Threat Database Trojans Trojan.Sirefef.H

Trojan.Sirefef.H

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 8
First Seen: November 11, 2011
OS(es) Affected: Windows

The detection of Trojan.Sirefef.H on your system indicates a potential security threat that requires immediate attention. This type of malware is designed to compromise the security and integrity of your computer, and it's essential to understand its nature and take steps to remove it. In this report, we will provide an overview of Trojan.Sirefef.H, its operating methods, symptoms of infection, and a step-by-step guide on how to remove it from your system.

What Is Trojan.Sirefef.H?

Trojan.Sirefef.H is a type of malicious software that can infect your computer without your knowledge or consent. The name "Trojan" refers to the fact that this malware disguises itself as a legitimate program or file, allowing it to bypass security measures and gain access to your system. Once inside, it can cause a range of problems, from stealing sensitive information to disrupting system performance.

How Trojan.Sirefef.H Operates

Trojan.Sirefef.H operates by exploiting vulnerabilities in your system's security, often through social engineering tactics or by exploiting weaknesses in software or operating systems. Once it has gained access, it can install additional malware, create backdoors, or modify system settings to allow remote access. This can lead to a range of malicious activities, including data theft, ransomware attacks, or the use of your computer as a botnet node.

Symptoms of Infection

Identifying the symptoms of a Trojan.Sirefef.H infection can be challenging, as they can vary depending on the specific goals of the malware. However, common signs of infection include slow system performance, unexpected pop-ups or ads, unfamiliar programs or icons, and changes to system settings or browser configurations. You may also notice that your computer is behaving erratically, such as crashing or freezing frequently, or that your personal data is being stolen or compromised.

How to Remove Trojan.Sirefef.H

To remove Trojan.Sirefef.H from your system, follow these steps:

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools.
  2. Download and install a reputable anti-malware tool, such as SpyHunter, and perform a full scan of your system to detect and remove all instances of the malware.
  3. Uninstall any suspicious programs or applications that may be related to the malware, and remove any associated files or folders.
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons.
  5. Reboot your computer and perform a follow-up scan to ensure that the malware has been completely removed.

It's essential to note that removing Trojan.Sirefef.H requires patience and caution, as the malware may have created additional system modifications or hidden files that need to be addressed.

Conclusion

In conclusion, the detection of Trojan.Sirefef.H on your system is a serious security threat that requires immediate attention. By understanding the nature of this malware and following the steps outlined in this report, you can remove the infection and restore your system's security and integrity. Remember to always be cautious when downloading software or clicking on links, and to keep your operating system and security software up to date to prevent future infections. If you are unsure about any aspect of the removal process, consider seeking the advice of a professional security expert to ensure the complete and safe removal of the malware.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
Panda Generic Trojan
eTrust-Vet Win32/Sirefef.B!generic
McAfee-GW-Edition Heuristic.BehavesLike.Win32.Suspicious.D
AntiVir RKIT/ZAccess.EA
Comodo TrojWare.Win32.Rootkit.Agent.KE
ClamAV Trojan.Rootkit-3108
Symantec Hacktool.Rootkit
K7AntiVirus Riskware
McAfee ZeroAccess
CAT-QuickHeal RootKit.ZAccess.A
Panda Suspicious file
AVG Agent_r.ASR
AhnLab-V3 Dropper/Win32.Tdss
GData Win32:Aluroot
Kaspersky Rootkit.Win32.ZAccess.k

File System Details

Trojan.Sirefef.H may create the following file(s):
# File Name MD5 Detections
1. netbt.sys 634fea099c567dd73955329f739dc726 4
2. kbdclass.sys cf357e18bbd3d9612bcb8bcf5d8f72e8 2
3. serial.sys 68a84fe8f60258e8ff17c483fe31b219 1
4. ipsec.sys d8635d974c4c279398bf4dfd66f7b787 1