What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
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.
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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.mlw
path: /opt/CAPEv2/storage/binaries/83763ca7c5442c2aeaa22572399d0203ed1904abc44f85086939b2b0425b1d0a
crc32: C769F4A3
md5: cd29434d3bbc45a2bad9ddf6d6e86de7
sha1: 0dfcb4647c21319b7878cd3e60224f31ca924ccf
sha256: 83763ca7c5442c2aeaa22572399d0203ed1904abc44f85086939b2b0425b1d0a
sha512: 84637c9d40903aed11d9c8b057068671f5a44db173d9e08b2a5daa73667cbcc84f93d2df5d248c7b6a1b686ba9316bf75546812e8bee9b58373f3470e33c53a7
ssdeep: 24576:G0x8y5FUfffffffffffffffffffffffffffffffffffffffffffffffffffffff3:RxB5
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T15FE6B581A6F5DD26F6F70A70697542D92977FCE76835818EB0543B1B2CB22C29CB0723
sha3_384: 0b2d17291a3f55da0aad7db46497745d635a7df29e8e260b9442bc0154acb93d2a1ce91df0ce339ece0208ac3c6dcd40
ep_bytes: e8cd430000e979feffff8bff558bec81
timestamp: 2020-11-03 08:42:56

Version Info:

InternalName: peatemas
LegalCopyrighd: sharmir
Translation: 0x0169 0x0300

Backdoor.Win32.Tofsee.pef also known as:

Elasticmalicious (high confidence)
K7AntiVirusTrojan ( 005164b91 )
K7GWTrojan ( 005164b91 )
CrowdStrikewin/malicious_confidence_100% (W)
AvastWin32:MalwareX-gen [Trj]
EmsisoftTrojan.GenericKDZ.83189 (B)
SentinelOneStatic AI – Malicious PE
CynetMalicious (score: 100)
MAXmalware (ai score=89)
RisingBackdoor.Tofsee!8.1E9 (CLOUD)
AVGWin32:MalwareX-gen [Trj]

How to remove Backdoor.Win32.Tofsee.pef?

Backdoor.Win32.Tofsee.pef malware is extremely difficult to erase manually. It puts its data in several places throughout the disk, and can recover itself from one of the elements. Additionally, numerous modifications in the windows registry, networking setups and Group Policies are quite hard to locate and revert to the original. It is far better to use a specific program – exactly, an anti-malware program. GridinSoft Anti-Malware will definitely fit the most ideal for virus elimination reasons.

Why GridinSoft Anti-Malware? It is really lightweight and has its databases updated practically every hour. In addition, it does not have such problems and exploits as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware ideal for clearing away malware of any kind.

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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