MSIL/Agent.RUK

What is MSIL/Agent.RUK infection?

In this article you will find about the meaning of MSIL/Agent.RUK as well as its adverse effect on your computer system. Such ransomware are a type of malware that is elaborated by on-line fraudulences to require paying the ransom by a victim.

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Most of the instances, MSIL/Agent.RUK infection will certainly advise its targets to initiate funds transfer for the objective of counteracting the amendments that the Trojan infection has actually presented to the target’s gadget.

MSIL/Agent.RUK Summary

These modifications can be as follows:

  • 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.
  • Starts servers listening on 127.0.0.1:0;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • 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
  • Attempts to modify Explorer settings to prevent file extensions from being displayed;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Ciphering the papers located on the sufferer’s hard disk drive — so the victim can no more make use of the information;
  • Preventing normal access to the sufferer’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.RUK

One of the most typical channels through which MSIL/Agent.RUK are infused are:

  • By methods of phishing emails;
  • As a consequence of individual winding up on a source that hosts a malicious software;

As soon as the Trojan is efficiently infused, it will either cipher the data on the sufferer’s PC or protect against the gadget from functioning in a proper fashion – while additionally putting a ransom money note that states the need for the victims to impact the repayment for the objective of decrypting the documents or restoring the data system back to the preliminary condition. In the majority of circumstances, the ransom money note will come up when the client reboots the PC after the system has currently been damaged.

MSIL/Agent.RUK circulation channels.

In numerous edges of the world, MSIL/Agent.RUK grows by jumps and also bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom quantity may vary depending upon certain neighborhood (local) settings. The ransom money notes as well as techniques of obtaining the ransom money quantity might vary depending on certain regional (local) setups.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software.

    In particular areas, the Trojans often wrongfully report having actually spotted some unlicensed applications made it possible for on the victim’s gadget. The alert after that demands the individual to pay the ransom.

    Faulty declarations concerning illegal material.

    In countries where software piracy is much less preferred, this approach is not as effective for the cyber scams. Conversely, the MSIL/Agent.RUK popup alert may wrongly claim to be originating from a police establishment as well as will report having located kid porn or other illegal information on the tool.

    MSIL/Agent.RUK popup alert may incorrectly assert to be acquiring from a legislation enforcement establishment and will certainly report having located 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: EE5ECB13
md5: 80ba125cb8b432b4054a658261cbb5b4
name: 80BA125CB8B432B4054A658261CBB5B4.mlw
sha1: 9f1d3d19d3dff01d716172b209cea419d2727fb5
sha256: 5a36f25a5e58e41dd9382a17606c5f5da3d995d71f5318c9364889d0271d571f
sha512: d659e52e5ad5f198bbbcf0c63e77ae87651ea2e39a2c62c97f86cd2f57426a083c37131aaf525cae55e41a114ff1675ef10fc25e7dbc73a77a43b48e2975e65e
ssdeep: 3072:8qbib6VsMiQZSq3s8sPDMlZ9e84EXjOAsHBxac3udZE:8439ZSqLsPUfmLudZ
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: 1.0.0.0
InternalName: services_running.sys.exe
FileVersion: 1.0.0.0
ProductName: Microsoft Windows Operating System
ProductVersion: 1.0.0.0
FileDescription: services_running
OriginalFilename: services_running.sys.exe

MSIL/Agent.RUK also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
Elastic malicious (high confidence)
DrWeb Trojan.Siggen7.23343
Cynet Malicious (score: 90)
ALYac Gen:Variant.Strictor.53154
Cylance Unsafe
Zillya Trojan.GenericKD.Win32.53511
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
K7GW Riskware ( 0040eff71 )
Cybereason malicious.cb8b43
Symantec W32.Golroted
ESET-NOD32 a variant of MSIL/Agent.RUK
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Ransom.Win32.Blocker.kbwe
BitDefender Gen:Variant.Strictor.53154
NANO-Antivirus Trojan.Win32.Fuery.epxngu
MicroWorld-eScan Gen:Variant.Strictor.53154
Tencent Win32.Trojan.Blocker.Dztq
Ad-Aware Gen:Variant.Strictor.53154
Sophos ML/PE-A
Comodo Malware@#2q15aaypfxbsb
BitDefenderTheta Gen:NN.ZemsilF.34670.lm0@aWs2FKl
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Artemis!Trojan
FireEye Generic.mg.80ba125cb8b432b4
Emsisoft Gen:Variant.Strictor.53154 (B)
SentinelOne Static AI – Malicious PE
Webroot W32.Blocker.Kbwe
Avira TR/Fuery.btkgo
eGambit Unsafe.AI_Score_99%
Microsoft Backdoor:Win32/Bladabindi!ml
GData Gen:Variant.Strictor.53154
McAfee Artemis!80BA125CB8B4
MAX malware (ai score=100)
VBA32 TrojanRansom.Blocker
Panda Trj/GdSda.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Blocker!tjh4Abs6q78
Ikarus Trojan-Spy.MSIL
Fortinet W32/Blocker.KBWE!tr
AVG Win32:Trojan-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HwMA0UcA

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

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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