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

What is Ransom:MSIL/Bitteroo.A!rsm infection?

In this article you will certainly find regarding the interpretation of Ransom:MSIL/Bitteroo.A!rsm and also its negative impact on your computer. Such ransomware are a kind of malware that is clarified by on the internet fraudulences to demand paying the ransom by a target.

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Most of the instances, Ransom:MSIL/Bitteroo.A!rsm ransomware will certainly advise its sufferers to launch funds move for the function of neutralizing the amendments that the Trojan infection has presented to the victim’s gadget.

Ransom:MSIL/Bitteroo.A!rsm Summary

These alterations can be as adheres to:

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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.
  • Ciphering the papers found on the target’s hard disk — so the victim can no longer utilize the information;
  • Preventing routine access 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.


One of the most normal networks where Ransom:MSIL/Bitteroo.A!rsm Trojans are infused are:

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

As soon as the Trojan is effectively injected, it will either cipher the information on the victim’s PC or avoid the device from operating in a correct fashion – while also positioning a ransom money note that discusses the need for the sufferers to impact the payment for the function of decrypting the files or restoring the data system back to the first problem. In many instances, the ransom money note will certainly turn up when the client reboots the PC after the system has actually already been damaged.

Ransom:MSIL/Bitteroo.A!rsm circulation networks.

In different edges of the world, Ransom:MSIL/Bitteroo.A!rsm expands by jumps and also bounds. Nonetheless, the ransom notes as well as methods of extorting the ransom money quantity might vary depending upon particular regional (regional) settings. The ransom money notes and also methods of extorting the ransom amount may differ depending on particular regional (regional) settings.

Ransomware injection

For example:

    Faulty alerts about unlicensed software application.

    In particular locations, the Trojans commonly wrongfully report having actually identified some unlicensed applications enabled on the victim’s tool. The sharp then demands the user to pay the ransom.

    Faulty declarations regarding unlawful material.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber scams. Additionally, the Ransom:MSIL/Bitteroo.A!rsm popup alert might falsely declare to be originating from a police establishment and also will certainly report having situated kid pornography or various other unlawful data on the gadget.

    Ransom:MSIL/Bitteroo.A!rsm popup alert may wrongly declare to be deriving from a legislation enforcement establishment and also will certainly report having situated youngster porn or various other unlawful data on the gadget. The alert will likewise contain a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 22F2AFCA
md5: 023bad929560596476082cdfe8472d37
name: 023BAD929560596476082CDFE8472D37.mlw
sha1: b654966bb98e2ece4ed6e75ab3da100d8afea13f
sha256: a468b9a6ce1c25a7e003e3f84a78b1ad69c9762a9d324ffdd9c16d0a33ded024
sha512: b8148dddbfde85e16b255a3a1ecfe88e9351055ec265cf634476019ef2f2b21a1c5e5ae242801d83dd47a82c46670b2a900da477c3ebb3ecefffef8293cf1888
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2016
Assembly Version:
InternalName: BitKangoroo.exe
CompanyName: Microsoft Corporation
LegalTrademarks: Microsoft Corporation
Comments: DNS responder
ProductName: BitKangoroo
FileDescription: BitKangoroo
OriginalFilename: BitKangoroo.exe

Ransom:MSIL/Bitteroo.A!rsm also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0050d59f1 )
DrWeb Trojan.Encoder.11308
ALYac Trojan.Ransom.BitKangoroo
Cylance Unsafe
Zillya Trojan.Agent.Win32.786342
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:MSIL/Bitteroo.3f028e54
K7GW Trojan ( 0050d59f1 )
Cybereason malicious.295605
Symantec Ransom.Gen
ESET-NOD32 a variant of MSIL/Filecoder.BitKangoroo.A
APEX Malicious
Avast MSIL:Filecoder-M [Trj]
Kaspersky Trojan-Ransom.MSIL.Agent.yl
BitDefender Generic.Ransom.Hiddentear.A.5E244E4E
NANO-Antivirus Trojan.Win32.Ransom.eoxovx
ViRobot Trojan.Win32.S.BitKangoroo.341504
MicroWorld-eScan Generic.Ransom.Hiddentear.A.5E244E4E
Tencent Malware.Win32.Gencirc.114b0200
Ad-Aware Generic.Ransom.Hiddentear.A.5E244E4E
Sophos Troj/Bitteroo-A
Comodo Malware@#1xtsh96a7gpya
BitDefenderTheta Gen:NN.ZemsilF.34692.um0@aOjWoMe
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_BITKANGROO.B
McAfee-GW-Edition BehavesLike.Win32.Trojan.fc
FireEye Generic.Ransom.Hiddentear.A.5E244E4E
Emsisoft Malware.Generic.CN1 (A)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.MSIL.ljvz
Webroot W32.Ransomware.Gen
Antiy-AVL Trojan/Generic.ASMalwS.201B50F
Kingsoft Win32.Troj.Agent.uu.(kcloud)
Microsoft Ransom:MSIL/Bitteroo.A!rsm
Arcabit Generic.Ransom.Hiddentear.A.5E244E4E
AegisLab Trojan.MSIL.Agent.j!c
GData MSIL.Trojan-Ransom.Bitkangoroo.A
McAfee Artemis!023BAD929560
MAX malware (ai score=99)
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_BITKANGROO.B
Rising Ransom.BitKangoroo!1.B2FE (CLASSIC)
Yandex Trojan.Agent!YS7BM/GUFwk
Ikarus Trojan.MSIL.Filecoder
Fortinet MSIL/Generic.AP.82E04C!tr
AVG MSIL:Filecoder-M [Trj]
Paloalto generic.ml

How to remove Ransom:MSIL/Bitteroo.A!rsm 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 Ransom:MSIL/Bitteroo.A!rsm 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 Ransom:MSIL/Bitteroo.A!rsm you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
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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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