What is MSIL/Agent.AYD infection?

In this post you will certainly find concerning the interpretation of MSIL/Agent.AYD and its adverse influence on your computer system. Such ransomware are a kind of malware that is clarified by on the internet scams to require paying the ransom money by a victim.

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When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the instances, MSIL/Agent.AYD ransomware will instruct its sufferers to start funds move for the purpose of reducing the effects of the amendments that the Trojan infection has presented to the sufferer’s device.

MSIL/Agent.AYD Summary

These modifications can be as complies with:

  • 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.
  • 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.
  • A process created a hidden window;
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • 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.
  • Creates a copy of itself;
  • Ciphering the records located on the target’s disk drive — so the target can no more utilize the information;
  • Preventing routine access to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most common networks whereby MSIL/Agent.AYD are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of user winding up on a resource that hosts a malicious software;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the target’s computer or prevent the device from operating in a correct fashion – while also positioning a ransom money note that states the requirement for the victims to effect the payment for the purpose of decrypting the records or restoring the data system back to the first problem. In a lot of circumstances, the ransom money note will certainly come up when the client reboots the PC after the system has actually currently been damaged.

MSIL/Agent.AYD distribution channels.

In numerous edges of the globe, MSIL/Agent.AYD expands by jumps and also bounds. Nonetheless, the ransom money notes and methods of obtaining the ransom quantity may differ depending on particular regional (local) settings. The ransom money notes as well as tricks of obtaining the ransom money quantity might vary depending on specific neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software application.

    In certain areas, the Trojans usually wrongfully report having found some unlicensed applications made it possible for on the sufferer’s gadget. The alert after that demands the customer to pay the ransom money.

    Faulty statements regarding prohibited content.

    In countries where software program piracy is less prominent, this approach is not as reliable for the cyber scams. Conversely, the MSIL/Agent.AYD popup alert might falsely claim to be stemming from a law enforcement establishment and will certainly report having situated child porn or various other prohibited information on the gadget.

    MSIL/Agent.AYD popup alert may incorrectly assert to be deriving from a law enforcement institution and also will report having situated youngster porn or other prohibited data on the gadget. The alert will in a similar way contain a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: 7C9D9C3F
md5: 1c85519c16a5f36d154e3cdca586f7f8
name: 1C85519C16A5F36D154E3CDCA586F7F8.mlw
sha1: cf36df3d8489d22b3eb04a0eef8e11b7c5cdcc74
sha256: 8d23f0a69e098de9786678e2f5f69f67e8467a29593a4aee0c81be38f68b1cbb
sha512: 804068eb6e937069b242714031e440a6a71054935b71481677db0beb457b8d036cd64180a73f789e195d75334a777e5232bf9acd53897acce3b8e63322e7c136
ssdeep: 3072:y9jG2VTnkVG4xOrHRVJEMVDqMK2z9IDcQULwZVpr:8jLxkVGgGxVJ9DdK2z9IofQp
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: xa9 Microsoft Corporation. All rights reserved
Assembly Version:
InternalName: MSShell32.exe
CompanyName: Microsoft Corporation
Comments: Microsoft Windows Shell32
ProductName: Microsoft Windows Shell32
FileDescription: Microsoft Windows Shell32
OriginalFilename: MSShell32.exe

MSIL/Agent.AYD also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 005130b61 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader25.14356
Cynet Malicious (score: 85)
CAT-QuickHeal Trojan.YakbeexMSIL.ZZ4
ALYac Gen:Variant.MSILPerseus.115610
Cylance Unsafe
Zillya Trojan.Agent.Win32.1087954
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.31d642af
K7GW Trojan ( 005130b61 )
Cybereason malicious.c16a5f
Symantec W32.Golroted
ESET-NOD32 a variant of MSIL/Agent.AYD
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.kdry
BitDefender Gen:Variant.MSILPerseus.115610
NANO-Antivirus Trojan.Win32.Blocker.ergszm
MicroWorld-eScan Gen:Variant.MSILPerseus.115610
Tencent Win32.Trojan.Blocker.Eant
Ad-Aware Gen:Variant.MSILPerseus.115610
Sophos Mal/Generic-S
BitDefenderTheta Gen:NN.ZemsilF.34608.hm0@a4eSFth
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_Blocker.R002C0OKH20
McAfee-GW-Edition GenericRXLJ-PG!1C85519C16A5
Emsisoft Gen:Variant.MSILPerseus.115610 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Agent.ypazf
eGambit Unsafe.AI_Score_98%
Microsoft Trojan:Win32/Tiggre!rfn
Arcabit Trojan.MSILPerseus.D1C39A
ZoneAlarm Trojan-Ransom.Win32.Blocker.kdry
GData Gen:Variant.MSILPerseus.115610
AhnLab-V3 Win-Trojan/FCN.140610.X1385
McAfee GenericRXLJ-PG!1C85519C16A5
MAX malware (ai score=86)
VBA32 TScope.Trojan.MSIL
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_Blocker.R002C0OKH20
Rising Ransom.Blocker!8.12A (C64:YzY0Oq4A+k++zcmi)
Ikarus Trojan.MSIL.Agent
MaxSecure Trojan.Malware.771626.susgen
Fortinet W32/Blocker.AYD!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Blocker.HgIASOoA

How to remove MSIL/Agent.AYD 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 MSIL/Agent.AYD 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.AYD 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

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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