Trojan:Win32/DefenseEvasion!BV

Written by Robert Bailey

What is Trojan:Win32/DefenseEvasion!BV infection?

In this short article you will certainly find regarding the interpretation of Trojan:Win32/DefenseEvasion!BV and also its negative impact on your computer system. Such ransomware are a kind of malware that is elaborated by on the internet fraudulences to demand paying the ransom by a victim.

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In the majority of the cases, Trojan:Win32/DefenseEvasion!BV ransomware will advise its targets to launch funds move for the purpose of counteracting the changes that the Trojan infection has actually presented to the victim’s gadget.

Trojan:Win32/DefenseEvasion!BV Summary

These alterations can be as adheres to:

  • 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);
  • Attempts to connect to a dead IP:Port (1 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.
  • Starts servers listening on 127.0.0.1:31522;
  • 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.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Executed a process and injected code into it, probably while unpacking;
  • Installs Tor on the infected machine;
  • 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
  • Collects information about installed applications;
  • 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 files found on the target’s hard drive — so the sufferer can no more make use of the data;
  • Preventing regular accessibility to the victim’s workstation;

Trojan:Win32/DefenseEvasion!BV

One of the most regular channels where Trojan:Win32/DefenseEvasion!BV Ransomware Trojans are injected are:

  • By means of phishing emails;
  • As a consequence of customer ending up on a resource that holds a destructive software program;

As quickly as the Trojan is effectively infused, it will certainly either cipher the information on the victim’s PC or stop the gadget from functioning in a correct way – while additionally putting a ransom money note that points out the demand for the targets to impact the settlement for the function of decrypting the records or restoring the data system back to the initial problem. In many circumstances, the ransom money note will turn up when the customer reboots the PC after the system has actually currently been harmed.

Trojan:Win32/DefenseEvasion!BV distribution channels.

In different corners of the world, Trojan:Win32/DefenseEvasion!BV expands by jumps as well as bounds. However, the ransom money notes as well as methods of obtaining the ransom quantity might differ depending upon certain neighborhood (regional) settings. The ransom money notes as well as techniques of obtaining the ransom quantity may vary depending on certain local (local) settings.

Ransomware injection

For example:

    Faulty alerts about unlicensed software program.

    In particular areas, the Trojans often wrongfully report having actually spotted some unlicensed applications enabled on the victim’s device. The sharp after that demands the user to pay the ransom money.

    Faulty declarations regarding illegal web content.

    In countries where software piracy is much less preferred, this approach is not as reliable for the cyber fraudulences. Conversely, the Trojan:Win32/DefenseEvasion!BV popup alert may falsely declare to be deriving from a police organization and also will certainly report having located youngster porn or other illegal data on the gadget.

    Trojan:Win32/DefenseEvasion!BV popup alert might wrongly assert to be obtaining from a law enforcement establishment as well as will report having situated youngster porn or various other prohibited data on the tool. The alert will similarly include a need for the user to pay the ransom.

Technical details

File Info:

crc32: B1D43AC3
md5: 7bedf074953476df04436b8e4d6f8870
name: 2c.jpg
sha1: d134eda4a94d5048f72d0176f501faa4b0fafa3f
sha256: 35e627482a89782328378f62e03413e104d631e78837234075f13e1ed8e640f6
sha512: 25cce3a5b51eeded8546522da6ebd7c1c07548d419719a8681f06da72c4c70a0242f213dd1a47baa47d78d24f5f8d7925c25b837c36ce1b50deafa1eb4bc586b
ssdeep: 24576:A63TF5Hz8JNcjdGWFtA+Lj7lBC3iSRErD4sdoT3HTcV/jP3QP8jlm+2ZKFrAlSY:L3TFcNSIWFtlf7lqyrD4z3HTcV/jP3q
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright xa9 2013. All rights reserved. Hyperionics Technology LLC
InternalName: SecondFdder
FileVersion: 6.4.2.2
CompanyName: Hyperionics Technology LLC
PrivateBuild: 6.4.2.2
LegalTrademarks: Copyright xa9 2013. All rights reserved. Hyperionics Technology LLC
Comments: Adcs Cancels
ProductName: SecondFdder
Languages: English
ProductVersion: 6.4.2.2
FileDescription: Adcs Cancels
OriginalFilename: SecondFdder
Translation: 0x0409 0x04b0

Trojan:Win32/DefenseEvasion!BV also known as:

GridinSoft Trojan.Ransom.Gen
DrWeb Trojan.DownLoader30.44964
MicroWorld-eScan Trojan.GenericKD.32741325
FireEye Generic.mg.7bedf074953476df
McAfee Artemis!7BEDF0749534
Malwarebytes Trojan.MalPack.RVRS
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Shade.j!c
Sangfor Malware
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Trojan.GenericKD.32741325
K7GW Riskware ( 0040eff71 )
CrowdStrike win/malicious_confidence_90% (W)
TrendMicro Possible_HPGen-38
BitDefenderTheta Gen:NN.ZexaF.32515.AnKfayosT7fi
Symantec Downloader
APEX Malicious
Paloalto generic.ml
GData Trojan.GenericKD.32741325
Kaspersky Trojan-Ransom.Win32.Shade.qjk
Rising Trojan.Generic@ML.91 (RDML:F9vctVi02G5MktxLuJvEFw)
Ad-Aware Trojan.GenericKD.32741325
Comodo Malware@#34hjy7binwidd
F-Secure Trojan.TR/AD.Troldesh.wdond
Zillya Trojan.Shade.Win32.1160
Invincea heuristic
McAfee-GW-Edition BehavesLike.Win32.Downloader.tc
Sophos Mal/Generic-S
Ikarus Trojan-Ransom.Shade
Cyren W32/Trojan.SCPS-6470
Jiangmin Trojan.Agent.clna
Avira TR/AD.Troldesh.wdond
MAX malware (ai score=80)
Endgame malicious (moderate confidence)
Arcabit Trojan.Generic.D1F397CD
ZoneAlarm Trojan-Ransom.Win32.Shade.qjk
Microsoft Trojan:Win32/DefenseEvasion!BV
AhnLab-V3 Malware/Win32.Possible_hpgen.C3587746
Acronis suspicious
VBA32 BScope.TrojanRansom.Agent
Cylance Unsafe
Panda Trj/CI.A
ESET-NOD32 Win32/Filecoder.Shade.B
TrendMicro-HouseCall Possible_HPGen-38
Fortinet W32/Kryptik.GVSM!tr
AVG Win32:Malware-gen
Avast Win32:Malware-gen
Qihoo-360 Win32/Trojan.Ransom.cc8

How to remove Trojan:Win32/DefenseEvasion!BV 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

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 install-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:Win32/DefenseEvasion!BV 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:Win32/DefenseEvasion!BV 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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