Backdoor.Win32.Tofsee.pef

Seeing the Backdoor.Win32.Tofsee.pef malware detection usually means that your computer is in big danger. This computer virus can correctly be named as ransomware – virus which ciphers your files and asks you to pay for their decryption. Stopping it requires some unusual steps that must be taken as soon as possible.

Backdoor.Win32.Tofsee.pef detection is a malware detection you can spectate in your computer. It often appears after the preliminary activities on your PC – opening the dubious e-mail, clicking the advertisement in the Web or installing the program from unreliable resources. From the moment it shows up, you have a short time to take action until it begins its destructive activity. And be sure – it is much better not to wait for these harmful actions.

What is Backdoor.Win32.Tofsee.pef virus?

Backdoor.Win32.Tofsee.pef is ransomware-type malware. It looks for the documents on your disk, ciphers it, and after that asks you to pay the ransom for getting the decryption key. Besides making your files inaccessible, this virus also does a lot of harm to your system. It alters the networking settings in order to avoid you from reading the elimination articles or downloading the antivirus. In some cases, Backdoor.Win32.Tofsee.pef can even prevent the launching of anti-malware programs.

Backdoor.Win32.Tofsee.pef Summary

In total, Backdoor.Win32.Tofsee.pef malware activities 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;
  • Drops a binary and executes it;
  • Unconventionial language used in binary resources: Macedonian;
  • Authenticode signature is invalid;
  • Uses Windows utilities for basic functionality;
  • Enumerates services, possibly for anti-virtualization;
  • Behavioural detection: Injection (Process Hollowing);
  • Executed a process and injected code into it, probably while unpacking;
  • Behavioural detection: Injection (inter-process);
  • Installs itself for autorun at Windows startup;
  • Installs itself for autorun at Windows startup;
  • CAPE detected the Tofsee malware family;
  • Anomalous binary characteristics;
  • Uses suspicious command line tools or Windows utilities;
  • Encrypting the files kept on the victim’s drives — so the victim cannot use these documents;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of security tools

Ransomware has actually been a nightmare for the last 4 years. It is hard to imagine a more hazardous malware for both individual users and corporations. The algorithms used in Backdoor.Win32.Tofsee.pef (usually, 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 unpleasant things without delay – it may take up to several hours to cipher all of your documents. Therefore, seeing the Backdoor.Win32.Tofsee.pef detection is a clear signal that you have to begin the removal procedure.

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

Usual tactics of Backdoor.Win32.Tofsee.pef spreading are standard for all other ransomware variants. Those are one-day landing web pages where victims are offered to download the free program, so-called bait emails and hacktools. Bait emails are a pretty new method in malware spreading – you get the email that imitates some normal notifications about deliveries or bank service conditions shifts. Inside of the e-mail, there is a malicious MS Office file, or a web link which leads to the exploit landing site.

Malicious email spam

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

Preventing it looks fairly simple, but still requires tons of awareness. Malware can hide in various spots, and it is better to stop it even before it gets into your system than to depend on an anti-malware program. Essential cybersecurity knowledge is just an essential item in the modern-day world, even if your relationship with a computer remains on YouTube videos. That may save you a great deal of time and money which you would certainly spend while seeking a fixing guide.

Backdoor.Win32.Tofsee.pef malware technical details

File Info:

name: CD29434D3BBC45A2BAD9.mlwpath: /opt/CAPEv2/storage/binaries/83763ca7c5442c2aeaa22572399d0203ed1904abc44f85086939b2b0425b1d0acrc32: C769F4A3md5: cd29434d3bbc45a2bad9ddf6d6e86de7sha1: 0dfcb4647c21319b7878cd3e60224f31ca924ccfsha256: 83763ca7c5442c2aeaa22572399d0203ed1904abc44f85086939b2b0425b1d0asha512: 84637c9d40903aed11d9c8b057068671f5a44db173d9e08b2a5daa73667cbcc84f93d2df5d248c7b6a1b686ba9316bf75546812e8bee9b58373f3470e33c53a7ssdeep: 24576:G0x8y5FUfffffffffffffffffffffffffffffffffffffffffffffffffffffff3:RxB5type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T15FE6B581A6F5DD26F6F70A70697542D92977FCE76835818EB0543B1B2CB22C29CB0723sha3_384: 0b2d17291a3f55da0aad7db46497745d635a7df29e8e260b9442bc0154acb93d2a1ce91df0ce339ece0208ac3c6dcd40ep_bytes: e8cd430000e979feffff8bff558bec81timestamp: 2020-11-03 08:42:56

Version Info:

FileVers: 65.51.36.16ProductVersa: 7.50.25.71InternalName: peatemasLegalCopyrighd: sharmirTranslation: 0x0169 0x0300

Backdoor.Win32.Tofsee.pef also known as:

Bkav W32.AIDetect.malware2
Lionic Trojan.Win32.Tofsee.m!c
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKDZ.83189
FireEye Generic.mg.cd29434d3bbc45a2
ALYac Trojan.GenericKDZ.83189
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 005164b91 )
Alibaba Ransom:Win32/StopCrypt.40308fa3
K7GW Trojan ( 005164b91 )
CrowdStrike win/malicious_confidence_100% (W)
Cyren W32/Kryptik.GDH.gen!Eldorado
Symantec Packed.Generic.620
ESET-NOD32 Win32/Tofsee.BJ
APEX Malicious
Paloalto generic.ml
ClamAV Win.Malware.Generic-9937750-0
Kaspersky HEUR:Backdoor.Win32.Tofsee.pef
BitDefender Trojan.GenericKDZ.83189
Avast Win32:MalwareX-gen [Trj]
Tencent Win32.Trojan.Tofsee.Szbl
Ad-Aware Trojan.GenericKDZ.83189
Sophos Mal/Generic-S
DrWeb Trojan.Siggen16.38286
Zillya Trojan.Tofsee.Win32.2983
TrendMicro Ransom_StopCrypt.R002C0DB122
McAfee-GW-Edition BehavesLike.Win32.Generic.vt
Emsisoft Trojan.GenericKDZ.83189 (B)
SentinelOne Static AI – Malicious PE
GData Win32.Trojan.PSE.MS31UA
Avira TR/AD.Tofsee.brqow
Antiy-AVL Trojan/Generic.ASMalwS.351A6B0
Arcabit Trojan.Generic.D144F5
Microsoft Ransom:Win32/StopCrypt.PAS!MTB
Cynet Malicious (score: 100)
AhnLab-V3 Ransomware/Win.Stop.R468727
Acronis suspicious
McAfee Packed-GBE!CD29434D3BBC
MAX malware (ai score=89)
VBA32 Malware-Cryptor.2LA.gen
Malwarebytes Trojan.MalPack.GS
TrendMicro-HouseCall Ransom_StopCrypt.R002C0DB122
Rising Backdoor.Tofsee!8.1E9 (CLOUD)
Yandex Trojan.Tofsee!Ds4x+/yPW8k
Ikarus Trojan.Win32.Crypt
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Kryptik.HODR!tr
BitDefenderTheta Gen:NN.ZexaF.34212.@t0@aOiGK9pG
AVG Win32:MalwareX-gen [Trj]
Cybereason malicious.47c213
Panda Trj/GdSda.A

How to remove Backdoor.Win32.Tofsee.pef?

About the author

Robert Bailey

Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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