Trojan:Win32/Sirefef.V removal tips

The Trojan:Win32/Sirefef.V 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 Trojan:Win32/Sirefef.V virus can do?

• Behavioural detection: Executable code extraction – unpacking
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• The binary contains an unknown PE section name indicative of packing
• The binary likely contains encrypted or compressed data.
• Uses Windows utilities to enumerate running processes
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• Behavioural detection: Injection (Process Hollowing)
• Behavioural detection: Injection (inter-process)
• Behavioural detection: Injection with CreateRemoteThread in a remote process
• Checks for the presence of known windows from debuggers and forensic tools
• Attempts to identify installed analysis tools by a known file location
• Detects Bochs through the presence of a registry key
• Checks the presence of disk drives in the registry, possibly for anti-virtualization
• Attempts to modify proxy settings
• CAPE detected injection into a browser process, likely for Man-In-Browser (MITB) infostealing
• Attempts to disable Windows Auto Updates
• Collects information to fingerprint the system
• Anomalous binary characteristics
• Attempts to modify Explorer settings to prevent hidden files from being displayed
• Uses suspicious command line tools or Windows utilities

How to determine Trojan:Win32/Sirefef.V?

File Info:
name: C74967276A4A5422A8C5.mlwpath: /opt/CAPEv2/storage/binaries/265cb8538f5bb6ece5fe81d59460919bd0f482c531998b37697b88f83e7bb69dcrc32: 5076E736md5: c74967276a4a5422a8c5d1832898e0c6sha1: 0ac8bb00a342fc12980fc8cabe0d457052ef8d08sha256: 265cb8538f5bb6ece5fe81d59460919bd0f482c531998b37697b88f83e7bb69dsha512: 4605ddacb01b0d3a482a49de4c25b3dd5eac8645ea5d98abe772266ed7b27238bd329e806d3948f5d17a7bf4df32ff101f273b5afd018e058608564827bdd8c1ssdeep: 12288:jF5GA6wigctwxaJOri8KuMhEAF/Lc0CTbkwnj3Zz:p5KwTIzJSPK/hHjXoBj3Zztype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T11AB41213FA888137D644C9F1097C0AF5282B5E2418CABE876265FE941DB1A6375F933Fsha3_384: e59fe4c0de2165f3bd022349e9469cfded92af96f6712716b94a37cd032bb089d5958f9b632e810069f1334eb0f4b8ccep_bytes: 68601b4000e8f0ffffff000048000000timestamp: 2012-01-17 16:26:25
Version Info:
0: [No Data]

Trojan:Win32/Sirefef.V also known as:

How to remove Trojan:Win32/Sirefef.V?

• 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.