Trojan.Sirefef.Ga

Posted: July 11, 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:	9/10
Infected PCs:	262

First Seen:	July 11, 2012
Last Seen:	September 29, 2022
OS(es) Affected:	Windows

Trojan.Sirefef.Ga is a component of a Sirefef or ZeroAccess rootkit infection, and, as such, is merely a single finger of an entire fist's worth of malicious software that can be attacking your PC. SpywareRemove.com malware researchers have seen PC threats from Trojan.Sirefef.Ga's family engaged in browser hijacks (similar to DNS Changer), Bitcoin currency fraud, theft of confidential information and direct attacks against multiple kinds of security software. Although infections related to Trojan.Sirefef.Ga may cause noticeable system instability, there's no guarantee of visible symptoms of Trojan.Sirefef.Ga's presence, which should be removed by anti-malware software that can also detect other Sirefef components that are also likely to be on your PC.

Picking the Threads of Trojan.Sirefef.Ga's Well-Hidden Attacks Apart

Trojan.Sirefef.Ga and associated Sirefef-based PC threats are noted for their well-developed methods for avoiding visual detection and default security features. Some, but not all Trojan.Sirefef.Ga infections may cause system slowdown, random program crashes, system reboots and other forms of instability. However, the best method of detecting Trojan.Sirefef.Ga is to have anti-malware software available for the purpose. SpywareRemove.com malware researchers have noted that previous Trojan.Sirefef.Ga attacks have been found to trigger warning messages from appropriate security software on a very frequent basis. This leads to the natural conclusion that related PC threats are reinstalling Trojan.Sirefef.Ga or reinserting Trojan.Sirefef.Ga into unrelated memory processes even after Trojan.Sirefef.Ga is deleted one or more times.

PC threats that are closely related to Trojan.Sirefef.Ga and other members of the Sirefef/ZeroAccess family include Win64. Sirefef-A and Win32. Atraps-pf. SpywareRemove.com malware experts also note that outdated security software may be at risk for not detecting Trojan.Sirefef.Ga, since 'in the wild' Trojan.Sirefef.Ga attacks have been observed occurring very recently (as of early July 2012). However, attempting to find or remove Trojan.Sirefef.Ga without software assistance is strongly discouraged, since it has a high chance of damaging your operating system.

How Trojan.Sirefef.Ga Helps to Subtly Modify Your Internet Experience

Since Trojan.Sirefef.Ga uses P2P of downloading other components to enable its attacks, the ultimate payload for a Trojan.Sirefef.Ga-related infection can vary from one instance to the next one. However, SpywareRemove.com malware research team recommends that you be prepared to defend your PC against any of the following issues if your anti-malware software detects Trojan.Sirefef.Ga:

Default Windows security programs being blocked and/or deleted. This includes the Windows Firewall, Security Center and Windows Defender.
Theft of personal information, particularly browser-transmitted information that can be used to compromise websites or bank accounts. Trojan.Sirefef.Ga may be involved in phishing attacks that redirect you to malicious sites or may steal the information as it's being transferred.
Online searches being altered to promote irrelevant or malicious sites.

Due to the nature of these attacks, SpywareRemove.com malware researchers caution that minimizing unnecessary Internet usage until Trojan.Sirefef.Ga and other components of a Sirefef infection are removed is recommended to preserve the privacy of your confidential information.

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:

C:\Qoobox\Quarantine\C\Windows\Installer\{8b78c6c4-083c-d08a-5d91-6b8b5fdd55b4}\U\00000008.@.vir

File name: 00000008.@.vir
Size: 232.96 KB (232960 bytes)
MD5: 80aebc81a5d1eb392bd7c615a779918c
Detection count: 94
Mime Type: unknown/vir
Path: C:\Qoobox\Quarantine\C\Windows\Installer\{8b78c6c4-083c-d08a-5d91-6b8b5fdd55b4}\U\00000008.@.vir
Group: Malware file
Last Updated: June 25, 2022

C:\WINDOWS\Installer\{85eb3582-2e1f-09bb-a1c8-645ce153c8c7}\L\00000008.@

File name: 00000008.@
Size: 231.93 KB (231936 bytes)
MD5: 64645e81435058738c137a67df84a5c5
Detection count: 21
Mime Type: unknown/@
Path: C:\WINDOWS\Installer\{85eb3582-2e1f-09bb-a1c8-645ce153c8c7}\L\00000008.@
Group: Malware file
Last Updated: August 26, 2022

file.rar

File name: file.rar
Size: 282.79 KB (282790 bytes)
MD5: 9b551030b7930ce6f05d54aad2173a06
Detection count: 10
Mime Type: unknown/rar
Group: Malware file
Last Updated: July 24, 2012

nx.rar

File name: nx.rar
Size: 271.7 KB (271701 bytes)
MD5: ff7654b36a8940ff8832cfb03e4dd6b9
Detection count: 9
Mime Type: unknown/rar
Group: Malware file
Last Updated: July 24, 2012