Win32:CryptoWall-AJ [Cryp]

What is Win32:CryptoWall-AJ [Cryp] infection?

In this article you will locate regarding the meaning of Win32:CryptoWall-AJ [Cryp] and also its negative effect on your computer system. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom money by a sufferer.

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In the majority of the instances, Win32:CryptoWall-AJ [Cryp] ransomware will instruct its victims to launch funds transfer for the purpose of neutralizing the amendments that the Trojan infection has introduced to the sufferer’s device.

Win32:CryptoWall-AJ [Cryp] Summary

These modifications 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;
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to delete volume shadow copies;
  • Exhibits behavior characteristic of Alphacrypt/Teslacrypt ransomware;
  • 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
  • Writes a potential ransom message to disk;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a known TeslaCrypt/AlphaCrypt ransomware decryption instruction / key file.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the records found on the sufferer’s hard disk — so the target can no longer make use of the data;
  • Preventing normal access to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Win32:CryptoWall-AJ [Cryp]

One of the most common channels where Win32:CryptoWall-AJ [Cryp] are infused are:

  • By ways of phishing e-mails;
  • As a consequence of user winding up on a resource that organizes a harmful software program;

As soon as the Trojan is successfully infused, it will certainly either cipher the data on the target’s PC or protect against the gadget from operating in a proper manner – while additionally putting a ransom money note that discusses the demand for the victims to impact the settlement for the function of decrypting the files or recovering the documents system back to the first condition. In most circumstances, the ransom money note will show up when the customer reboots the COMPUTER after the system has actually already been harmed.

Win32:CryptoWall-AJ [Cryp] circulation channels.

In various edges of the globe, Win32:CryptoWall-AJ [Cryp] expands by leaps as well as bounds. Nonetheless, the ransom notes and also methods of extorting the ransom amount may vary relying on certain regional (regional) settings. The ransom notes and tricks of extorting the ransom amount may vary depending on certain neighborhood (local) setups.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software program.

    In certain locations, the Trojans frequently wrongfully report having actually detected some unlicensed applications allowed on the target’s device. The alert then demands the user to pay the ransom.

    Faulty statements concerning prohibited web content.

    In countries where software application piracy is less preferred, this approach is not as reliable for the cyber scams. Additionally, the Win32:CryptoWall-AJ [Cryp] popup alert may falsely claim to be deriving from a police institution as well as will certainly report having situated kid pornography or other prohibited information on the device.

    Win32:CryptoWall-AJ [Cryp] popup alert might incorrectly claim to be obtaining from a legislation enforcement organization as well as will certainly report having located youngster porn or other prohibited information on the device. The alert will likewise consist of a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: 509954D1
md5: 94b3f45361f9e14271e8b720dbf63b70
name: 94B3F45361F9E14271E8B720DBF63B70.mlw
sha1: 3e364de31ed1834ebe76721c36cf51c0f5e55605
sha256: a6521c20c50371370f98a223b902b9479ab151f449598e2de73df23a6ed35ee2
sha512: 0850b13d0418172f1921030a5c81c0ec57afbba50b58b5b080448d1a1e879b5f44db42c46f5462c2ba5f2cfda4ef109ef8bf46ff145e4eb641c8884b518a746c
ssdeep: 3072:H033SCEEJqKvm9DlcdSD8s17ann4hqvDgeH7+bnI/eh7f5cjDq53Xep9/ti+RYFz:ATEjMm9DHbov7g2+b7xc3aOL/o/LiatB
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Dropbox, Inc.
FileVersion: 2.10.41
CompanyName: Dropbox, Inc.
ProductName: Dropbox
ProductVersion: 2.10.41
FileDescription: Dropbox
OriginalFilename: Dropbox.exe
Translation: 0x0409 0x04b0

Win32:CryptoWall-AJ [Cryp] also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.3401
Cynet Malicious (score: 100)
CAT-QuickHeal Ransomware.Crowti.A4
ALYac Trojan.TeslaCrypt.F
Cylance Unsafe
Zillya Trojan.Bebloh.Win32.365
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Tescrypt.016072f3
K7GW Trojan ( 004da5211 )
K7AntiVirus Trojan ( 004da5211 )
Cyren W32/Agent.XL.gen!Eldorado
Symantec Packed.Generic.521
ESET-NOD32 Win32/Filecoder.TeslaCrypt.I
APEX Malicious
Avast Win32:CryptoWall-AJ [Cryp]
ClamAV Win.Dropper.TeslaCrypt-9816514-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.TeslaCrypt.F
NANO-Antivirus Trojan.Win32.Encoder.eaetak
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
MicroWorld-eScan Trojan.TeslaCrypt.F
Tencent Malware.Win32.Gencirc.10c576f7
Ad-Aware Trojan.TeslaCrypt.F
Sophos ML/PE-A + Troj/Ransom-BWK
Comodo Malware@#10hh2h4bsi3qs
BitDefenderTheta Gen:NN.ZexaF.34628.tq0@a0FrLoc
VIPRE Trojan.Win32.Generic!BT
Emsisoft Trojan.TeslaCrypt.F (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.Generic.iurl
Webroot Gen.Variant.Ransomware
Avira TR/Crypt.XPACK.Gen8
eGambit Generic.Malware
Kingsoft Win32.Troj.Generic_a.a.(kcloud)
Microsoft Ransom:Win32/Tescrypt.C
Arcabit Trojan.TeslaCrypt.F
AegisLab Trojan.Win32.Generic.4!c
GData Trojan.TeslaCrypt.F
AhnLab-V3 Trojan/Win32.Teslacrypt.C1315446
McAfee GenericR-FLY!94B3F45361F9
MAX malware (ai score=100)
VBA32 Hoax.Bitman
Panda Trj/CI.A
TrendMicro-HouseCall TROJ_CRYPTESLA_FB1203C8.UVPA
Rising Ransom.Tescrypt!8.3AF (CLOUD)
Yandex Trojan.GenAsa!/X8ZFmodN+c
Ikarus Backdoor.Win32.Ruskill
Fortinet W32/Kryptik.EKDN!tr
AVG Win32:CryptoWall-AJ [Cryp]
Qihoo-360 Win32/Ransom.Tescrypt.HykCEpsA

How to remove Win32:CryptoWall-AJ [Cryp] 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 Win32:CryptoWall-AJ [Cryp] 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 Win32:CryptoWall-AJ [Cryp] you can always ask me in the comments for getting help.

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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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