MSIL/Agent.AYD

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.

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.

MSIL/Agent.AYD

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: 7C9D9C3Fmd5: 1c85519c16a5f36d154e3cdca586f7f8name: 1C85519C16A5F36D154E3CDCA586F7F8.mlwsha1: cf36df3d8489d22b3eb04a0eef8e11b7c5cdcc74sha256: 8d23f0a69e098de9786678e2f5f69f67e8467a29593a4aee0c81be38f68b1cbbsha512: 804068eb6e937069b242714031e440a6a71054935b71481677db0beb457b8d036cd64180a73f789e195d75334a777e5232bf9acd53897acce3b8e63322e7c136ssdeep: 3072:y9jG2VTnkVG4xOrHRVJEMVDqMK2z9IDcQULwZVpr:8jLxkVGgGxVJ9DdK2z9IofQptype: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0LegalCopyright: xa9 Microsoft Corporation. All rights reservedAssembly Version: 1.0.0.0InternalName: MSShell32.exeFileVersion: 1.0.0.0CompanyName: Microsoft CorporationLegalTrademarks: Comments: Microsoft Windows Shell32ProductName: Microsoft Windows Shell32ProductVersion: 1.0.0.0FileDescription: Microsoft Windows Shell32OriginalFilename: 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
FireEye Generic.mg.1c85519c16a5f36d
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
Paloalto generic.ml
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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

If the guide doesn’t help you to remove MSIL/Agent.AYD you can always ask me in the comments for getting help.

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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