Written by Robert Bailey

What is BAT/BadJoke.KO infection?

In this article you will certainly discover concerning the definition of BAT/BadJoke.KO and also its adverse impact on your computer system. Such ransomware are a type of malware that is specified by online fraudulences to demand paying the ransom money by a victim.

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In the majority of the instances, BAT/BadJoke.KO ransomware will certainly advise its targets to launch funds transfer for the objective of reducing the effects of the changes that the Trojan infection has introduced to the target’s device.

BAT/BadJoke.KO Summary

These alterations can be as adheres to:

  • A process created a hidden window;
  • Uses Windows utilities for basic functionality;
  • Network activity detected but not expressed in API logs;
  • Anomalous binary characteristics;
  • Ciphering the papers found on the target’s hard disk drive — so the sufferer can no more utilize the information;
  • Preventing normal accessibility to the sufferer’s workstation;

Related domains: Trojanransom.Encoder Trojanransom.Encoder


One of the most typical channels where BAT/BadJoke.KO Trojans are infused are:

  • By ways of phishing e-mails;
  • As a consequence of customer winding up on a source that holds a destructive software application;

As soon as the Trojan is successfully injected, it will certainly either cipher the information on the target’s computer or protect against the gadget from operating in an appropriate manner – while additionally putting a ransom note that states the need for the sufferers to impact the repayment for the objective of decrypting the documents or bring back the file system back to the initial condition. In a lot of circumstances, the ransom note will certainly show up when the client restarts the COMPUTER after the system has actually currently been damaged.

BAT/BadJoke.KO distribution channels.

In different corners of the globe, BAT/BadJoke.KO expands by leaps and bounds. Nevertheless, the ransom notes as well as methods of obtaining the ransom money amount might differ depending upon certain local (local) setups. The ransom money notes as well as methods of obtaining the ransom money amount may differ depending on particular local (local) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software application.

    In specific areas, the Trojans usually wrongfully report having actually spotted some unlicensed applications allowed on the sufferer’s device. The sharp after that requires the individual to pay the ransom money.

    Faulty statements concerning illegal web content.

    In nations where software piracy is much less prominent, this technique is not as efficient for the cyber fraudulences. Conversely, the BAT/BadJoke.KO popup alert may wrongly declare to be deriving from a police establishment and will certainly report having located youngster porn or various other unlawful information on the gadget.

    BAT/BadJoke.KO popup alert may wrongly declare to be acquiring from a regulation enforcement organization and will certainly report having situated kid porn or various other illegal data on the tool. The alert will likewise have a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 1737A202
md5: 5c281ddacaddf036d2b836b656cc3a8f
name: 5C281DDACADDF036D2B836B656CC3A8F.mlw
sha1: 93c5595c540181395fac196acd3329fde0c1b1fd
sha256: ee453b4bb7c1037fcd146a9c61540ee567953a6a24f7fbe72fa5fb7f700d022c
sha512: fb5c92180b2713d92b26a220abd13ff529a2366327c76c84379b2742bb55e456440ce87fd142323e06969c23f973ba011836a29c1c660461b2a4eeb19c508974
ssdeep: 1536:e7fPGykbOqjoHm4pICdfkLtAfupcWX50MxFY+yIOlnToIfix+xYjaVLOJ:0q6+ouCpk2mpcWJ0r+QNTBfiFjau
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

BAT/BadJoke.KO also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
CAT-QuickHeal Trojanransom.Encoder
McAfee RDN/Generic.dx
Cylance Unsafe
Zillya Tool.Lazagne.Win32.102
AegisLab Trojan.Win32.Encoder.j!c
Sangfor Malware
K7AntiVirus Trojan ( 00572cda1 )
BitDefender Trojan.GenericKD.44430827
K7GW Trojan ( 00572cda1 )
Cybereason malicious.c54018
Arcabit Trojan.Generic.D2A5F5EB
Cyren W32/Trojan.LIEP-9013
Symantec ML.Attribute.HighConfidence
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Encoder.kpq
Alibaba Trojan:BAT/BadJoke.49b54ca5
NANO-Antivirus Trojan.Win32.DelAll.gagnzn
MicroWorld-eScan Trojan.GenericKD.44430827
Rising Trojan.Generic@ML.98 (RDMK:BYFhOIQBKwCBK4TG+GqrCw)
Ad-Aware Trojan.GenericKD.44430827
Sophos Mal/Generic-S
Comodo Malware@#13z85y2k0ckqo
DrWeb Joke.Picture.5
VIPRE BAT.BadJoke (not malicious)
TrendMicro Ransom_Encoder.R002C0PKA20
Emsisoft Trojan.GenericKD.44430827 (B)
MAX malware (ai score=100)
Antiy-AVL Trojan/Win32.Tiggre
Microsoft Trojan:Win32/Ymacco.AAEE
ZoneAlarm Trojan-Ransom.Win32.Encoder.kpq
GData Trojan.GenericKD.44430827
AhnLab-V3 Malware/Gen.Generic.C4223349
ALYac Trojan.Ransom.Encoder.A
VBA32 TrojanRansom.Encoder
Panda Trj/CI.A
Zoner Trojan.Win32.85523
TrendMicro-HouseCall Ransom_Encoder.R002C0PKA20
Tencent Win32.Trojan.Encoder.Swbg
Yandex Trojan.Encoder!Sy/BKWINArA
Ikarus Trojan.BAT.BadJoke
MaxSecure Trojan.Malware.109656117.susgen
Fortinet W32/Encoder.KO!tr
AVG Other:Malware-gen [Trj]
Avast Other:Malware-gen [Trj]
CrowdStrike win/malicious_confidence_60% (D)
Qihoo-360 Generic/HEUR/QVM05.1.1F63.Malware.Gen

How to remove BAT/BadJoke.KO 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

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 BAT/BadJoke.KO 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 BAT/BadJoke.KO you can always ask me in the comments for getting help.

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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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