What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the Backdoor:Win32/Tofsee.MAK!MTB malware detection usually means that your PC is in big danger. This computer virus can correctly be named as ransomware – virus which encrypts your files and asks you to pay for their decryption. Deleteing it requires some peculiar steps that must be done as soon as possible.
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Backdoor:Win32/Tofsee.MAK!MTB detection is a malware detection you can spectate in your computer. It usually appears after the provoking actions on your PC – opening the untrustworthy email, clicking the advertisement in the Web or setting up the program from suspicious resources. From the second it shows up, you have a short time to act before it starts its harmful action. And be sure – it is much better not to wait for these malicious things.

What is Backdoor:Win32/Tofsee.MAK!MTB virus?

Backdoor:Win32/Tofsee.MAK!MTB is ransomware-type malware. It searches for the documents on your disks, encrypts it, and then asks you to pay the ransom for getting the decryption key. Besides making your files locked, this malware additionally does a lot of damage to your system. It changes the networking settings in order to stop you from looking for the removal guidelines or downloading the antivirus. In rare cases, Backdoor:Win32/Tofsee.MAK!MTB can even prevent the setup of anti-malware programs.

Backdoor:Win32/Tofsee.MAK!MTB Summary

In summary, Backdoor:Win32/Tofsee.MAK!MTB malware activities in the infected PC are next:

  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • Behavioural detection: Executable code extraction – unpacking;
  • 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;
  • CAPE extracted potentially suspicious content;
  • Unconventionial language used in binary resources: Finnish;
  • Authenticode signature is invalid;
  • Enumerates services, possibly for anti-virtualization;
  • Encrypting the files kept on the target’s disk — so the victim cannot open these files;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of anti-virus apps

Ransomware has been a headache for the last 4 years. It is hard to realize a more harmful virus for both individual users and organizations. The algorithms utilized in Backdoor:Win32/Tofsee.MAK!MTB (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy currently exists, and possibly will exist. But that virus does not do all these horrible things immediately – it may require up to several hours to cipher all of your documents. Therefore, seeing the Backdoor:Win32/Tofsee.MAK!MTB detection is a clear signal that you need to begin the clearing procedure.

Where did I get the Backdoor:Win32/Tofsee.MAK!MTB?

Standard methods of Backdoor:Win32/Tofsee.MAK!MTB injection are typical for all other ransomware variants. Those are one-day landing websites where users are offered to download the free software, so-called bait emails and hacktools. Bait emails are a pretty modern tactic in malware distribution – you get the email that imitates some standard notifications about shipments or bank service conditions updates. Inside of the e-mail, there is a corrupted MS Office file, or a web link which leads to the exploit landing page.

Malicious email spam

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

Avoiding it looks quite simple, however, still requires tons of focus. Malware can hide in different spots, and it is better to prevent it even before it invades your PC than to rely on an anti-malware program. Basic cybersecurity awareness is just an essential item in the modern-day world, even if your interaction with a computer stays on YouTube videos. That can keep you a great deal of time and money which you would spend while trying to find a fix guide.

Backdoor:Win32/Tofsee.MAK!MTB malware technical details

File Info:

name: 7D21A9C56A33B494D419.mlw
path: /opt/CAPEv2/storage/binaries/0ec80388167bda82f8c5ec92358580aa080a0d1f729f5e74ef8f4296ab881194
crc32: 5EB2BBEA
md5: 7d21a9c56a33b494d419690c69a380c9
sha1: a3dc1b8718d04bc3a847ec2779b366f22b243371
sha256: 0ec80388167bda82f8c5ec92358580aa080a0d1f729f5e74ef8f4296ab881194
sha512: ed2c065353b8e762ccbf9d98fcc3788a61d5851cce3afeca394effbedba966a0dbf959f9f1b37fd02750b97612f8fca5971b941ddeb1b3328da5d8696956ddfd
ssdeep: 3072:hWgJ8fOL35NZqcI5Khfp4thS5OQeiEgjfCPXIsxkgaBChXHXy3:hWgOOL3HZZhRwcUQe8TCPX1igaQ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1E454BE10FA90C872C4810E7C9425CBE15A3FBD715A649547F7A8BBAF2F322E06376356
sha3_384: 0b3eaea6c58ed75da4f312a1aa610a215b3eff551902b09c3dababc9d16b0965a2ec3f8b6fcbc5ada3b652314a24e00a
ep_bytes: e863430000e979feffff8bff51c70130
timestamp: 2021-05-10 19:21:31

Version Info:

InternationalName: pomgveoci.iwe
Copyright: Copyrighz (C) 2021, fudkorta
Translations: 0x0127 0x010f

Backdoor:Win32/Tofsee.MAK!MTB also known as:

Elasticmalicious (high confidence)
CrowdStrikewin/malicious_confidence_100% (D)
K7GWTrojan ( 0053d5971 )
K7AntiVirusTrojan ( 0053d5971 )
ESET-NOD32a variant of Win32/Kryptik.HOGO
AvastWin32:CrypterX-gen [Trj]
EmsisoftGen:Variant.Fragtor.57889 (B)
SophosML/PE-A + Mal/Agent-AWV
MAXmalware (ai score=88)
CynetMalicious (score: 100)
RisingMalware.Heuristic!ET#91% (RDMK:cmRtazrk9f1DqDg7Y0F+mLb7sBHg)
SentinelOneStatic AI – Malicious PE
AVGWin32:CrypterX-gen [Trj]

How to remove Backdoor:Win32/Tofsee.MAK!MTB?

Backdoor:Win32/Tofsee.MAK!MTB malware is extremely difficult to delete by hand. It stores its data in several locations throughout the disk, and can recover itself from one of the elements. Moreover, a number of alterations in the registry, networking configurations and Group Policies are fairly hard to locate and return to the original. It is much better to use a special tool – exactly, an anti-malware app. GridinSoft Anti-Malware will fit the best for virus elimination goals.

Why GridinSoft Anti-Malware? It is really light-weight and has its databases updated just about every hour. Furthermore, it does not have such problems and exploits as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware suitable for removing 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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