Trojan:Win32/Sefnit.AC
Threat Scorecard
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Ranking: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Ranking: | 16,362 |
| Threat Level: | 90 % (High) |
| Infected Computers: | 688 |
| First Seen: | December 27, 2011 |
| Last Seen: | September 14, 2023 |
| OS(es) Affected: | Windows |
The Trojan:Win32/Sefnit.AC Trojan is a dangerous malware infection that is heavily involved in fake search engine scams involving browser hijackers. Trojan:Win32/Sefnit.AC first caught the attention of PC security researchers worldwide in early December of 2011. It is detected through various aliases, usually containing the string 'Sefnit' within the malware's name. ESG security researchers consider that Trojan:Win32/Sefnit.AC is a severe malware infection that endangers your privacy and your computer system's safety. It is important to make sure that your anti-malware software is fully updated in order to make sure that the presence of Trojan:Win32/Sefnit.AC is detected. In the first week of December, most reliable anti-malware programs were updated so that they may detect and remove Trojan:Win32/Sefnit.AC from an infected computer system. To protect yourself from Trojan:Win32/Sefnit.AC, ESG malware analysts recommend that your security software be updated at least until this date.
Table of Contents
How Trojan:Win32/Sefnit.AC Attacks Your Computer System
Trojan:Win32/Sefnit.AC is designed to monitor your online activity on the two most popular Internet browsers, Internet Explorer and Mozilla Firefox. This malware infection is designed to hijack the search results on popular search engines. If your computer system is showing abnormal behavior after carrying out an online search, it is possible that you are infected with Trojan:Win32/Sefnit.AC or with a similar browser hijacker. Trojan:Win32/Sefnit.AC is characterized by the presence of a file named UtilHelpSnap.dll and dangerous additions to the Windows Registry. The previously-mentioned file will typically be installed through a Trojan dropper or downloader. The Trojan dropper associated with Trojan:Win32/Sefnit.AC will usually install its payload by taking advantage of vulnerabilities in Javascript. As part of its installation routine, Trojan:Win32/Sefnit.AC makes sure that the infected computer system will load this dangerous invader whenever the computer starts up. According to PC security researchers, Trojan:Win32/Sefnit.AC will hijack search results on Google and MSN, two of the most popular search engines. Unlike Google Redirect Virus, Trojan:Win32/Sefnit.AC is not known to affect Yahoo or Bing search results as of the writing of this report. However, malware is constantly evolving, and it is probable that Trojan:Win32/Sefnit.AC will eventually affect other search engines. As its way of operating, this malware infection changes the search result links so that they will link to malicious websites designed for the express purpose of displaying advertisements.
File System Details
| # | File Name |
Detections
Detections: The number of confirmed and suspected cases of a particular threat detected on
infected computers as reported by SpyHunter.
|
|---|---|---|
| 1. | %Temp%8xkm0knw.exe | |
| 2. | %Temp%lpmu6gmn.exe | |
| 3. | %Temp%eifnz9fgm.exe | |
| 4. | %ProgramFiles%Common FilesWMWMSpeech.dll | |
| 5. | %ProgramFiles%Common FilesWM | |
| 6. | %Temp%efx9j.log |
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