Trojan-Ransom.Win32.Cryptodef.acfx

Written by Robert Bailey

What is Trojan-Ransom.Win32.Cryptodef.acfx infection?

In this short article you will certainly discover concerning the definition of Trojan-Ransom.Win32.Cryptodef.acfx and its unfavorable influence on your computer system. Such ransomware are a type of malware that is specified by on-line fraudulences to require paying the ransom money by a target.

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In the majority of the situations, Trojan-Ransom.Win32.Cryptodef.acfx virus will advise its sufferers to initiate funds move for the function of counteracting the changes that the Trojan infection has presented to the sufferer’s gadget.

Trojan-Ransom.Win32.Cryptodef.acfx 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.
  • 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;
  • A process attempted to delay the analysis task.;
  • Deletes its original binary from disk;
  • Exhibits behavior characteristic of Cryptowall 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
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files situated on the target’s hard drive — so the target can no longer make use of the data;
  • Preventing normal access to the victim’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-Ransom.Win32.Cryptodef.acfx

One of the most typical channels whereby Trojan-Ransom.Win32.Cryptodef.acfx Trojans are injected are:

  • By means of phishing emails;
  • As a repercussion of individual winding up on a source that hosts a destructive software;

As soon as the Trojan is successfully infused, it will either cipher the data on the target’s PC or stop the gadget from working in a proper fashion – while also placing a ransom money note that points out the demand for the sufferers to impact the settlement for the purpose of decrypting the files or recovering the data system back to the preliminary condition. In many circumstances, the ransom money note will show up when the client restarts the COMPUTER after the system has actually already been harmed.

Trojan-Ransom.Win32.Cryptodef.acfx distribution networks.

In various edges of the globe, Trojan-Ransom.Win32.Cryptodef.acfx grows by jumps and also bounds. However, the ransom money notes as well as tricks of extorting the ransom money amount might differ depending on particular regional (regional) setups. The ransom notes and tricks of extorting the ransom money amount might vary depending on particular neighborhood (local) setups.

Ransomware injection

For example:

    Faulty signals regarding unlicensed software.

    In particular areas, the Trojans commonly wrongfully report having actually spotted some unlicensed applications made it possible for on the sufferer’s tool. The sharp after that demands the user to pay the ransom money.

    Faulty declarations regarding illegal web content.

    In countries where software program piracy is much less popular, this method is not as effective for the cyber frauds. Alternatively, the Trojan-Ransom.Win32.Cryptodef.acfx popup alert may falsely declare to be stemming from a police organization and will certainly report having located youngster porn or various other illegal information on the device.

    Trojan-Ransom.Win32.Cryptodef.acfx popup alert may wrongly declare to be deriving from a regulation enforcement establishment and also will report having located kid pornography or other prohibited data on the gadget. The alert will similarly have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 059DFDDB
md5: 56f695d70a1cf1e1cc1e6b2710aab545
name: 56F695D70A1CF1E1CC1E6B2710AAB545.mlw
sha1: 24482a5aac57fdbfa4576e9f2ce4b7ded6913ccc
sha256: 6618a1777c32d391bf6c628a571c8413bb253a176de486c049d3e6f4d02e061c
sha512: f47d15b073d774a947456d892f2a966d574f38411efe60c7f0ba864e92a1c752a94fe893c952322f75e170e8d9f7783036c6b342e1b5286e35b4d3cbe82b3275
ssdeep: 6144:mfs1qUrfCMMGJqNd9tRNl0pHQmBXUlfPSnBR+1t3mM2Nuhb+r8BJxVT2:mU1zXST9t3aHQWXUdPSwt3mM2Kb+eq
type: PE32 executable (GUI) Intel 80386 system file, for MS Windows

Version Info:

CompiledScript: AutoIt v3 Script: 3, 3, 6, 1
FileVersion: 3, 3, 6, 1
FileDescription:
Translation: 0x0809 0x04b0

Trojan-Ransom.Win32.Cryptodef.acfx also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader18.44918
Cynet Malicious (score: 90)
CAT-QuickHeal Ransom.Crowti.RW8
ALYac Trojan.Ransom.TeslaCrypt
Cylance Unsafe
Zillya Trojan.Filecoder.Win32.1723
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Alibaba Ransom:Win32/Cryptodef.bce8880a
K7GW Riskware ( 0040eff71 )
Cybereason malicious.70a1cf
Cyren W32/Filecoder.VZHG-4443
Symantec Ransom.Cryptodefense
ESET-NOD32 Win32/Filecoder.CryptoWall.F
Zoner Trojan.Win32.37970
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Cryptodef.acfx
BitDefender Trojan.GenericKD.2970528
NANO-Antivirus Trojan.Win32.Dwn.dznwzl
MicroWorld-eScan Trojan.GenericKD.2970528
Tencent Win32.Trojan.Raas.Auto
Ad-Aware Trojan.GenericKD.2970528
Sophos Mal/Generic-S + Mal/Generic-L
Comodo Malware@#xoaqsuhbxa2r
BitDefenderTheta Gen:NN.ZexaF.34628.tu0@aeK!@gxi
VIPRE Win32.Malware!Drop
TrendMicro Ransom_CRYPWALL.AGY
McAfee-GW-Edition Generic.xy
FireEye Generic.mg.56f695d70a1cf1e1
Emsisoft Trojan.GenericKD.2970528 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Cryptodef.qn
Webroot W32.Trojan.Gen
Avira TR/Andromeda.618975
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Crowti.A
Arcabit Trojan.Generic.D2D53A0
AegisLab Trojan.Win32.Cryptodef.4!c
GData Win32.Trojan.Agent.9ZY0GZ
AhnLab-V3 Trojan/Win32.Ransom.C1316455
McAfee Generic.xy
MAX malware (ai score=100)
VBA32 Hoax.Cryptodef
Malwarebytes Malware.Heuristic.1004
Panda Trj/WLT.B
TrendMicro-HouseCall Ransom_CRYPWALL.AGY
Rising Ransom.Crowti!8.37D (C64:YzY0OrNgzk9rSpVb)
Yandex Trojan.Agent.Gen.AFL
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Filecoder.FJ!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Cryptodef.HxQBzHIA

How to remove Trojan-Ransom.Win32.Cryptodef.acfx 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-Ransom.Win32.Cryptodef.acfx 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-Ransom.Win32.Cryptodef.acfx 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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