Backdoor.Win32.Tofsee.cbuk (file analysis)

The Backdoor.Win32.Tofsee.cbuk 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 Backdoor.Win32.Tofsee.cbuk virus can do?

• SetUnhandledExceptionFilter detected (possible anti-debug)
• Behavioural detection: Executable code extraction – unpacking
• Executed a command line with /C or /R argument to terminate command shell on completion which can be used to hide execution
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Dynamic (imported) function loading detected
• Reads data out of its own binary image
• A process created a hidden window
• CAPE extracted potentially suspicious content
• Unconventionial language used in binary resources: Slovak
• 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
• Enumerates services, possibly for anti-virtualization
• CAPE detected the Tofsee malware family
• Uses suspicious command line tools or Windows utilities

How to determine Backdoor.Win32.Tofsee.cbuk?

File Info:
name: 4120EE748EACD7F750BF.mlwpath: /opt/CAPEv2/storage/binaries/a5c617826c27b6619013474537413dd3f300ec7aa672bac8d78325724de7489dcrc32: DA959878md5: 4120ee748eacd7f750bf8df7cd5108fcsha1: 9304fece8eb8dbc8fa2403512f4d162297c53befsha256: a5c617826c27b6619013474537413dd3f300ec7aa672bac8d78325724de7489dsha512: bd3ccb7a2fd87db63d794ce18b97164568ab9851e9080cd1e326d48098428177b4082ca7062be96b9e0f3b1a98414459e681be1e9169c717ea3d93be749b1f1dssdeep: 6144:A18SP5QTaqm7ZGkQEivz3sS6JAOqTuBTQalcHDGKC:A18ASTaqKceJ6fa+H1Ctype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1E554BF1179E68433D1B3293019F4A7716A7EBD710A348A6F67D84B6E4F742D0AA31F23sha3_384: e5e3a4918d90f38ab77687853728ffcbc39115266f8117e4dd6de31884b91743707ed36d6cfde6fae50e120985d87ac4ep_bytes: e81f060000e98efeffff3b0d70004400timestamp: 2018-09-02 02:32:39
Version Info:
0: [No Data]

Backdoor.Win32.Tofsee.cbuk also known as:

How to remove Backdoor.Win32.Tofsee.cbuk?

• 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.