Threat Database Trojans Trojan.Sefnit.AJ

Trojan.Sefnit.AJ

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 196
First Seen: January 1, 2012
OS(es) Affected: Windows

The detection of Trojan.Sefnit.AJ on your system indicates a potential security threat that requires immediate attention. This detection name suggests a type of malicious software, but without further information, it's essential to understand the general characteristics of such threats and take appropriate steps to remove them. In this report, we will provide an overview of the threat, its operating methods, symptoms of infection, and guidance on how to remove it from your system.

What Is Trojan.Sefnit.AJ?

Trojan.Sefnit.AJ is identified as a Trojan-type threat, which typically refers to a broad category of malware that disguises itself as legitimate software to gain unauthorized access to a computer system. Trojans can be used for various malicious purposes, including data theft, spyware, ransomware, or as a backdoor for other malware. The specific capabilities and intentions of Trojan.Sefnit.AJ cannot be determined without more detailed analysis, but understanding its classification helps in approaching its removal and system recovery.

How Trojan.Sefnit.AJ Operates

Trojans like Trojan.Sefnit.AJ usually operate by deceiving users into installing them, often through phishing emails, infected software downloads, or exploited vulnerabilities in operating systems or applications. Once installed, they can create backdoors, allowing remote access to the attacker, who can then use the infected system for malicious activities. These activities might include stealing sensitive information, using the system as part of a botnet for distributed denial-of-service (DDoS) attacks, or spreading other malware.

Symptoms of Infection

Symptoms of a Trojan infection can vary widely depending on the specific malware's purpose and functionality. Common indicators include unusual system behavior, such as unexpected pop-ups, slow performance, unfamiliar programs or icons, and changes in browser settings. Users might also notice that their personal files are encrypted and held for ransom, or they might receive notifications about suspicious activity from their bank or other online services. Since Trojans can be designed for stealth, some infections might not exhibit noticeable symptoms, making regular system checks and updates crucial.

How to Remove Trojan.Sefnit.AJ

  1. Enter Safe Mode with Networking to limit the malware's ability to interfere with the removal process. This mode allows you to use the internet to download necessary tools while disabling most background programs.
  2. Download and run a full scan with a reputable anti-malware tool, such as SpyHunter. Ensure the tool is updated to the latest version to maximize its effectiveness against the latest threats.
  3. Uninstall suspicious programs that you do not recognize or that were installed around the time the malware was detected. Be cautious and only remove programs you are certain are not necessary for your system's operation.
  4. Reset your browsers (Chrome, Firefox, Edge, etc.) to their default settings. This step can help remove any malicious extensions or settings changes made by the Trojan.
  5. Reboot your system and perform another scan with your anti-malware tool to ensure that the threat has been fully removed. Repeat this process until no threats are detected.

Conclusion

The removal of Trojan.Sefnit.AJ requires careful and methodical steps to ensure that the malware is completely eradicated from your system. It's also crucial to adopt preventive measures, such as keeping your operating system and software up to date, using strong antivirus software, avoiding suspicious downloads, and being cautious with email attachments and links. By understanding how Trojans operate and taking proactive steps, you can significantly reduce the risk of future infections and protect your digital assets.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
Panda Trj/Genetic.gen
Comodo TrojWare.Win32.Sefnit.IC
BitDefender Gen:Variant.Kazy.112199
Kaspersky Trojan.Win32.Agent2.fikx
Kaspersky Trojan.Win32.Agent.snkw
Symantec WS.Reputation.1
Kaspersky Trojan.Win32.Agent.rovo
F-Secure Gen:Variant.Kazy.51621
Kaspersky Trojan.Win32.Agent.scdh
Kaspersky Trojan.Win32.Agent2.estd
Fortinet W32/Sefnit.CDA!tr
Antiy-AVL Trojan/Win32.Agent.gen
McAfee-GW-Edition Heuristic.BehavesLike.Win32.Suspicious.H
Sophos Mal/Sefnit-D
Kaspersky Trojan.Win32.Agent.reyf

File System Details

Trojan.Sefnit.AJ may create the following file(s):
# File Name MD5 Detections
1. CRLMappnp.dll eb95ee1c8ac5334e18de651deb881153 41
2. dbUserClock.dll 3385245058281d37d0fd2588cb9fc525 29
3. nsMouselib.dll fea355eb465dd3a0913fa799a2ab6278 25
4. acxMouseMusic.dll 43857ee071e92100cefff49dd56f8926 20
5. CatDBGLaudio.dll e54939a0890e8a195ec6bccd67c6f994 16
6. compatmapUI.dll 1cf0ff198a9bf9539a7401480fc7b1f4 11
7. smiPadIde.dll 1d658055cea5b74d197fd00a08d76e7c 11
8. i18Mobileserv.dll 495ac29174d98d41cc24ac04d9e450f9 7
9. mciCommsAgent.dll 5e4b653e6c0eee09c2d11061857a9e2b 7
10. d3dMouseARM.dll 8d0c08d6894730f5efa533fafa15a804 7
11. WdMapNetM.dll d190aefc5faa5f0e10ad26992aeaa438 5
12. fxNetRpl.dll d5c2b6c90b10792cb545139f8601afc3 4
13. sysHelp64.dll 638b0ecbf43ed09c5699cfd807e10961 2
14. ClipWebInit.dll 60086ef562bd613eefde090488964b2c 1
15. userMousePlay.dll 2ab6b7e1f7b4ad21991bcf2a75b18020 1