Win32:Crilock-A [Trj]

Written by Robert Bailey

What is Win32:Crilock-A [Trj] infection?

In this article you will certainly locate about the meaning of Win32:Crilock-A [Trj] and also its negative influence on your computer system. Such ransomware are a type of malware that is clarified by online frauds to demand paying the ransom money by a sufferer.

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In the majority of the cases, Win32:Crilock-A [Trj] virus will certainly advise its victims to start funds move for the function of neutralizing the changes that the Trojan infection has introduced to the target’s device.

Win32:Crilock-A [Trj] Summary

These adjustments 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.
  • Mimics the system’s user agent string for its own requests;
  • 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.
  • Deletes its original binary from disk;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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;
  • Ciphering the records found on the sufferer’s disk drive — so the target can no longer make use of the data;
  • Preventing routine access to the sufferer’s workstation;
Similar behavior
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Win32:Crilock-A [Trj]

One of the most common networks where Win32:Crilock-A [Trj] Trojans are infused are:

  • By means of phishing emails;
  • As a consequence of user winding up on a resource that organizes a harmful software program;

As quickly as the Trojan is successfully injected, it will certainly either cipher the data on the sufferer’s PC or prevent the device from working in an appropriate fashion – while likewise positioning a ransom money note that mentions the need for the victims to effect the settlement for the function of decrypting the papers or recovering the data system back to the initial problem. In the majority of instances, the ransom money note will show up when the customer reboots the PC after the system has actually currently been damaged.

Win32:Crilock-A [Trj] circulation channels.

In numerous edges of the globe, Win32:Crilock-A [Trj] expands by leaps as well as bounds. Nevertheless, the ransom money notes and also methods of obtaining the ransom quantity may vary relying on specific neighborhood (local) setups. The ransom money notes and also methods of extorting the ransom quantity may vary depending on certain regional (local) setups.

Ransomware injection

For instance:

    Faulty informs about unlicensed software application.

    In specific areas, the Trojans usually wrongfully report having actually detected some unlicensed applications made it possible for on the victim’s device. The sharp after that demands the individual to pay the ransom.

    Faulty declarations regarding illegal web content.

    In nations where software application piracy is less prominent, this approach is not as efficient for the cyber frauds. Additionally, the Win32:Crilock-A [Trj] popup alert may falsely assert to be deriving from a law enforcement institution and also will report having situated child porn or various other unlawful information on the device.

    Win32:Crilock-A [Trj] popup alert might wrongly declare to be deriving from a law enforcement organization as well as will certainly report having situated child pornography or various other prohibited data on the tool. The alert will similarly consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 007F02AD
md5: 0204332754da5975b6947294b2d64c92
name: 0204332754DA5975B6947294B2D64C92.mlw
sha1: a4c60f419c5aa760db9904a59c8d79fce2636d68
sha256: 2163570f047cefc466c0ca370e56b6fbb770c4f71603b2353c1b6fd8e482ced8
sha512: 31c104a2ee02042d5dabaa910202451a15441e15eee89c6d0c4706c6c398af6ed9a2bb641707c7381836b1be9b7989b2279a3fbff959329e9b2a09919e26341e
ssdeep: 12288:owtTSWbZzmK1tl8gBVkj6VNQJsojXXKI50XZo/6N3VG:owt2WdzxfmVjXr6Zz
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32:Crilock-A [Trj] also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.Common.60D0742B
K7AntiVirus Trojan ( 004eb3aa1 )
Elastic malicious (high confidence)
DrWeb Trojan.Inject1.29510
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Crilock
ALYac Trojan.Ransom.CryptoLocker.A
Cylance Unsafe
Zillya Trojan.Blocker.Win32.11652
Sangfor Ransom.Win32.Crilock.B
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.aa335c79
K7GW Trojan ( 004eb3aa1 )
Cybereason malicious.754da5
Cyren W32/Trojan.JZJR-6808
Symantec Ransom.Cryptolock!g4
ESET-NOD32 Win32/Filecoder.BQ
Zoner Trojan.Win32.19677
APEX Malicious
Avast Win32:Crilock-A [Trj]
ClamAV Win.Trojan.Agent-1430395
Kaspersky Trojan-Ransom.Win32.Blocker.cmkv
BitDefender Trojan.GenericKD.1324664
NANO-Antivirus Trojan.Win32.Zbot.cqimhs
ViRobot Trojan.Win32.S.Ransom.766976
SUPERAntiSpyware Trojan.Agent/Gen-Crilock
MicroWorld-eScan Trojan.GenericKD.1324664
Ad-Aware Trojan.GenericKD.1324664
Sophos ML/PE-A + Troj/Ransom-ACO
Comodo Malware@#7rm5ij4hscsk
BitDefenderTheta Gen:NN.ZexaF.34692.UmW@a4paT4c
VIPRE Trojan.Win32.Zbot.i (v)
TrendMicro TROJ_CRILOCK.SMJ
McAfee-GW-Edition BehavesLike.Win32.Trojan.bh
FireEye Generic.mg.0204332754da5975
Emsisoft Trojan.GenericKD.1324664 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/Win32.crypt.a
Webroot W32.Rogue.Gen
Avira TR/Ransom.Blocker.cmkv
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.4B1F8D
Kingsoft Win32.Heur.KVMF58.hy.(kcloud)
Microsoft Ransom:Win32/Crilock.B
Arcabit Trojan.Generic.D143678
AegisLab Trojan.Win32.Blocker.j!c
GData Win32.Trojan.Agent.DRP44O
TACHYON Trojan/W32.Blocker.766976
AhnLab-V3 Trojan/Win32.Agent.R84126
McAfee Ransom-FCW
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Panda Trj/Dtcontx.H
TrendMicro-HouseCall TROJ_CRILOCK.SMJ
Rising Worm.Win32.CryptoLocker.a (CLASSIC)
Yandex Trojan.GenAsa!O4fjOEBM4Kc
Ikarus Trojan.Win32.Crilock
Fortinet W32/Blocker.CMKV!tr
AVG Win32:Crilock-A [Trj]
Paloalto generic.ml

How to remove Win32:Crilock-A [Trj] 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 Win32:Crilock-A [Trj] 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 Win32:Crilock-A [Trj] 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: http://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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