MSIL/Agent.QCZ

What is MSIL/Agent.QCZ infection?

In this short article you will certainly find about the interpretation of MSIL/Agent.QCZ and its adverse effect on your computer system. Such ransomware are a form of malware that is specified by online frauds to demand paying the ransom money by a target.

Most of the instances, MSIL/Agent.QCZ ransomware will certainly advise its sufferers to initiate funds move for the objective of neutralizing the changes that the Trojan infection has actually presented to the sufferer’s gadget.

MSIL/Agent.QCZ Summary

These alterations can be as adheres to:

  • 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.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Uses Windows utilities for basic functionality;
  • Exhibits behavior characteristic of iSpy Keylogger;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • Attempts to identify installed AV products by registry key;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • The sample wrote data to the system hosts file.;
  • Ciphering the files found on the target’s disk drive — so the target can no longer use the data;
  • 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.QCZ

One of the most normal channels whereby MSIL/Agent.QCZ Ransomware Trojans are injected are:

  • By means of phishing emails;
  • As an effect of customer winding up on a source that holds a malicious software;

As quickly as the Trojan is effectively injected, it will certainly either cipher the data on the sufferer’s PC or prevent the device from functioning in a proper fashion – while also putting a ransom money note that states the requirement for the sufferers to impact the payment for the objective of decrypting the papers or bring back the file system back to the preliminary condition. In a lot of instances, the ransom money note will show up when the customer restarts the COMPUTER after the system has already been damaged.

MSIL/Agent.QCZ circulation channels.

In numerous corners of the globe, MSIL/Agent.QCZ expands by leaps and bounds. Nonetheless, the ransom notes and techniques of extorting the ransom amount may differ relying on certain local (local) setups. The ransom notes and methods of extorting the ransom money amount might differ depending on certain neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty informs concerning unlicensed software.

    In particular locations, the Trojans usually wrongfully report having spotted some unlicensed applications enabled on the target’s tool. The sharp then demands the individual to pay the ransom.

    Faulty statements concerning unlawful material.

    In nations where software application piracy is much less preferred, this technique is not as effective for the cyber fraudulences. Additionally, the MSIL/Agent.QCZ popup alert might falsely claim to be stemming from a law enforcement establishment and will certainly report having situated child porn or other illegal information on the device.

    MSIL/Agent.QCZ popup alert may falsely declare to be deriving from a legislation enforcement establishment and also will report having situated kid pornography or other illegal data on the gadget. The alert will similarly include a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: F0F6B6B6md5: 1e85b89546a20fff16d6e5818e41398ename: 1E85B89546A20FFF16D6E5818E41398E.mlwsha1: 7dc656475cb874b7167b33c75df026cef2f71439sha256: 8ac08ae42fea37a638a391efa77dc5c1a78107e3704149df30ebc46fc43c609fsha512: b618f27f344895f3a4b22be1b08f4e861d0e77cbc8ed48f320b1545ac9373a166861dd4df8a9daea8d17d6f7cec8fc143f2bb456871e79c636a9a6661d2ca8fessdeep: 6144:01775Ox3h2E807XF+IRsFiN+wz9IfHkoIoi:CH5OH2EN7X1RsFigK9IPkgtype: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0LegalCopyright: Assembly Version: 0.0.0.0InternalName: installer_installcube.exeFileVersion: 0.0.0.0ProductVersion: 0.0.0.0FileDescription: OriginalFilename: installer_installcube.exe

MSIL/Agent.QCZ also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 700000121 )
Elastic malicious (high confidence)
DrWeb Trojan.Starter.4385
Cynet Malicious (score: 90)
ALYac Gen:Variant.Bulz.2198
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Backdoor:MSIL/Torwofun.2bb28b59
K7GW Trojan ( 700000121 )
Cybereason malicious.546a20
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Agent.QCZ
APEX Malicious
Avast Win32:Dropper-gen [Drp]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Bulz.2198
NANO-Antivirus Trojan.Win32.Blocker.dscqgo
MicroWorld-eScan Gen:Variant.Bulz.2198
Tencent Win32.Trojan.Blocker.Ebhl
Ad-Aware Gen:Variant.Bulz.2198
Sophos Mal/Generic-S
Comodo Malware@#123y4t9xa3za3
BitDefenderTheta Gen:NN.ZemsilF.34608.qm0@aayRQcj
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition GenericRXAL-SO!1E85B89546A2
FireEye Generic.mg.1e85b89546a20fff
Emsisoft Gen:Variant.Bulz.2198 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1129525
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Blocker
Arcabit Trojan.Bulz.D896
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Bulz.2198
AhnLab-V3 Trojan/Win32.Agent.R137323
McAfee GenericRXAL-SO!1E85B89546A2
MAX malware (ai score=86)
Panda Trj/CI.A
Rising Backdoor.Torwofun!8.E91 (CLOUD)
Yandex Trojan.Blocker!f9bl02hzVKQ
Ikarus Trojan.MSIL.Agent
Fortinet MSIL/Agent.QCZ!tr
AVG Win32:Dropper-gen [Drp]
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Generic.HgIASOoA

How to remove MSIL/Agent.QCZ 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.QCZ 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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