Win32:Sirefef-LL [Trj] removal instruction

The Win32:Sirefef-LL [Trj] is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

What Win32:Sirefef-LL [Trj] virus can do?

• Behavioural detection: Executable code extraction – unpacking
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• Authenticode signature is invalid
• Behavioural detection: Injection (inter-process)
• CAPE detected the embedded win api malware family
• Attempts to disable Windows Auto Updates
• Anomalous binary characteristics
• Attempts to modify Explorer settings to prevent hidden files from being displayed
• Yara detections observed in process dumps, payloads or dropped files

How to determine Win32:Sirefef-LL [Trj]?

File Info:
name: 8CA66901FBBA3F0586D2.mlwpath: /opt/CAPEv2/storage/binaries/18546ba75ee831567982fd938878a4750258ee98de0a19d436653aefc2b74010crc32: 8AEE3D86md5: 8ca66901fbba3f0586d2abd4a0b97720sha1: 0d647b269ef290e940fa74cddbb092c4528b4a01sha256: 18546ba75ee831567982fd938878a4750258ee98de0a19d436653aefc2b74010sha512: 59aefb2d12f7e3b8bc9e40b6b002c59694b65463b7cb5df0e94f23f289a7fc8bf15cf4cbc6b5b98de634c56bb95fcceae9209ac42f601257189773ea6b373ff9ssdeep: 6144:wkmJtCNngeO+cwjfTfGHN1RWrOy9uJV10BK+baPe3ObUrlBXvgd7Vc7Ty:wkXNngeO+cwjfTfGHN1Ax9uJV10BK+b0type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T13F14C52EA360973AF452C6F51C6E4394042DAD3629C4E42BFBC26B5976F19F3D221363sha3_384: b950420df5487bd69a727c6a97e33a1c4f02716573edc4497796f7755543c7e39794e084c052c8b330302aa4dd4beaf4ep_bytes: 68543c4000e8eeffffff000000000000timestamp: 2012-02-01 06:08:36
Version Info:
Translation: 0x0409 0x04b0ProductName: WLdfyjFileVersion: 1.00ProductVersion: 1.00InternalName: FiSiuAOriginalFilename: FiSiuA.exe

Win32:Sirefef-LL [Trj] also known as:

How to remove Win32:Sirefef-LL [Trj]?

• Download and install GridinSoft Anti-Malware.
• Open GridinSoft Anti-Malware and perform a “Standard scan“.
• “Move to quarantine” all items.
• Open “Tools” tab – Press “Reset Browser Settings“.
• Select proper browser and options – Click “Reset”.
• Restart your computer.