not show symptoms of their attacks, but Trojan win32:sirefef-sm should be considered to be open until you've used suitable security programs to determine otherwise.

Along with all of the attacks listed earlier, Trojan win32:sirefef-sm may also be used to install other types of hazardous software or control your computer from a remote server. SpywareRemove.com malware analysts accordingly recommend that you delete Trojan win32:sirefef-sm ASAP even if this requires you to restore Windows partially from backups or re-download corrupted system components. Non-Windows operating systems, thankfully, are unable to be infected by Trojan win32:sirefef-sm or other Sirefef Trojans at the time of this writing.

Trojan win32:sirefef-sm

Threat Metric

Trojan win32:sirefef-sm: a Helping Hand to Unscrew Your Computer's Security

Vanquishing Trojan win32:sirefef-sm Before Things Get Even Worse Than They Already Are

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