Trojan:Win32/RYUK.DSK!MTB

What is Trojan:Win32/RYUK.DSK!MTB infection?

In this article you will certainly find about the definition of Trojan:Win32/RYUK.DSK!MTB and also its unfavorable effect on your computer. Such ransomware are a form of malware that is clarified by on the internet fraudulences to require paying the ransom by a target.

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In the majority of the cases, Trojan:Win32/RYUK.DSK!MTB infection will instruct its sufferers to start funds move for the function of counteracting the modifications that the Trojan infection has introduced to the sufferer’s tool.

Trojan:Win32/RYUK.DSK!MTB Summary

These alterations can be as complies with:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Injection (inter-process);
  • Injection with CreateRemoteThread in a remote process;
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • Mimics the system’s user agent string for its own requests;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Unconventionial language used in binary resources: Faeroese;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Detects Sandboxie through the presence of a library;
  • Detects the presence of Wine emulator via function name;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Attempts to identify installed analysis tools by a known file location;
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Detects the presence of Wine emulator via registry key;
  • Detects Sandboxie using a known mutex;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Checks for a known DeepFreeze Frozen State Mutex;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the sufferer’s hard disk drive — so the sufferer can no more utilize the information;
  • Preventing normal access to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Trojan:Win32/RYUK.DSK!MTB

One of the most normal channels where Trojan:Win32/RYUK.DSK!MTB Ransomware Trojans are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of individual ending up on a source that organizes a harmful software application;

As quickly as the Trojan is effectively infused, it will either cipher the information on the sufferer’s computer or protect against the device from operating in an appropriate way – while also positioning a ransom money note that discusses the requirement for the sufferers to effect the payment for the objective of decrypting the papers or restoring the documents system back to the preliminary problem. In many circumstances, the ransom note will certainly turn up when the customer restarts the COMPUTER after the system has already been damaged.

Trojan:Win32/RYUK.DSK!MTB circulation channels.

In different edges of the world, Trojan:Win32/RYUK.DSK!MTB grows by jumps as well as bounds. However, the ransom notes and also tricks of extorting the ransom amount might differ depending upon specific regional (regional) settings. The ransom money notes as well as techniques of obtaining the ransom money amount might differ depending on specific local (regional) setups.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software program.

    In specific areas, the Trojans commonly wrongfully report having actually discovered some unlicensed applications enabled on the victim’s device. The sharp after that requires the customer to pay the ransom money.

    Faulty statements about unlawful content.

    In countries where software application piracy is much less popular, this technique is not as efficient for the cyber scams. Additionally, the Trojan:Win32/RYUK.DSK!MTB popup alert may wrongly assert to be deriving from a law enforcement organization as well as will report having situated kid pornography or other prohibited information on the gadget.

    Trojan:Win32/RYUK.DSK!MTB popup alert might incorrectly declare to be obtaining from a legislation enforcement establishment and will report having situated youngster porn or other prohibited information on the device. The alert will in a similar way contain a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 3AF66488
md5: 3a87766b1689354349eaa5fcccb431f1
name: 3A87766B1689354349EAA5FCCCB431F1.mlw
sha1: 419eefcccd91b02c3535b8b04ce2113ae28d8b12
sha256: 7d0105d87d5b472ff34ab964f00e05d4a4a446c09c73146f3f3e9ab6bc653889
sha512: b51e73faa658ce7432f8bb0fe8f1a0d0644fca1fff4cd68eb551e95ee6201621da29363ae167058379af76b92b7521fb28a0b02f49930ad0699124fbe30ddf55
ssdeep: 3072:Yl5nUsg1ecyOZUnpfWg+ReEFK2gq/FyCUUfIdyktANC2TJMI496hTZ:Ybn0xBZngQK2gMFyHUfukaxcT
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/RYUK.DSK!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0053a01e1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24384
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Chapak.ZZ5
ALYac Gen:Heur.Mint.Titirez.muW@peQ@EOgG
Cylance Unsafe
Zillya Trojan.GenericKD.Win32.137963
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba TrojanSpy:Win32/GandCrab.a8dc169a
K7GW Trojan ( 0053a01e1 )
Cybereason malicious.b16893
Cyren W32/Gandcrab.GZWJ-2396
Symantec Packed.Generic.525
ESET-NOD32 Win32/Spy.Zbot.ADC
APEX Malicious
Avast FileRepMalware
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Heur.Mint.Titirez.muW@peQ@EOgG
NANO-Antivirus Trojan.Win32.Kryptik.fggcut
MicroWorld-eScan Gen:Heur.Mint.Titirez.muW@peQ@EOgG
Tencent Win32.Trojan.Generic.Llrj
Ad-Aware Gen:Heur.Mint.Titirez.muW@peQ@EOgG
Sophos ML/PE-A
Comodo Application.Win32.Dlhelper.GJ@8137f9
BitDefenderTheta Gen:NN.ZexaF.34608.muW@aeQ@EOgG
TrendMicro Ransom.Win32.RYUK.SMB
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.3a87766b16893543
Emsisoft Gen:Heur.Mint.Titirez.muW@peQ@EOgG (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.PSW.Coins.apf
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1106547
Microsoft Trojan:Win32/RYUK.DSK!MTB
Arcabit Trojan.Mint.Titirez.EAF06F
AegisLab Trojan.Win32.Panda.l!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Heur.Mint.Titirez.muW@peQ@EOgG
AhnLab-V3 Win-Trojan/Gandcrab04.Exp
Acronis suspicious
McAfee Packed-FKD!3A87766B1689
MAX malware (ai score=83)
VBA32 TrojanRansom.GandCrypt
Malwarebytes MachineLearning/Anomalous.95%
Panda Trj/CI.A
TrendMicro-HouseCall Ransom.Win32.RYUK.SMB
Rising Trojan.Fuerboos!8.EFC8 (CLOUD)
Yandex Trojan.GenAsa!1BFY6JBbLLU
Ikarus Trojan.Win32.Danabot
eGambit Unsafe.AI_Score_99%
Fortinet W32/Generic.AP.1D450C!tr
AVG FileRepMalware
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Spy.5ac

How to remove Trojan:Win32/RYUK.DSK!MTB virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan:Win32/RYUK.DSK!MTB files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/RYUK.DSK!MTB you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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