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

What is MSIL/Agent.CUO infection?

In this short article you will locate concerning the meaning of MSIL/Agent.CUO and its adverse impact on your computer system. Such ransomware are a kind of malware that is clarified by on-line fraudulences to demand paying the ransom money by a victim.

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In the majority of the cases, MSIL/Agent.CUO ransomware will certainly advise its victims to initiate funds move for the objective of neutralizing the modifications that the Trojan infection has actually presented to the target’s gadget.

MSIL/Agent.CUO Summary

These adjustments can be as adheres to:

  • The binary likely contains encrypted or compressed data.;
  • Network activity detected but not expressed in API logs;
  • Ciphering the files located on the victim’s hard disk drive — so the target can no more make use of the data;
  • Preventing normal access to the target’s workstation;


One of the most common channels through which MSIL/Agent.CUO Ransomware Trojans are infused are:

  • By methods of phishing emails;
  • As a repercussion of individual winding up on a resource that holds a destructive software application;

As soon as the Trojan is successfully injected, it will either cipher the data on the target’s PC or prevent the tool from functioning in a correct way – while also putting a ransom note that states the requirement for the sufferers to effect the payment for the function of decrypting the papers or bring back the documents system back to the preliminary condition. In most circumstances, the ransom note will certainly show up when the client restarts the PC after the system has currently been harmed.

MSIL/Agent.CUO distribution channels.

In various corners of the world, MSIL/Agent.CUO expands by leaps and also bounds. Nonetheless, the ransom notes and methods of obtaining the ransom quantity might vary depending upon certain regional (local) settings. The ransom notes as well as tricks of extorting the ransom money quantity might vary depending on specific neighborhood (local) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software program.

    In certain areas, the Trojans usually wrongfully report having identified some unlicensed applications made it possible for on the victim’s tool. The alert after that requires the customer to pay the ransom money.

    Faulty statements about illegal content.

    In countries where software program piracy is less popular, this method is not as reliable for the cyber fraudulences. Additionally, the MSIL/Agent.CUO popup alert may falsely claim to be deriving from a police establishment and also will certainly report having situated kid pornography or other unlawful information on the gadget.

    MSIL/Agent.CUO popup alert might incorrectly assert to be acquiring from a regulation enforcement organization and will report having located kid pornography or other illegal information on the tool. The alert will similarly contain a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: EEB5A3DF
md5: a165736be1bb4d8042905e686e8539b7
name: A165736BE1BB4D8042905E686E8539B7.mlw
sha1: 1a69070a2eff42f18d24455c4d4166f8865fd6a8
sha256: 7a44e1e202c7efbc95a6568af3c5092681ca9b55ef32b3a51e8ce0677ab7a6ff
sha512: fa2ac75af96998da2373363c17bff41c9401a15973207798e464f3c10467f02242261a038c67c67dd7007b5f63a8c3d067034477697338ad2b4ebace744b902a
ssdeep: 6144:B6SOiXC4hRCCuqm3hg+MVsvE7BFomMbvk4YSNP/3f9TXsH3ei0b7nkkkRUjU:9BCMCiBngkWHkkkRUY
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Windows_Shell_Security
Assembly Version:
InternalName: Windows_Shell_Security.exe
CompanyName: Windows_Shell_Security
LegalTrademarks: Windows_Shell_Security
Comments: Windows_Shell_Security
ProductName: Windows_Shell_Security
FileDescription: Windows_Shell_Security
OriginalFilename: Windows_Shell_Security.exe

MSIL/Agent.CUO also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 700000121 )
Cynet Malicious (score: 99)
ALYac Gen:Variant.Ursu.847442
Cylance Unsafe
Zillya Trojan.Blocker.Win32.60935
Alibaba Ransom:Win32/Blocker.af9f13f8
K7GW Trojan ( 700000121 )
Cybereason malicious.be1bb4
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.njRAT-7561028-1
Kaspersky Trojan-Ransom.Win32.Blocker.jkgo
BitDefender Gen:Variant.Ursu.847442
NANO-Antivirus Trojan.Win32.Blocker.ekxkjy
MicroWorld-eScan Gen:Variant.Ursu.847442
Tencent Win32.Trojan.Blocker.Lkdh
Ad-Aware Gen:Variant.Ursu.847442
Sophos Mal/Generic-S
Comodo Malware@#38lmpajhmet4j
BitDefenderTheta Gen:NN.ZemsilF.34170.Fm0@aOUdkVi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Generic.ago
Emsisoft Gen:Variant.Ursu.847442 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.erd
Avira HEUR/AGEN.1112936
eGambit Unsafe.AI_Score_100%
Antiy-AVL Trojan/Generic.ASMalwS.19E9B23
Microsoft Backdoor:Win32/Bladabindi!ml
GData Gen:Variant.Ursu.847442
McAfee Generic.ago
MAX malware (ai score=84)
VBA32 TScope.Trojan.MSIL
Panda Trj/GdSda.A
Yandex Trojan.Blocker!JGwXlHrAMHM
Ikarus Trojan.Dropper
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Blocker.JKGO!tr
AVG Win32:Malware-gen

How to remove MSIL/Agent.CUO 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 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 MSIL/Agent.CUO 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 MSIL/Agent.CUO you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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