Trojan:Win32/Klovbot.B

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

What is Trojan:Win32/Klovbot.B infection?

In this post you will discover concerning the meaning of Trojan:Win32/Klovbot.B and its negative influence on your computer system. Such ransomware are a kind of malware that is elaborated by online frauds to demand paying the ransom money by a target.

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Most of the instances, Trojan:Win32/Klovbot.B infection will instruct its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has actually presented to the sufferer’s gadget.

Trojan:Win32/Klovbot.B Summary

These modifications 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);
  • 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.

  • Unconventionial language used in binary resources: Spanish (Modern);
  • 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
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to modify or disable Security Center warnings;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the target’s disk drive — so the target can no longer make use of the information;
  • Preventing normal accessibility to the target’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
z.whorecord.xyzTrojan-Ransom.Win32.Blocker.abeh
a.tomx.xyzTrojan-Ransom.Win32.Blocker.abeh

Trojan:Win32/Klovbot.B

The most typical channels where Trojan:Win32/Klovbot.B Ransomware Trojans are infused are:

  • By means of phishing e-mails;
  • As an effect of user ending up on a source that organizes a malicious software;

As soon as the Trojan is effectively infused, it will certainly either cipher the information on the target’s PC or prevent the tool from working in a correct fashion – while likewise placing a ransom money note that points out the need for the sufferers to impact the settlement for the objective of decrypting the papers or restoring the data system back to the initial problem. In the majority of circumstances, the ransom money note will certainly show up when the customer restarts the COMPUTER after the system has already been harmed.

Trojan:Win32/Klovbot.B circulation networks.

In numerous edges of the globe, Trojan:Win32/Klovbot.B expands by jumps as well as bounds. However, the ransom money notes as well as methods of obtaining the ransom amount might differ depending upon certain neighborhood (regional) setups. The ransom money notes and methods of obtaining the ransom money quantity may vary depending on certain neighborhood (local) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software application.

    In certain locations, the Trojans often wrongfully report having found some unlicensed applications enabled on the victim’s tool. The alert after that demands the individual to pay the ransom money.

    Faulty statements about prohibited web content.

    In countries where software program piracy is less popular, this method is not as reliable for the cyber fraudulences. Alternatively, the Trojan:Win32/Klovbot.B popup alert might incorrectly declare to be originating from a law enforcement institution and will report having situated youngster porn or various other unlawful data on the device.

    Trojan:Win32/Klovbot.B popup alert might wrongly claim to be obtaining from a legislation enforcement institution and will report having located child pornography or other unlawful information on the gadget. The alert will similarly consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 24B5B9A3
md5: 547033b56d1282f7d1d55c3bb64ec6b0
name: 547033B56D1282F7D1D55C3BB64EC6B0.mlw
sha1: 5ddae7454f998bd2988596c539b1201df93f0a7e
sha256: 471fd18954e1e3e6b098e40b18074e8a740ba2460723d98d3d8f77585ac3d534
sha512: df1150e31de7f23e7a622d469f31601fb86f33ac17b25159d22d68af8a61ce6b342a9b862f8b33ea00579d3b9a03bc992f9958feb34aaa534d9833ab3150f49a
ssdeep: 768:7En/0XLNEnkDCAgS64b3yASBAYi4OcoA839r4bNw7WjPNi7BDg7W4DNsR6/:7QME41hrSx7kA84BhjPNiVcVsRi
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0c0a 0x04b0
LegalCopyright: Googleand Googleand Googleand Googleand Googleand Googleand
InternalName: Googleand
FileVersion: 1.00
CompanyName: PostalesPostales-
LegalTrademarks: Googleand Googleand Googleand
Comments: Googleand Googleand Googleand Googleand Googleand Googleand
ProductName: Googleand Googleand Googleand
ProductVersion: 1.00
OriginalFilename: Googleand.exe

Trojan:Win32/Klovbot.B also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
DrWebTrojan.VbCrypt.252
CynetMalicious (score: 99)
ALYacGen:Variant.Symmi.11421
CylanceUnsafe
ZillyaTrojan.Blocker.Win32.3561
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (W)
K7GWTrojan ( 005267a01 )
K7AntiVirusTrojan ( 005267a01 )
CyrenW32/S-1c8c72ef!Eldorado
SymantecML.Attribute.HighConfidence
ESET-NOD32Win32/Spy.VB.NRR
APEXMalicious
AvastWin32:Malware-gen
KasperskyTrojan-Ransom.Win32.Blocker.abeh
BitDefenderGen:Variant.Symmi.11421
NANO-AntivirusTrojan.Win32.Winlock.beoqqk
ViRobotBackdoor.Win32.A.Ruskill.176128.B
MicroWorld-eScanGen:Variant.Symmi.11421
TencentWin32.Trojan.Blocker.Suxk
Ad-AwareGen:Variant.Symmi.11421
SophosML/PE-A + Mal/VBSpag-A
ComodoMalware@#1qcaai7uh09zm
BitDefenderThetaGen:NN.ZevbaF.34722.gm0@aaHRhmL
VIPRETrojan.Win32.Generic!BT
TrendMicroTROJ_SPNR.15BC13
McAfee-GW-EditionBehavesLike.Win32.Generic.cm
FireEyeGeneric.mg.547033b56d1282f7
EmsisoftGen:Variant.Symmi.11421 (B)
SentinelOneStatic AI – Malicious PE
WebrootW32.Trojan.Gen
AviraHEUR/AGEN.1117814
eGambitGeneric.Malware
Antiy-AVLTrojan/Generic.ASMalwS.5A0190
MicrosoftTrojan:Win32/Klovbot.B
AegisLabTrojan.Win32.Generic.lkwM
GDataGen:Variant.Symmi.11421
AhnLab-V3Dropper/Win32.Injector.R48034
McAfeeArtemis!547033B56D12
MAXmalware (ai score=100)
VBA32BScope.TrojanRansom.Blocker
PandaTrj/Genetic.gen
TrendMicro-HouseCallTROJ_SPNR.15BC13
YandexTrojanSpy.VB!JSN3isuVsTI
IkarusTrojan.Win32.Klovbot
FortinetW32/Injector.VQV!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml

How to remove Trojan:Win32/Klovbot.B ransomware?

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 GridinSoft2

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft3.

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:Win32/Klovbot.B 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/Klovbot.B you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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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