Backdoor.Win32.Tofsee.cbuk

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the Backdoor.Win32.Tofsee.cbuk malware detection usually means that your PC is in big danger. This computer virus can correctly be named as ransomware – sort of malware which encrypts your files and asks you to pay for their decryption. Stopping it requires some specific steps that must be done as soon as possible.
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Backdoor.Win32.Tofsee.cbuk detection is a virus detection you can spectate in your system. It often shows up after the provoking actions on your PC – opening the untrustworthy email messages, clicking the advertisement in the Web or mounting the program from unreliable sources. From the moment it shows up, you have a short time to take action before it starts its destructive action. And be sure – it is better not to await these malicious actions.

What is Backdoor.Win32.Tofsee.cbuk virus?

Backdoor.Win32.Tofsee.cbuk is ransomware-type malware. It looks for the documents on your disk drive, ciphers it, and then asks you to pay the ransom for getting the decryption key. Besides making your documents locked, this virus additionally does a lot of damage to your system. It alters the networking settings in order to stop you from checking out the elimination guidelines or downloading the antivirus. In some cases, Backdoor.Win32.Tofsee.cbuk can additionally block the launching of anti-malware programs.

Backdoor.Win32.Tofsee.cbuk Summary

In total, Backdoor.Win32.Tofsee.cbuk virus actions in the infected PC are next:

  • 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;
  • Ciphering the documents located on the victim’s disk drive — so the victim cannot check these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of anti-virus programs

Ransomware has been a major problem for the last 4 years. It is hard to imagine a more dangerous malware for both individual users and companies. The algorithms used in Backdoor.Win32.Tofsee.cbuk (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy already exists, and possibly will exist. However, that malware does not do all these bad things immediately – it can require up to several hours to cipher all of your documents. Therefore, seeing the Backdoor.Win32.Tofsee.cbuk detection is a clear signal that you have to start the removal procedure.

Where did I get the Backdoor.Win32.Tofsee.cbuk?

Typical ways of Backdoor.Win32.Tofsee.cbuk spreading are usual for all other ransomware variants. Those are one-day landing sites where victims are offered to download the free software, so-called bait emails and hacktools. Bait e-mails are a pretty new method in malware spreading – you get the e-mail that simulates some normal notifications about shippings or bank service conditions changes. Inside of the email, there is an infected MS Office file, or a web link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks quite easy, but still demands tons of awareness. Malware can hide in various spots, and it is better to stop it even before it invades your system than to rely upon an anti-malware program. Simple cybersecurity awareness is just an essential item in the modern-day world, even if your relationship with a PC stays on YouTube videos. That may keep you a lot of money and time which you would spend while searching for a fixing guide.

Backdoor.Win32.Tofsee.cbuk malware technical details

File Info:

name: 4120EE748EACD7F750BF.mlw
path: /opt/CAPEv2/storage/binaries/a5c617826c27b6619013474537413dd3f300ec7aa672bac8d78325724de7489d
crc32: DA959878
md5: 4120ee748eacd7f750bf8df7cd5108fc
sha1: 9304fece8eb8dbc8fa2403512f4d162297c53bef
sha256: a5c617826c27b6619013474537413dd3f300ec7aa672bac8d78325724de7489d
sha512: bd3ccb7a2fd87db63d794ce18b97164568ab9851e9080cd1e326d48098428177b4082ca7062be96b9e0f3b1a98414459e681be1e9169c717ea3d93be749b1f1d
ssdeep: 6144:A18SP5QTaqm7ZGkQEivz3sS6JAOqTuBTQalcHDGKC:A18ASTaqKceJ6fa+H1C
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1E554BF1179E68433D1B3293019F4A7716A7EBD710A348A6F67D84B6E4F742D0AA31F23
sha3_384: e5e3a4918d90f38ab77687853728ffcbc39115266f8117e4dd6de31884b91743707ed36d6cfde6fae50e120985d87ac4
ep_bytes: e81f060000e98efeffff3b0d70004400
timestamp: 2018-09-02 02:32:39

Version Info:

0: [No Data]

Backdoor.Win32.Tofsee.cbuk also known as:

BkavW32.AIDetect.malware2
LionicTrojan.Win32.Tofsee.m!c
Elasticmalicious (high confidence)
CynetMalicious (score: 100)
FireEyeGeneric.mg.4120ee748eacd7f7
CAT-QuickHealRansom.Stop.MP4
McAfeeGenericRXJF-BT!4120EE748EAC
CylanceUnsafe
SangforTrojan.Win32.Save.a
K7AntiVirusTrojan ( 005157701 )
BitDefenderTrojan.GenericKD.32756186
K7GWTrojan ( 005157701 )
CrowdStrikewin/malicious_confidence_100% (W)
VirITTrojan.Win32.Genus.IKX
CyrenW32/Kryptik.DPC.gen!Eldorado
ESET-NOD32Win32/Tofsee.BJ
APEXMalicious
Paloaltogeneric.ml
KasperskyBackdoor.Win32.Tofsee.cbuk
AlibabaMalware:Win32/km_2e956b.None
NANO-AntivirusTrojan.Win32.Encoder.gjwbkx
MicroWorld-eScanTrojan.GenericKD.32756186
AvastWin32:CoinminerX-gen [Trj]
RisingTrojan.Kryptik!1.BFC8 (KTSE)
Ad-AwareTrojan.GenericKD.32756186
EmsisoftTrojan.GenericKD.32756186 (B)
ComodoMalware@#1sk8xkoxcapbo
DrWebTrojan.Encoder.858
ZillyaTrojan.Tofsee.Win32.2150
TrendMicroTrojan.Win32.URSNIF.JAFII
McAfee-GW-EditionBehavesLike.Win32.Trojan.dh
SophosMal/Generic-R + Mal/GandCrab-G
IkarusTrojan.Win32.Tofsee
GDataWin32.Trojan.Agent.IUSLGG
JiangminTrojan.Generic.eainf
WebrootW32.Trojan.Gen
AviraTR/AD.Tofsee.owccd
MAXmalware (ai score=83)
ArcabitTrojan.Generic.D1F3D1DA
SUPERAntiSpywareTrojan.Agent/Gen-Azorult
MicrosoftTrojan:Win32/Ursnif.VDK!MTB
AhnLab-V3Trojan/Win32.MalPe.R301118
VBA32BScope.Trojan.Wacatac
ALYacTrojan.GenericKD.32756186
MalwarebytesTrojan.MalPack.GS
TrendMicro-HouseCallTrojan.Win32.URSNIF.JAFII
TencentMalware.Win32.Gencirc.114de93b
YandexTrojan.GenAsa!mWqSPTs8E4g
SentinelOneStatic AI – Suspicious PE
MaxSecureTrojan.Malware.74716491.susgen
FortinetW32/GenKryptik.DYUP!tr
BitDefenderThetaGen:NN.ZexaF.34742.ryW@aWtKe1bG
AVGWin32:CoinminerX-gen [Trj]
Cybereasonmalicious.48eacd
PandaTrj/WLT.E

How to remove Backdoor.Win32.Tofsee.cbuk?

Backdoor.Win32.Tofsee.cbuk malware is extremely hard to delete manually. It places its files in a variety of places throughout the disk, and can recover itself from one of the elements. Furthermore, various alterations in the windows registry, networking settings and Group Policies are quite hard to discover and change to the original. It is better to utilize a special app – exactly, an anti-malware tool. GridinSoft Anti-Malware will fit the most ideal for virus removal objectives.

Why GridinSoft Anti-Malware? It is pretty light-weight and has its detection databases updated just about every hour. Furthermore, it does not have such problems and weakness as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware suitable for removing malware of any form.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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