Written by Robert Bailey

What is TrojanSpy:MSIL/Yakbeex.B infection?

In this article you will certainly discover about the meaning of TrojanSpy:MSIL/Yakbeex.B and also its unfavorable impact on your computer. Such ransomware are a type of malware that is elaborated by online frauds to demand paying the ransom by a victim.

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Most of the cases, TrojanSpy:MSIL/Yakbeex.B ransomware will certainly advise its targets to launch funds move for the objective of counteracting the modifications that the Trojan infection has actually introduced to the victim’s tool.

TrojanSpy:MSIL/Yakbeex.B Summary

These alterations 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Executed a process and injected code into it, probably while unpacking;
  • Sniffs keystrokes;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Steals private information from local Internet browsers;
  • Exhibits behavior characteristic of Kibex Spyware/KeyBase 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
  • Creates a copy of itself;
  • Harvests credentials from local FTP client softwares;
  • Harvests information related to installed instant messenger clients;
  • Harvests information related to installed mail clients;
  • Ciphering the records located on the sufferer’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing routine access to the target’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 regular channels whereby TrojanSpy:MSIL/Yakbeex.B are injected are:

  • By methods of phishing emails;
  • As an effect of user ending up on a resource that hosts a harmful software application;

As quickly as the Trojan is effectively injected, it will certainly either cipher the data on the victim’s PC or avoid the tool from functioning in an appropriate manner – while additionally positioning a ransom money note that states the requirement for the targets to impact the payment for the function of decrypting the papers or restoring the documents system back to the initial problem. In a lot of circumstances, the ransom money note will turn up when the customer reboots the COMPUTER after the system has actually currently been damaged.

TrojanSpy:MSIL/Yakbeex.B circulation channels.

In different edges of the globe, TrojanSpy:MSIL/Yakbeex.B grows by jumps as well as bounds. Nevertheless, the ransom money notes as well as tricks of obtaining the ransom quantity might vary depending on certain neighborhood (regional) setups. The ransom notes and methods of extorting the ransom money quantity may differ depending on certain local (regional) setups.

Ransomware injection

For example:

    Faulty alerts regarding unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having identified some unlicensed applications allowed on the sufferer’s device. The alert then demands the user to pay the ransom.

    Faulty declarations regarding unlawful material.

    In countries where software program piracy is less preferred, this approach is not as reliable for the cyber scams. Alternatively, the TrojanSpy:MSIL/Yakbeex.B popup alert may incorrectly declare to be stemming from a police institution as well as will report having located youngster porn or other illegal information on the gadget.

    TrojanSpy:MSIL/Yakbeex.B popup alert may incorrectly assert to be acquiring from a legislation enforcement establishment as well as will report having situated kid porn or various other illegal information on the device. The alert will likewise have a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 4EF3208F
md5: 9ce35d95df405d46bd2dc8ad2c39d43e
name: 9CE35D95DF405D46BD2DC8AD2C39D43E.mlw
sha1: e7677addd00f191b60289fa7e03d82074f79f6c9
sha256: d1bda9f3b44d7edc259b1bd8e2c488d8e473536050633a4e4244230f8989344b
sha512: 5a44f00deb84978eb3892e0067c6f49ea0a9ac333d274d0b9d85fc9ada1639e347116b690a6beb0d75988b2ad14394c5f0e5782dc7239f1c52a99c478b969791
ssdeep: 12288:SxdA1BIdj/Ftx6/QV/Zxc0kim/XPZLTrXkx2H:odsIdj9bXLAiyFfXkx
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
Assembly Version:
InternalName: urmServer.exe
CompanyName: Appcelerator
Comments: This installer database contains the logic and data required to install Aptana Studio.
FileDescription: Aptana Studio
OriginalFilename: urmServer.exe

TrojanSpy:MSIL/Yakbeex.B also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Spyware ( 004b861a1 )
Elastic malicious (high confidence)
DrWeb Trojan.PWS.Siggen1.62918
ClamAV Win.Dropper.Razy-6561332-0
ALYac Gen:Variant.Kazy.599811
Malwarebytes Malware.AI.4140370037
Zillya Trojan.Blocker.Win32.37545
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
BitDefender Gen:Variant.Kazy.599811
K7GW Spyware ( 004b861a1 )
Cybereason malicious.5df405
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Spy.Agent.ADR
APEX Malicious
Cynet Malicious (score: 85)
Kaspersky Trojan-Ransom.Win32.Blocker.jxxc
Alibaba Trojan:Win32/Kryptik.ali2000016
NANO-Antivirus Trojan.Win32.BrowserThief.dztlwz
MicroWorld-eScan Gen:Variant.Kazy.599811
Tencent Win32.Trojan.Blocker.Hyjr
Ad-Aware Gen:Variant.Kazy.599811
Sophos Mal/Generic-S
Comodo Malware@#3k74iol6bvndv
BitDefenderTheta Gen:NN.ZemsilF.34628.Dm0@aafqC8g
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.gc
Emsisoft Gen:Variant.Kazy.599811 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1109459
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft TrojanSpy:MSIL/Yakbeex.B
Arcabit Trojan.Kazy.D92703
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Variant.Kazy.599811
McAfee GenericRXAY-OW!9CE35D95DF40
MAX malware (ai score=84)
VBA32 Hoax.Blocker
TrendMicro-HouseCall TSPY_KIBEX.SMXF
Rising Spyware.KeyBase!1.CC54 (CLOUD)
Ikarus Trojan-Spy.Agent
Fortinet MSIL/Agent.ADR!tr.spy
Panda Trj/GdSda.A
Qihoo-360 Win32/Trojan.086

How to remove TrojanSpy:MSIL/Yakbeex.B 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 TrojanSpy:MSIL/Yakbeex.B 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 TrojanSpy:MSIL/Yakbeex.B you can always ask me in the comments for getting help.

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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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