Trojan.Crypt.TskLnk

What is Trojan.Crypt.TskLnk infection?

In this article you will find concerning the definition of Trojan.Crypt.TskLnk as well as its unfavorable impact on your computer system. Such ransomware are a form of malware that is clarified by online frauds to require paying the ransom by a victim.

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Most of the instances, Trojan.Crypt.TskLnk infection will certainly instruct its victims to start funds move for the function of neutralizing the changes that the Trojan infection has actually presented to the target’s tool.

Trojan.Crypt.TskLnk Summary

These alterations can be as follows:

  • 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.
  • 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.
  • 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.

  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • 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;
  • Deletes its original binary from disk;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Creates a copy of itself;
  • 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 files situated on the victim’s hard disk — so the target can no more utilize the data. This is the typical behavior of malware known as ransomware that encrypts a victim’s files. The cybercriminal then demands a ransom from the victim to restore access to the data upon payment.
  • 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.Crypt.TskLnk

One of the most normal networks whereby Trojan.Crypt.TskLnk are injected are:

  • By ways of phishing emails;
  • As a repercussion of customer winding up on a resource that holds a harmful software program;

As soon as the Trojan is efficiently infused, it will either cipher the information on the target’s computer or stop the gadget from operating in a correct way – while likewise putting a ransom note that mentions the requirement for the victims to impact the settlement for the purpose of decrypting the papers or bring back the documents system back to the initial problem. In many circumstances, the ransom note will certainly show up when the client restarts the COMPUTER after the system has currently been damaged.

Trojan.Crypt.TskLnk distribution channels.

In various corners of the globe, Trojan.Crypt.TskLnk expands by jumps and bounds. Nonetheless, the ransom notes as well as tricks of extorting the ransom money quantity might differ depending on particular local (local) setups. The ransom notes as well as techniques of extorting the ransom money amount might vary depending on certain regional (regional) settings.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software program.

    In certain areas, the Trojans often wrongfully report having found some unlicensed applications enabled on the target’s gadget. The sharp after that requires the customer to pay the ransom.

    Faulty statements about illegal web content.

    In countries where software piracy is much less prominent, this technique is not as effective for the cyber fraudulences. Alternatively, the Trojan.Crypt.TskLnk popup alert might wrongly claim to be originating from a police establishment as well as will certainly report having situated kid porn or other prohibited information on the tool.

    Trojan.Crypt.TskLnk popup alert may falsely declare to be obtaining from a legislation enforcement establishment and will report having situated child porn or other unlawful information on the gadget. The alert will in a similar way include a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: B9C8A89D
md5: 70b5facbed045ad55c1669ce0ae1f110
name: 70B5FACBED045AD55C1669CE0AE1F110.mlw
sha1: ef3e95906b5a26b763d5b4d0b25d5c1b83563ad5
sha256: 99bf6e434ea47217742a14cc93d6709f367b7f8e5abcf57796041a939942c71c
sha512: dbb49693efc502c639c2abf82e989bf315b3bdd932d02c04cdabc02e095eb4a57ed0e73cd69531e0220d85e64550955681e1ccdf4eda9b36db1ac4e1fe9bc94d
ssdeep: 12288:5BikMVE9nYxrzViMOge1i7RHkON9VS38ZYuVnYnGokD:XikMVEJC1yge1ian8uTkD
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Crypt.TskLnk also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.10433
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.Sage
Cylance Unsafe
Zillya Trojan.SageCrypt.Win32.93
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/generic.ali2000010
K7GW Trojan ( 004f76a01 )
K7AntiVirus Trojan ( 004f76a01 )
ESET-NOD32 Win32/Filecoder.NHQ
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Ransomware.Sage-6995951-1
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.BrsecmonE.1
NANO-Antivirus Trojan.Win32.SageCrypt.enbxir
ViRobot Trojan.Win32.Sage.604928
MicroWorld-eScan Trojan.BrsecmonE.1
Tencent Malware.Win32.Gencirc.10ba48f6
Ad-Aware Trojan.BrsecmonE.1
Sophos Mal/Generic-S
Comodo Malware@#10ncwsgr4q6k8
BitDefenderTheta Gen:NN.ZexaF.34628.KKX@a4hHEPgi
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_MILICRY.F117CR
McAfee-GW-Edition BehavesLike.Win32.Generic.hh
FireEye Generic.mg.70b5facbed045ad5
Emsisoft Trojan.BrsecmonE.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.SageCrypt.bj
Avira HEUR/AGEN.1115428
eGambit Unsafe.AI_Score_99%
Microsoft Ransom:Win32/Milicry
AegisLab Trojan.Win32.Generic.4!c
GData Trojan.BrsecmonE.1
AhnLab-V3 Trojan/Win32.SageCrypt.C1878315
Acronis suspicious
McAfee GenericR-JPY!70B5FACBED04
MAX malware (ai score=100)
VBA32 Hoax.SageCrypt
Malwarebytes Trojan.Crypt.TskLnk
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_MILICRY.F117CR
Rising Ransom.Milicry!8.A2F2 (CLOUD)
Yandex Trojan.GenAsa!SJlKe/PJkjs
Ikarus Trojan.Win32.Filecoder
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Generic.AC.3E87D3
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Trojan.380

How to remove Trojan.Crypt.TskLnk virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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.Crypt.TskLnk 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:

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If the guide doesn’t help you to remove Trojan.Crypt.TskLnk 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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