Win32:Mutex-B [Trj] removal guide

The Win32:Mutex-B [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.

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What Win32:Mutex-B [Trj] virus can do?

• Behavioural detection: Executable code extraction – unpacking
• Performs HTTP requests potentially not found in PCAP.
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• The binary contains an unknown PE section name indicative of packing
• The binary likely contains encrypted or compressed data.
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• Exhibits behavior characteristic of Alphacrypt/Teslacrypt ransomware
• Attempts to modify proxy settings
• Attempts to ensure mapped drives are available from an elevated prompt or process with UAC enabled
• Anomalous binary characteristics
• Uses suspicious command line tools or Windows utilities

How to determine Win32:Mutex-B [Trj]?

File Info:
name: 127BD95368F39AF7681E.mlw
path: /opt/CAPEv2/storage/binaries/b0f6596b28e0d1032c379593fa657c27e59b85fec3e72602b6f0312b535501d8
crc32: CF162EC3
md5: 127bd95368f39af7681ee101f04d670f
sha1: c941fc1e53b57e9b5c323065660f139f0730b8e5
sha256: b0f6596b28e0d1032c379593fa657c27e59b85fec3e72602b6f0312b535501d8
sha512: db41371fbc121f3a86440d6dd64db7cc733ab374081f0df7b4289ecbe88a8cbc1ebd9de49d8c8e45eb8ca0235e54049c48aa93eac63d8c7784ee72accc1c211d
ssdeep: 6144:QpqpF/yLKs5jiQm+FMA5na0PpdoeBTO5fOfX8oXFHch:QpWyKAW1+1aEpaAC53gF8h
type: PE32 executable (console) Intel 80386, for MS Windows
tlsh: T1AA64D0B8D6BF59F4FD186BB5D0B9D17D37044108C564932CFA902ACDB0A6AC6BB439C8
sha3_384: 72a3194b5a0c851bec028514a7ab56d9299c3db064242228861542bdd0c565665b9a6b6a2c13890fc63a67f2886405b3
ep_bytes: 8935544c4400893d584c4400891d5c4c
timestamp: 2016-03-12 22:05:03

Version Info:
CompanyName: Microsoft Corporation
FileDescription: Routing Utilities
FileVersion: 10.0.10240.16384 (th1.150709-1700)
InternalName: RTUTILS.DLL
LegalCopyright: © Microsoft Corporation. All rights reserved.
OriginalFilename: RTUTILS.DLL
ProductName: Microsoft® Windows® Operating System
ProductVersion: 10.0.10240.16384
Translation: 0x0409 0x04b0

Win32:Mutex-B [Trj] also known as:

How to remove Win32:Mutex-B [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.