Ransom:Win32/Criakl

What is Ransom:Win32/Criakl infection?

In this article you will certainly locate about the definition of Ransom:Win32/Criakl and also its negative effect on your computer. Such ransomware are a form of malware that is clarified by online frauds to demand paying the ransom money by a target.

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In the majority of the situations, Ransom:Win32/Criakl ransomware will advise its victims to start funds move for the objective of neutralizing the amendments that the Trojan infection has introduced to the sufferer’s device.

Ransom:Win32/Criakl Summary

These alterations can be as follows:

  • Injection (inter-process);
  • 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 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.
  • 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.

  • 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.
  • Unconventionial language used in binary resources: Russian;
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Checks for the presence of known windows from debuggers and forensic tools;
  • 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
  • Checks the version of Bios, possibly for anti-virtualization;
  • Detected Armadillo packer using a known mutex;
  • Detected Armadillo packer using a known registry key;
  • 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 target’s disk drive — so the target can no longer use the data;
  • Preventing routine 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.

Ransom:Win32/Criakl

One of the most common channels where Ransom:Win32/Criakl Trojans are infused are:

  • By ways of phishing e-mails;
  • As a consequence of user ending up on a source that hosts a harmful software program;

As quickly as the Trojan is effectively injected, it will certainly either cipher the data on the target’s computer or avoid the gadget from operating in a correct fashion – while also putting a ransom note that points out the demand for the targets to impact the repayment for the function of decrypting the records or recovering the documents system back to the preliminary condition. In a lot of circumstances, the ransom note will show up when the client reboots the COMPUTER after the system has already been harmed.

Ransom:Win32/Criakl circulation networks.

In numerous corners of the globe, Ransom:Win32/Criakl expands by leaps and bounds. Nevertheless, the ransom money notes as well as techniques of obtaining the ransom money quantity might vary relying on certain regional (regional) setups. The ransom money notes and methods of obtaining the ransom money quantity might vary depending on particular local (regional) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software application.

    In certain areas, the Trojans commonly wrongfully report having found some unlicensed applications enabled on the target’s gadget. The alert then requires the individual to pay the ransom.

    Faulty statements about illegal content.

    In countries where software application piracy is less preferred, this method is not as reliable for the cyber scams. Alternatively, the Ransom:Win32/Criakl popup alert might wrongly claim to be deriving from a police organization and also will certainly report having located child pornography or various other illegal data on the device.

    Ransom:Win32/Criakl popup alert may falsely assert to be acquiring from a regulation enforcement establishment and will report having located youngster pornography or various other unlawful data on the gadget. The alert will in a similar way include a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: 15B345F5
md5: ef5798e81932e6c719416d402127d63a
name: EF5798E81932E6C719416D402127D63A.mlw
sha1: fc293e45edb8336b028d408efa0884c190d66e88
sha256: 68fc7f541a5d520469ba236b8f1ce5f34e7f59324a544f2c17f144cdc857180d
sha512: 952e01a52b6d64c72ff2c33b6f5cc8216b76ddf5ee95cce02fb32191deeba56dfaca802a51a5d2fdfbb7dfbaa3078a0caed7dd5e9a35eaf322bcf25376d35fe4
ssdeep: 49152:CXz+UjtVkmR5KNTuVhlFwpYAR7diinQb2kW+ZcSV6r:CXz+UjLktyXzgdZQb2DL/r
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: RarLab
FileDescription: WinRar 4.20 Installation
FileVersion: 4.20
Comments:
CompanyName: RarLab
Translation: 0x0409 0x04e4

Ransom:Win32/Criakl also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e3ef1 )
DrWeb Trojan.Encoder.567
McAfee Artemis!EF5798E81932
Sangfor Ransom.Win32.Cryakl.ad
Alibaba Ransom:Win32/Cryakl.d36f155b
K7GW Trojan ( 0055e3ef1 )
Cybereason malicious.81932e
Symantec ML.Attribute.HighConfidence
ESET-NOD32 multiple detections
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Cryakl.ad
BitDefender Gen:Variant.Ransom.Cryak.38
NANO-Antivirus Trojan.Win32.Encoder.crucxx
MicroWorld-eScan Gen:Variant.Ransom.Cryak.38
Tencent Win32.Trojan.Cryakl.Amvv
Sophos Mal/Generic-R
Comodo Malware@#m8rad5odiluf
BitDefenderTheta Gen:NN.ZexaF.34670.v20@a8OQKtmk
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Dropper.tc
FireEye Generic.mg.ef5798e81932e6c7
Emsisoft Gen:Variant.Ransom.Cryak.38 (B)
Jiangmin Trojan/Cryakl.aj
Avira TR/Crypt.XPACK.Gen9
eGambit Generic.Dropper
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Criakl
Arcabit Trojan.Ransom.Cryak.38
GData Gen:Variant.Ransom.Cryak.38
VBA32 Hoax.Cryakl
MAX malware (ai score=100)
Panda Trj/CI.A
Rising Ransom.Criakl!8.1B3B (CLOUD)
SentinelOne Static AI – Suspicious PE
MaxSecure Trojan-Ransom.Win32.Crypmod.zfq
Fortinet W32/Cryakl.AD!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Criakl.HwUBEpsA

How to remove Ransom:Win32/Criakl 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 Ransom:Win32/Criakl 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 Ransom:Win32/Criakl 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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