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Danger level 7
Type: Trojans
Common infection symptoms:
  • Connects to the internet without permission
  • Installs itself without permissions
  • Slow Computer
  • Slow internet connection
  • System crashes


Trojan:Win64/Sirefef.U is not a simple infection, which you will be able to remove within seconds after its infiltration. In fact, you might not even realize that this devious application is active inside your operating Windows system, since it does not present an interface, and most of its malignant processes can be lost in between the running of authentic system’s operations. The devious program may also be recorded by various alias names, such as Win64/Sirefef.W, and could be followed by a number of dangerous components, allowing schemers to act as secretly as possible. If you do not remove Trojan:Win64/Sirefef.U from the operating Windows system, the consequences could be highly detrimental, as cyber crooks could be enabled to steal and utilize your private data (passwords, usernames, banking info, social security numbers, etc.). If you do not want this happening, and you wish to delete the devious backdoor Trojan from your personal computer, keep reading to find out more.

Trojan:Win64/Sirefef.U is an upgrade version of Win32/Sirefef family infection’s, which were targeted at Windows systems running on 32bit processors, and this backdoor Trojan has the ability to create cracks and loopholes (security backdoors) for further infections to get inside a targeted computer. The latent infection has been active since March of 2012, and is composed of numerous dynamic link library files, with randomly generated names, including 0074b1b4.exe, 8cac82a0-5016.exe, s716mdm.dll, irenum.dll, dmserver.dll, imagedrv.dll, ino_flpy.dll, and others. All of these files are meant to alleviate other infections’ infiltration, which could potentially remove access to certain tools, aggravating Trojan:Win64/Sirefef.U removal, modify system’s components, compromise the registry, delete files, terminate “vital” processes, and cause other damage. One of the most common Trojan’s followers is such WinWebSec family rogues as Live Security Platinum and Smart Fortress 2012. These fictitious antispywares are meant to lure targeted Windows’ owners into spending their money on fictitious, malware removal software license. Without a doubt, these tools cannot detect or delete dangerous infections, and this trick is produced to gather illicit profits. If you notice the below notifications popping up on your screen, it is possible that both WinWebSec and Trojan:Win64/Sirefef.U have invaded your system.

Application cannot be executed. The file rdpclip.exe is infected. Please active your antivirus software.

Security Monitor: WARNING!
Attention! System detected a potential hazard (TrojanSPM/LX) on your computer that may infect executable files. Your private information and PC safety is at risk.
To get rid of unwanted spyware and keep your computer safe you need to update your current security software.
Click Yes to download official intrusion detection system (IDS software).

To disable these notifications, remove rogue software and other malicious infections, you first and foremost need to delete Trojan:Win64/Sirefef.U. This backdoor Trojan can be hidden from manual removal operations by the treacherous rootkit technique, so you need to acquire legitimate software to remove the obnoxious infection from your system automatically. This software will guard your private data and all security backdoors will be fixed, so that no other malware could invade.

Download Spyware Removal Tool to Remove* Trojan:Win64/Sirefef.U
  • Quick & tested solution for Trojan:Win64/Sirefef.U removal.
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How to manually remove Trojan:Win64/Sirefef.U

Files associated with Trojan:Win64/Sirefef.U infection:


Trojan:Win64/Sirefef.U DLL's to remove:


Trojan:Win64/Sirefef.U processes to kill:


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