Trojan-Ransom.Win32.Cryptodef.afqz

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

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

In this article you will certainly find about the interpretation of Trojan-Ransom.Win32.Cryptodef.afqz as well as its negative impact on your computer. Such ransomware are a kind of malware that is clarified by online fraudulences to demand paying the ransom by a sufferer.

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In the majority of the situations, Trojan-Ransom.Win32.Cryptodef.afqz virus will certainly advise its victims to start funds move for the objective of reducing the effects of the changes that the Trojan infection has actually introduced to the target’s tool.

Trojan-Ransom.Win32.Cryptodef.afqz 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 (Process Hollowing);
  • Compression (or decompression);
  • Attempts to connect to a dead IP:Port (4 unique times);
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • Mimics the system’s user agent string for its own requests;
  • 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.

  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Polish;
  • Executed a process and injected code into it, probably while unpacking;
  • 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 documents found on the victim’s hard disk drive — so the sufferer can no more use the data;
  • Preventing routine accessibility 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.
Similar behavior
Related domains
clientchatlive.comRansom:Win32/Cryptodef.15f95fec
ocsp.usertrust.comRansom:Win32/Cryptodef.15f95fec
ocsp.sectigo.comRansom:Win32/Cryptodef.15f95fec
crt.usertrust.comRansom:Win32/Cryptodef.15f95fec
crl.usertrust.comRansom:Win32/Cryptodef.15f95fec
crl.comodoca.comRansom:Win32/Cryptodef.15f95fec
ocsp.comodoca.comRansom:Win32/Cryptodef.15f95fec

Trojan-Ransom.Win32.Cryptodef.afqz

The most common channels through which Trojan-Ransom.Win32.Cryptodef.afqz are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a consequence of individual winding up on a source that organizes a harmful software application;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s computer or prevent the device from operating in an appropriate fashion – while likewise placing a ransom note that mentions the requirement for the sufferers to impact the payment for the purpose of decrypting the records or bring back the data system back to the preliminary condition. In many instances, the ransom money note will show up when the client reboots the PC after the system has currently been damaged.

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

In different edges of the globe, Trojan-Ransom.Win32.Cryptodef.afqz grows by leaps as well as bounds. Nonetheless, the ransom notes as well as methods of extorting the ransom amount may vary depending upon particular neighborhood (local) setups. The ransom money notes and also techniques of obtaining the ransom quantity might differ depending on specific regional (regional) settings.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software application.

    In certain locations, the Trojans usually wrongfully report having actually detected some unlicensed applications enabled on the target’s gadget. The sharp after that requires the customer to pay the ransom.

    Faulty statements concerning unlawful web content.

    In countries where software program piracy is less prominent, this method is not as efficient for the cyber fraudulences. Alternatively, the Trojan-Ransom.Win32.Cryptodef.afqz popup alert might incorrectly declare to be stemming from a law enforcement institution and also will report having situated kid pornography or other unlawful data on the gadget.

    Trojan-Ransom.Win32.Cryptodef.afqz popup alert may incorrectly claim to be acquiring from a legislation enforcement establishment and will report having situated youngster porn or various other unlawful data on the tool. The alert will similarly contain a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 2BE8B00A
md5: 2f4f4a691a3f00d38f6ec1af0a9215a5
name: 2F4F4A691A3F00D38F6EC1AF0A9215A5.mlw
sha1: ef4b3cfcf7914cfebc3c4c7871725f7ac123e8e4
sha256: 436b0409873774c8edee668ff65445e641408398c8d6eb7b6cfb673f34a63fc9
sha512: 9946cc91182cd1efd031ef7566840300337c70d554d751edfb7b4cf76cce9b60ca59a163b286427b2e088f45f840cb407ac97611fdaa49b3b3cf22d301341215
ssdeep: 6144:K2Fvt7nvMcedhfor5/phjOrcVmjVplXiTS4Ag4hIa:KsMceUfhiflXGS4P4hIa
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

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

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
K7AntiVirusTrojan ( 0055e3991 )
Elasticmalicious (high confidence)
DrWebTrojan.MulDrop6.31560
CynetMalicious (score: 100)
CAT-QuickHealTrojan.Generic.B4
ALYacTrojan.GenericKDZ.32058
CylanceUnsafe
ZillyaTrojan.Injector.Win32.361683
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
AlibabaRansom:Win32/Cryptodef.15f95fec
K7GWTrojan ( 0055e3991 )
Cybereasonmalicious.91a3f0
CyrenW32/Trojan.LIUF-5633
SymantecRansom.Cryptolocker
ESET-NOD32Win32/Filecoder.CryptoWall.F
ZonerTrojan.Win32.38327
APEXMalicious
AvastWin32:Trojan-gen
KasperskyTrojan-Ransom.Win32.Cryptodef.afqz
BitDefenderTrojan.GenericKDZ.32058
NANO-AntivirusTrojan.Win32.VB.eahuvx
SUPERAntiSpywareRansom.CryptoWall/Variant
MicroWorld-eScanTrojan.GenericKDZ.32058
TencentMalware.Win32.Gencirc.10c2c6f8
Ad-AwareTrojan.GenericKDZ.32058
SophosMal/Generic-R + Mal/Zbot-UM
ComodoMalware@#23yfl5m3i7zwr
BitDefenderThetaAI:Packer.E9D96DE926
VIPRETrojan.Win32.Generic!BT
McAfee-GW-EditionGenericRXFD-HP!2F4F4A691A3F
FireEyeGeneric.mg.2f4f4a691a3f00d3
EmsisoftTrojan.GenericKDZ.32058 (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan.Cryptodef.adp
WebrootW32.Rogue.Gen
AviraHEUR/AGEN.1128856
eGambitUnsafe.AI_Score_99%
Antiy-AVLTrojan/Generic.ASMalwS.171EE32
MicrosoftTrojan:Win32/Upatre
AegisLabTrojan.Win32.Cryptodef.j!c
GDataTrojan.GenericKDZ.32058
AhnLab-V3Trojan/Win32.CryptoWall.R174343
McAfeeGenericRXFD-HP!2F4F4A691A3F
MAXmalware (ai score=84)
VBA32BScope.Malware-Cryptor.Hlux
MalwarebytesNimnul.Virus.FileInfector.DDS
PandaTrj/Genetic.gen
RisingMalware.Obscure/Heur!1.9E03 (CLASSIC)
YandexTrojan.Diple!V+tY+8LaDEU
IkarusTrojan.Win32.Boaxxe
MaxSecureTrojan.Malware.74781853.susgen
FortinetW32/Hematite.C!tr
AVGWin32:Trojan-gen
Paloaltogeneric.ml

How to remove Trojan-Ransom.Win32.Cryptodef.afqz 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-Ransom.Win32.Cryptodef.afqz 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.afqz 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/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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