Backdoor:Win32/Kirts.A

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

What is Backdoor:Win32/Kirts.A infection?

In this post you will certainly locate about the interpretation of Backdoor:Win32/Kirts.A as well as its negative influence on your computer. Such ransomware are a form of malware that is specified by online frauds to require paying the ransom by a target.

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Most of the cases, Backdoor:Win32/Kirts.A virus will certainly instruct its targets to initiate funds transfer for the purpose of counteracting the changes that the Trojan infection has actually presented to the sufferer’s gadget.

Backdoor:Win32/Kirts.A Summary

These adjustments can be as complies with:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Attempts to connect to a dead IP:Port (4 unique times);
  • 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.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;
  • 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.
  • Detects Sandboxie through the presence of a library;
  • Detects SunBelt Sandbox through the presence of a library;
  • Detects the presence of Wine emulator via function name;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • 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 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.
  • Operates on local firewall’s policies and settings;
  • Creates a copy of itself;
  • Attempts to disable Windows Defender;
  • Attempts to create or modify system certificates;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s hard disk drive — so the victim can no longer make use of the information;
  • Preventing routine access to the sufferer’s workstation;
Similar behavior
Related domains
plapegugufuszemnza.ru Gen:Variant.Ransom.VenusLocker.4
efhoeiahgoihaeoidd.ru Gen:Variant.Ransom.VenusLocker.4
baueibiavbiuaebifu.ru Gen:Variant.Ransom.VenusLocker.4
bcbakefbkaufuaebvd.ru Gen:Variant.Ransom.VenusLocker.4
ajkeahkcueafuiaeuf.ru Gen:Variant.Ransom.VenusLocker.4
bbackeufauefugauie.ru Gen:Variant.Ransom.VenusLocker.4
mokoaehaeihgiaheih.ru Gen:Variant.Ransom.VenusLocker.4

Backdoor:Win32/Kirts.A

The most normal channels where Backdoor:Win32/Kirts.A Trojans are infused are:

  • By methods of phishing emails;
  • As a repercussion of customer winding up on a resource that organizes a destructive software program;

As soon as the Trojan is successfully infused, it will either cipher the data on the victim’s PC or prevent the device from functioning in an appropriate way – while also putting a ransom note that mentions the need for the sufferers to impact the payment for the purpose of decrypting the records or recovering the file system back to the preliminary problem. In a lot of instances, the ransom money note will come up when the customer reboots the PC after the system has actually currently been damaged.

Backdoor:Win32/Kirts.A circulation channels.

In different corners of the world, Backdoor:Win32/Kirts.A expands by leaps as well as bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom money amount may vary depending upon particular neighborhood (local) settings. The ransom notes and techniques of extorting the ransom money quantity might differ depending on particular local (local) settings.

Ransomware injection

For example:

    Faulty signals regarding unlicensed software program.

    In specific areas, the Trojans usually wrongfully report having actually identified some unlicensed applications made it possible for on the sufferer’s gadget. The sharp then demands the customer to pay the ransom money.

    Faulty statements concerning prohibited content.

    In countries where software program piracy is much less preferred, this technique is not as efficient for the cyber fraudulences. Additionally, the Backdoor:Win32/Kirts.A popup alert might falsely declare to be deriving from a police institution as well as will report having located kid pornography or various other unlawful information on the tool.

    Backdoor:Win32/Kirts.A popup alert may falsely declare to be acquiring from a law enforcement organization as well as will report having located youngster porn or other unlawful information on the tool. The alert will in a similar way contain a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 828B4506
md5: 02067d52afd6a3beb7763efb2e84a6d0
name: 02067D52AFD6A3BEB7763EFB2E84A6D0.mlw
sha1: d78f3e87e7f8e9e616630366e333e87cc5357672
sha256: c9640c7085285497aa5751edeb044265f0ae8be5c8105c53de76236dbf4c88f8
sha512: 41206ddcdcd7726a7da25225bcad1d5a76ad7ef5c6dc5824d68dd69db2c0b851226cbf65f57e0d13c41694eff509c7974391634bd398d41e4e777282bbcb17b2
ssdeep: 3072:ornoi6ivLTE3rRpBedfolhNej+X7TLU8cTqmU:coi6ivLTE7RzedfBO2TFU
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright @ 2017
Assembly Version: 1.3.6.4
InternalName: uWoqxJpq.exe
FileVersion: 1.3.6.4
CompanyName: pWXuii Inc
Comments: dGGdZEHrweuEDJFEaQgC
ProductName: pWXuii
ProductVersion: 1.3.6.4
FileDescription: pWXuii
OriginalFilename: uWoqxJpq.exe

Backdoor:Win32/Kirts.A also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.VenusLocker.4
FireEye Generic.mg.02067d52afd6a3be
CAT-QuickHeal Trojan.YakbeexMSIL.ZZ4
ALYac Gen:Variant.Ransom.VenusLocker.4
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 00507eda1 )
BitDefender Gen:Variant.Ransom.VenusLocker.4
K7GW Trojan ( 00507eda1 )
Cybereason malicious.2afd6a
Cyren W32/Ransom.KL.gen!Eldorado
Symantec Trojan.Gen.2
APEX Malicious
Avast Win32:DangerousSig [Trj]
ClamAV Win.Trojan.Nanocore-5744216-0
Kaspersky HEUR:Trojan.MSIL.Generic
Alibaba Backdoor:Win32/Kirts.06a549d8
NANO-Antivirus Trojan.Win32.Ransom.ffhvyp
AegisLab Trojan.MSIL.Generic.4!c
Rising Backdoor.Kirts!8.5853 (CLOUD)
Ad-Aware Gen:Variant.Ransom.VenusLocker.4
Emsisoft Gen:Variant.Ransom.VenusLocker.4 (B)
Comodo TrojWare.MSIL.Injector.RJ@80ug9x
F-Secure Heuristic.HEUR/AGEN.1123281
DrWeb Trojan.DownLoader23.55149
TrendMicro BKDR_BLADABINDI.SMRQ
McAfee-GW-Edition Trojan-FNJD!02067D52AFD6
Sophos Mal/Generic-S + Mal/BadCert-Gen
Ikarus Trojan.VB.Crypt
Jiangmin Trojan.Generic.asgky
Avira HEUR/AGEN.1123281
eGambit Trojan.Generic
MAX malware (ai score=100)
Antiy-AVL Trojan/Win32.AGeneric
Microsoft Backdoor:Win32/Kirts.A
Arcabit Trojan.Ransom.VenusLocker.4
SUPERAntiSpyware Backdoor.Kirts/Variant
ZoneAlarm HEUR:Trojan.MSIL.Generic
GData Gen:Variant.Ransom.VenusLocker.4
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Noancooe.R239145
McAfee Trojan-FNJD!02067D52AFD6
VBA32 TScope.Trojan.MSIL
Malwarebytes Spyware.Pony
Panda Trj/GdSda.A
ESET-NOD32 a variant of MSIL/Injector.RJW
TrendMicro-HouseCall BKDR_BLADABINDI.SMRQ
Tencent Malware.Win32.Gencirc.10b0769f
Yandex Trojan.Agent!wFjDriIL+5Q
SentinelOne Static AI – Malicious PE
Fortinet MSIL/Injector.RJM!tr
BitDefenderTheta Gen:NN.ZemsilF.34590.im2@aaQDJHk
AVG Win32:DangerousSig [Trj]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.Ransom.094

How to remove Backdoor:Win32/Kirts.A 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 Backdoor:Win32/Kirts.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/Kirts.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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