Threat Database Trojans Trojan.Sefnit.J

Trojan.Sefnit.J

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 250
First Seen: February 28, 2011
Last Seen: August 17, 2022
OS(es) Affected: Windows

The detection of Trojan.Sefnit.J on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malicious software, but without more specific information, it's crucial to understand the general characteristics of such threats and how to mitigate them. Trojans are known for their ability to disguise themselves as legitimate programs, making them particularly dangerous as they can lead to unauthorized access, data theft, and further malware infections.

What Is Trojan.Sefnit.J?

Trojan.Sefnit.J, as indicated by its detection name, is likely a variant of Trojan malware. Trojans are malicious programs that can cause significant harm to computer systems. They are designed to allow unauthorized access to the victim's system, which can lead to data theft, system crashes, and the installation of additional malware. The name "Trojan.Sefnit.J" itself does not directly imply a specific malware family without further context, but it suggests a type of threat that should be taken seriously.

How Trojan.Sefnit.J Operates

Trojan malware, including potential variants like Trojan.Sefnit.J, typically operates by deceiving users into installing them. This can happen through various means, such as downloading software from untrusted sources, opening malicious email attachments, or clicking on links to compromised websites. Once installed, Trojans can create backdoors, allowing hackers to access the system remotely. They can also steal sensitive information, disrupt system operation, and install additional malware.

Symptoms of Infection

Symptoms of a Trojan infection can vary widely but may include slow system performance, frequent crashes, and unusual network activity. Users might also notice new, unfamiliar programs or icons on their system, changes to their homepage or search engine, and an increase in pop-up ads. In some cases, there may be no noticeable symptoms at all, making regular system scans crucial for detection.

  • Unexplained changes to system settings or files
  • Appearance of unknown programs or toolbars
  • Increased pop-up advertisements
  • Slow system performance or frequent crashes

How to Remove Trojan.Sefnit.J

  1. Enter Safe Mode with Networking: This will help prevent the malware from spreading or interfering with the removal process. The steps to enter Safe Mode can vary depending on your operating system version.
  2. Perform a Full Scan with a Reputable Tool: Use an anti-malware tool, such as SpyHunter, to scan your system thoroughly. Ensure the tool is updated to the latest version for the best detection and removal capabilities.
  3. Uninstall Suspicious Programs: Go through your installed programs and remove any that are unfamiliar or were installed around the time the malware was detected.
  4. Reset Browsers: Resetting browsers like Chrome, Firefox, or Edge to their default settings can help remove any malicious extensions or settings changes made by the malware.
  5. Reboot and Re-scan: After removal, reboot your system and perform another full scan to ensure all traces of the malware have been removed.

Conclusion

Dealing with a Trojan infection like Trojan.Sefnit.J requires careful and immediate action to prevent further damage. By understanding how Trojans operate and following the steps to remove them, users can protect their systems and data. It's also crucial to adopt preventive measures, such as using reputable antivirus software, avoiding suspicious downloads, and keeping operating systems and software up to date. Regular system scans and backups can also help in early detection and mitigation of malware infections.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
AVG Generic23.BDUV
ClamAV Trojan.Sefnit-465
Avast Win32:MalOb-FH [Cryp]
Symantec Trojan.Sefnit!gen2
AVG Generic23.ABYJ
Fortinet W32/Sefnit.OIY!tr
AVG Cryptic.CQB
Antiy-AVL Trojan/win32.agent.gen
AntiVir TR/Sefnit.J.2
Kaspersky Trojan.Win32.Sefnit.oiy
Avast Win32:MalOb-FH
NOD32 a variant of Win32/Sefnit.BA
McAfee Generic.dx!zjd
AVG Generic21.BYEU
AntiVir TR/Crypt.XPACK.Gen2

File System Details

Trojan.Sefnit.J may create the following file(s):
# File Name MD5 Detections
1. SystemcfgEnum.dll 66a2428e25e29a607bef474064f26dac 169
2. eventAuthenticationTime.dll 1ee0e5858647bffd2ee63dba70444655 18
3. New Text Document.exe a86a6c5457c690a71d7f53b73a3065a4 15
4. mciobjTray.dll 73c3e29fd66475f40e1f535a08f92884 13
5. mciNetcdrom.dll a987c9ec08304531545e6534626481d6 6
6. armkpqujfdi.exe 9861cbaffb30190f2e845b5ff36bf1f1 4
7. DesktopCommsVdm.dll cc5ab19de0a8c13c9a9ea0af0af57569 3
8. YLxpuhh.cpl 2505974e3380cf552be3cbe63360904e 3
9. isaobj3xx.dll 44507f56b0243da4722485598a71e938 2
10. appmapNetM.dll f870e268b37df24d38fadfcc0e52f749 1
11. rasMapmon.dll 44b54a2b71083a8db14c734c6af0c098 1
12. CvtWIlib.dll 21439310d8a30c7e8dcac0253b66ee8a 1
13. iqEtsAV.cpl 6ce3f4a13eb907e757349be1eaedc4f8 1