Backdoor:Win32/Konus.A

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

What is Backdoor:Win32/Konus.A infection?

In this article you will find concerning the meaning of Backdoor:Win32/Konus.A and also its negative effect 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 sufferer.

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Most of the instances, Backdoor:Win32/Konus.A infection will instruct its sufferers to launch funds transfer for the objective of neutralizing the changes that the Trojan infection has actually presented to the sufferer’s gadget.

Backdoor:Win32/Konus.A 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);
  • 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.
  • Starts servers listening on 127.0.0.1:32767, 127.0.0.1:32768;
  • 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.

  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Executed a process and injected code into it, probably while unpacking;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Clears Windows events or logs;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Attempts to modify Explorer settings to prevent file extensions from being displayed;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Ciphering the documents located on the sufferer’s hard disk — so the sufferer can no more utilize the data;
  • 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.

Backdoor:Win32/Konus.A

The most typical networks through which Backdoor:Win32/Konus.A are injected are:

  • By ways of phishing e-mails;
  • As a repercussion of individual winding up on a resource that holds a harmful software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the information on the target’s computer or protect against the gadget from operating in an appropriate way – while also placing a ransom money note that states the demand for the victims to impact the payment for the function of decrypting the files or bring back the file system back to the preliminary condition. In most circumstances, the ransom money note will turn up when the customer restarts the COMPUTER after the system has already been harmed.

Backdoor:Win32/Konus.A distribution networks.

In different corners of the globe, Backdoor:Win32/Konus.A grows by jumps as well as bounds. Nonetheless, the ransom money notes as well as tricks of obtaining the ransom money amount might differ depending upon specific regional (local) setups. The ransom money notes as well as tricks of extorting the ransom money amount might differ depending on certain local (local) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software.

    In particular locations, the Trojans frequently wrongfully report having spotted some unlicensed applications enabled on the sufferer’s tool. The alert then requires the customer to pay the ransom.

    Faulty statements about illegal material.

    In countries where software program piracy is less popular, this technique is not as efficient for the cyber scams. Conversely, the Backdoor:Win32/Konus.A popup alert might incorrectly claim to be originating from a law enforcement establishment as well as will certainly report having situated child porn or other unlawful information on the tool.

    Backdoor:Win32/Konus.A popup alert might falsely declare to be deriving from a regulation enforcement establishment and also will certainly report having situated kid porn or other illegal information on the tool. The alert will likewise have a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: E95AB515
md5: 9ad9a8d1ba6c0440edaafe81b7934db2
name: 9AD9A8D1BA6C0440EDAAFE81B7934DB2.mlw
sha1: 8bba2a011f72d2016b65d3c4e9e7cbee9a4cf27f
sha256: 0c22dbc5e7f67c0bbd1cccc57472b03ce4f9da81e3e5a2d90309e382021e3831
sha512: 6faa0b8000d6969fa3997ace614737b0981b33d448c64b3a1a4d2525773b41bae3afb6925b721b82e1b992bad33934d3906a5d3ac291b1ade9a2e13459548443
ssdeep: 6144:0W+7+eMnFVjJetPYvAP7mAYFkrhUerTti0lvUWDYuxwivrQyASsUm90pBLi5Fc7U:0RuFVNe6lAYFkrhRNlvUHuxw0rQtSsth
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

LegalCopyright: (C) 2016 Oracle
InternalName: VBoxWindowsAdditions-x86.exe
FileVersion: VBox 5.0.1.0
CompanyName: Oracle
ProductName: VBox Guest Additions
ProductVersion: 5.0.1.0
FileDescription: VBox Guest Additions
Translation: 0x040c 0x04e4

Backdoor:Win32/Konus.A also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 004fb47d1 )
DrWebTrojan.DownLoader23.11526
CynetMalicious (score: 100)
CAT-QuickHealTrojan.Generic
ALYacGen:Variant.Ransom.2019
CylanceUnsafe
ZillyaTrojan.GenericKD.Win32.128264
SangforBackdoor.Win32.Konus.8
CrowdStrikewin/malicious_confidence_90% (W)
AlibabaTrojan:Win32/Injector.16b77291
K7GWTrojan ( 004fb47d1 )
Cybereasonmalicious.1ba6c0
SymantecML.Attribute.HighConfidence
ESET-NOD32NSIS/Injector.HF
APEXMalicious
AvastWin32:Malware-gen
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderGen:Variant.Ransom.2019
NANO-AntivirusTrojan.Win32.Blocker.eijwlg
SUPERAntiSpywareRansom.Locky/Variant
MicroWorld-eScanGen:Variant.Ransom.2019
TencentWin32.Trojan.Generic.Hxgj
Ad-AwareGen:Variant.Ransom.2019
SophosMal/Generic-R + Mal/Miuref-L
ComodoMalware@#3prpg41gdkyx7
VIPRETrojan.Win32.Generic!BT
TrendMicroRansom_NSISRansom.SM001
McAfee-GW-EditionBehavesLike.Win32.Dropper.fc
FireEyeGen:Variant.Ransom.2019
EmsisoftGen:Variant.Ransom.2019 (B)
WebrootTrojan.Dropper.Gen
AviraHEUR/AGEN.1102533
KingsoftWin32.Troj.Undef.(kcloud)
MicrosoftBackdoor:Win32/Konus.A
ArcabitTrojan.Ransom.D7E3
AegisLabTrojan.Win32.Generic.4!c
GDataGen:Variant.Ransom.2019
TACHYONRansom/W32.Blocker.392130
AhnLab-V3Trojan/Win32.Locky.C1614510
McAfeeArtemis!9AD9A8D1BA6C
MAXmalware (ai score=89)
VBA32Trojan.Downloader
MalwarebytesRansom.Cerber
PandaTrj/CI.A
TrendMicro-HouseCallRansom_NSISRansom.SM001
FortinetW32/Injector.HC!tr
AVGWin32:Malware-gen
Paloaltogeneric.ml
Qihoo-360Win32/Trojan.Ransom.e0e

How to remove Backdoor:Win32/Konus.A ransomware?

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 Backdoor:Win32/Konus.A 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 Backdoor:Win32/Konus.A 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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