Trojan.Cutwail

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

What is Trojan.Cutwail infection?

In this short article you will certainly find concerning the interpretation of Trojan.Cutwail as well as its unfavorable impact on your computer. Such ransomware are a kind of malware that is elaborated by on the internet scams to require paying the ransom by a sufferer.

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Most of the situations, Trojan.Cutwail ransomware will instruct its targets to launch funds move for the purpose of reducing the effects of the modifications that the Trojan infection has presented to the victim’s tool.

Trojan.Cutwail Summary

These alterations can be as complies with:

  • 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);
  • Presents an Authenticode digital signature;
  • 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.
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • 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
  • Ciphering the papers located on the sufferer’s hard disk — so the target can no longer use the data;
  • Preventing routine access to the sufferer’s workstation;

Trojan.Cutwail

One of the most common channels through which Trojan.Cutwail Ransomware Trojans are injected are:

  • By ways of phishing emails;
  • As an effect of individual winding up on a resource that holds a destructive software application;

As soon as the Trojan is effectively infused, it will certainly either cipher the information on the sufferer’s computer or stop the gadget from working in an appropriate way – while likewise positioning a ransom money note that points out the demand for the targets to effect the repayment for the objective of decrypting the files or bring back the data system back to the preliminary condition. In many circumstances, the ransom note will come up when the customer reboots the COMPUTER after the system has currently been damaged.

Trojan.Cutwail circulation channels.

In numerous corners of the globe, Trojan.Cutwail expands by jumps and also bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom money quantity might differ depending on certain regional (regional) setups. The ransom notes and methods of extorting the ransom amount may vary depending on particular regional (local) settings.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software.

    In specific areas, the Trojans typically wrongfully report having spotted some unlicensed applications enabled on the victim’s device. The alert after that requires the customer to pay the ransom.

    Faulty statements about unlawful content.

    In nations where software piracy is less preferred, this approach is not as reliable for the cyber fraudulences. Alternatively, the Trojan.Cutwail popup alert might wrongly claim to be stemming from a police organization and will certainly report having situated child porn or various other unlawful information on the tool.

    Trojan.Cutwail popup alert might falsely assert to be obtaining from a regulation enforcement organization and also will certainly report having located youngster pornography or other prohibited data on the device. The alert will in a similar way contain a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: 3B2F391B
md5: e0289e6636816b2503e86ea09648ede0
name: E0289E6636816B2503E86EA09648EDE0.mlw
sha1: 08982c7ab62ffb7e08d548bcdd0f74587d9c6045
sha256: 83ed9d23bb8280fce285191693c06447911682b52c6b474060a1656fd2f67c79
sha512: 9fbe6459e703882a245575fc6493032973f5d8d53ab6435bbd769bca0a3171051dfaa653b9a4a3d2927985142c00f3dd7ec36ec1ed05fd847233148565a465a3
ssdeep: 6144:unQU+LqGvHr0nNK11G9DMEeZa8POyKmLUyaViFwRuj:RFrkNK11G9AEtMxQyOi6U
type: PE32 executable (DLL) (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Cutwail also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.malware.sig1
Elasticmalicious (high confidence)
DrWebBackDoor.Qbot.554
MicroWorld-eScanTrojan.Agent.EZUU
FireEyeGeneric.mg.e0289e6636816b25
McAfeeW32/PinkSbot-HE!E0289E663681
CylanceUnsafe
SangforMalware
BitDefenderTrojan.Agent.EZUU
K7AntiVirusRiskware ( 0049f6ae1 )
SymantecTrojan.Maltrec.TS
KasperskyUDS:DangerousObject.Multi.Generic
Ad-AwareTrojan.Agent.EZUU
EmsisoftMalCert.A (A)
F-SecureHeuristic.HEUR/AGEN.1134669
McAfee-GW-EditionBehavesLike.Win32.Generic.fh
SophosML/PE-A + Mal/EncPk-APW
AviraHEUR/AGEN.1134669
MicrosoftTrojan:Win32/Wacatac.B!ml
GridinsoftRansom.Win32.Wacatac.oa!s1
ArcabitTrojan.Agent.EZUU
ZoneAlarmUDS:DangerousObject.Multi.Generic
GDataTrojan.Agent.EZUU
CynetMalicious (score: 100)
VBA32Malware-Cryptor.General.3
ALYacTrojan.Agent.EZUU
MAXmalware (ai score=87)
MalwarebytesTrojan.Cutwail
APEXMalicious
ESET-NOD32Win32/Qbot.CU
eGambitUnsafe.AI_Score_65%
FortinetW32/Qbot.CU!tr
Paloaltogeneric.ml
Qihoo-360HEUR/QVM39.1.AA9B.Malware.Gen

How to remove Trojan.Cutwail 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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.Cutwail 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 Trojan.Cutwail 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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