Threat Database Trojans Trojan.Dropper.Sirefef

Trojan.Dropper.Sirefef

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 23
First Seen: August 8, 2012
OS(es) Affected: Windows

The detection of Trojan.Dropper.Sirefef 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 how to remove it effectively.

What Is Trojan.Dropper.Sirefef?

Trojan.Dropper.Sirefef is a type of Trojan horse malware that is capable of downloading and installing additional malicious components on an infected computer. The term "Trojan" refers to the fact that this malware disguises itself as a legitimate program or file, allowing it to bypass security defenses and gain unauthorized access to the system. The "Dropper" part of the name indicates that this malware is designed to drop or install additional malware components, which can lead to further system compromise.

How Trojan.Dropper.Sirefef Operates

Trojan.Dropper.Sirefef typically operates by exploiting vulnerabilities in software or using social engineering tactics to trick users into installing the malware. Once installed, it can connect to remote servers to download and install additional malicious components, such as keyloggers, ransomware, or other types of malware. This malware can also modify system settings, disable security software, and create backdoors for remote access, allowing attackers to control the infected computer.

Symptoms of Infection

Systems infected with Trojan.Dropper.Sirefef may exhibit a range of symptoms, including slow system performance, frequent crashes, and unusual network activity. Users may also notice unfamiliar programs or icons on their desktop, or receive unexpected pop-ups and alerts. In some cases, the malware may also cause issues with internet connectivity, or prevent certain programs from running properly.

  • Unexplained changes to system settings or configuration
  • Appearance of unfamiliar programs or files
  • Increased network activity or unusual traffic
  • System crashes or freezes
  • Pop-ups, alerts, or other unexpected messages

How to Remove Trojan.Dropper.Sirefef

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for easier removal.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system and detect any malicious components.
  3. Uninstall any suspicious programs or applications that may be related to the malware.
  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 run another full scan with your anti-malware tool to ensure that all malicious components have been removed.

Conclusion

Removing Trojan.Dropper.Sirefef from your system requires careful attention to detail and a thorough understanding of the malware's behavior. By following the steps outlined above and using reputable security tools, you can effectively remove this malware and restore your system to a safe and secure state. It's essential to remain vigilant and take proactive measures to prevent future infections, such as keeping your operating system and software up to date, using strong antivirus protection, and avoiding suspicious downloads and email attachments.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
McAfee Generic.dx!bd3x
AVG Agent_r.BDS
AhnLab-V3 Trojan/Win32.ZAccess
Antiy-AVL Virus/Win32.ZAccess.gen
AntiVir TR/Graftor.18557
Comodo TrojWare.Win32.Rootkit.ZAcces.HL
Sophos Mal/ZeroAcc-A
BitDefender Gen:Variant.Renos.37
ClamAV Trojan.Tdss-7870
Avast Win32:Aluroot [Rtk]
Symantec WS.Reputation.1
McAfee ZeroAccess.dx
Panda Suspicious file
AVG Hider.QIG
Fortinet W32/ZAccess.K!tr

File System Details

Trojan.Dropper.Sirefef may create the following file(s):
# File Name MD5 Detections
1. csc.sys 814767af5a34fc59aa4e6251d82d3b83 16
2. netbt.sys f4b434c38bff4917fce9e6bd45b703cc 2
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