Written by Robert Bailey

What is Trojan:MSIL/FormBook.RV!MTB infection?

In this post you will find about the interpretation of Trojan:MSIL/FormBook.RV!MTB and also its unfavorable impact on your computer system. Such ransomware are a kind of malware that is specified by on the internet frauds to demand paying the ransom money by a sufferer.

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Most of the instances, Trojan:MSIL/FormBook.RV!MTB infection will certainly advise its targets to initiate funds transfer for the purpose of counteracting the changes that the Trojan infection has actually presented to the victim’s tool.

Trojan:MSIL/FormBook.RV!MTB Summary

These adjustments can be as adheres to:

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Ciphering the documents located on the target’s disk drive — so the sufferer can no longer make use of the information;
  • Preventing routine accessibility 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.

Related domains: Ransom.Win32.Wacatac.oa Ransom.Win32.Wacatac.oa


One of the most common channels where Trojan:MSIL/FormBook.RV!MTB Trojans are injected are:

  • By means of phishing e-mails;
  • As a repercussion of customer ending up on a source that organizes a malicious software application;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the data on the target’s computer or protect against the tool from operating in an appropriate way – while likewise placing a ransom note that mentions the demand for the sufferers to impact the settlement for the purpose of decrypting the papers or restoring the documents system back to the first problem. In many circumstances, the ransom money note will show up when the client restarts the COMPUTER after the system has currently been harmed.

Trojan:MSIL/FormBook.RV!MTB distribution networks.

In different corners of the globe, Trojan:MSIL/FormBook.RV!MTB grows by jumps and bounds. Nevertheless, the ransom money notes and techniques of obtaining the ransom quantity may differ depending on specific neighborhood (regional) setups. The ransom money notes as well as methods of extorting the ransom amount might differ depending on certain regional (local) settings.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software program.

    In particular locations, the Trojans usually wrongfully report having identified some unlicensed applications enabled on the victim’s gadget. The sharp after that demands the user to pay the ransom money.

    Faulty declarations concerning illegal content.

    In nations where software program piracy is much less preferred, this approach is not as reliable for the cyber fraudulences. Additionally, the Trojan:MSIL/FormBook.RV!MTB popup alert may wrongly claim to be originating from a law enforcement institution as well as will report having situated kid pornography or other prohibited information on the tool.

    Trojan:MSIL/FormBook.RV!MTB popup alert may wrongly claim to be deriving from a law enforcement organization and will certainly report having situated child pornography or other illegal information on the device. The alert will similarly contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 368624A7
md5: d4ecd2bd3d00a12dffcf55e006eb7b24
name: D4ECD2BD3D00A12DFFCF55E006EB7B24.mlw
sha1: 99b1322240a29fc6497493c903d179c55676c613
sha256: 750292519a4b694e981556bdaec9c5b568ac54f1b9cb52fc1f740cd45b2748ec
sha512: 31e79736b401f0434f1c71d7694e28989fb5881ad25673abe4893ae1d116a35e5316471d4fc6f96a4f8cd2b23075b3e437139c8e538e3849d8afafc9199ab546
ssdeep: 12288:1S1vESq2X+PijoECo42Y1e0LwXCsn5omlLGOUdbBHgctTa+UJvBswWr9PKAI:41x+PiMpgYUGwX7uOUdbBActAvTGP
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2019 Principle Pleasure
Assembly Version:
InternalName: COMServerEntry.exe
Comments: Principle Pleasure
ProductName: Record Bgy System
FileDescription: Record Bgy System
OriginalFilename: COMServerEntry.exe

Trojan:MSIL/FormBook.RV!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.Packed2.42808
MicroWorld-eScan Trojan.GenericKD.45544226
FireEye Trojan.GenericKD.45544226
Cylance Unsafe
Sangfor Malware
K7AntiVirus Trojan ( 005766571 )
BitDefender Trojan.GenericKD.45544226
K7GW Trojan ( 005766571 )
BitDefenderTheta Gen:NN.ZemsilF.34780.bn0@a04gFef
Cyren W32/MSIL_Kryptik.CTD.gen!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
Kaspersky HEUR:Trojan-Spy.MSIL.Noon.gen
Alibaba Trojan:Win32/Kryptik.ali2000016
ViRobot Trojan.Win32.Z.Kryptik.1077248.A
Ad-Aware Trojan.GenericKD.45544226
Emsisoft Trojan.Crypt (A)
Comodo Malware@#3iavdil6n383
F-Secure Trojan.TR/Spy.Noon.lloji
TrendMicro TROJ_FRS.0NA103AK21
Sophos Mal/Generic-S
SentinelOne Static AI – Malicious PE
Avira TR/Spy.Noon.lloji
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:MSIL/FormBook.RV!MTB
Gridinsoft Ransom.Win32.Wacatac.oa
Arcabit Trojan.Generic.D2B6F322
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan-Spy.MSIL.Noon.gen
GData Win32.Trojan-Stealer.FormBook.VRR8K7
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.MSILKrypt.R363618
ALYac Trojan.GenericKD.45544226
MAX malware (ai score=99)
Malwarebytes Trojan.MalPack.PNG.Generic
Panda Trj/GdSda.A
ESET-NOD32 a variant of MSIL/Kryptik.ZIU
TrendMicro-HouseCall TROJ_FRS.0NA103AK21
Tencent Msil.Trojan-spy.Noon.Wtds
Ikarus Trojan.MSIL.Inject
Fortinet MSIL/Kryptik.ZIU!tr
Webroot W32.Trojan.Gen
AVG Win32:PWSX-gen [Trj]
Avast Win32:PWSX-gen [Trj]
Qihoo-360 Generic/Trojan.Spy.beb

How to remove Trojan:MSIL/FormBook.RV!MTB 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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.

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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 Trojan:MSIL/FormBook.RV!MTB 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 Trojan:MSIL/FormBook.RV!MTB 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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