MSIL:Rat-B [Trj]

Written by Robert Bailey

What is MSIL:Rat-B [Trj] infection?

In this post you will locate about the meaning of MSIL:Rat-B [Trj] and its unfavorable effect on your computer system. Such ransomware are a type of malware that is specified by online fraudulences to require paying the ransom by a target.

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Most of the cases, MSIL:Rat-B [Trj] infection will instruct its victims to initiate funds move for the purpose of neutralizing the modifications that the Trojan infection has actually presented to the target’s tool.

MSIL:Rat-B [Trj] Summary

These modifications can be as adheres to:

  • Injection (inter-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.
  • 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;
  • Deletes its original binary from disk;
  • A potential decoy document was displayed to the user;
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the sufferer’s hard disk drive — so the sufferer can no longer use the information;
  • Preventing routine accessibility 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.

MSIL:Rat-B [Trj]

The most typical channels where MSIL:Rat-B [Trj] Trojans are injected are:

  • By means of phishing e-mails;
  • As an effect of individual winding up on a source that holds a harmful software application;

As quickly as the Trojan is effectively infused, it will certainly either cipher the information on the sufferer’s computer or protect against the tool from operating in a correct fashion – while additionally positioning a ransom note that mentions the demand for the sufferers to effect the payment for the function of decrypting the documents or restoring the data system back to the first condition. In most instances, the ransom note will come up when the customer reboots the PC after the system has currently been damaged.

MSIL:Rat-B [Trj] distribution networks.

In various corners of the world, MSIL:Rat-B [Trj] expands by jumps and bounds. Nonetheless, the ransom notes as well as methods of obtaining the ransom amount may differ depending on certain local (local) setups. The ransom money notes and also techniques of extorting the ransom quantity might differ depending on particular local (local) setups.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software program.

    In certain areas, the Trojans often wrongfully report having identified some unlicensed applications enabled on the target’s gadget. The sharp after that demands the user to pay the ransom.

    Faulty declarations regarding illegal material.

    In nations where software piracy is much less preferred, this method is not as reliable for the cyber scams. Alternatively, the MSIL:Rat-B [Trj] popup alert might wrongly declare to be deriving from a police establishment and also will certainly report having situated youngster porn or other illegal data on the device.

    MSIL:Rat-B [Trj] popup alert may wrongly claim to be acquiring from a legislation enforcement institution and also will certainly report having situated child pornography or other unlawful information on the gadget. The alert will likewise have a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: DF154799
md5: 4449ae2ac43e338a8a853235df783d94
name: 4449AE2AC43E338A8A853235DF783D94.mlw
sha1: bfe0b8c6886a5c391742c7f13f637cb43aab25d0
sha256: 96550348444fc4af4daae5beb39d24a3215a48a03acc99a0714e28a5801f5a83
sha512: 97bbb02bfa8d543c62aa83752d0416e67df5eb0d0559af37ca948272fd051f788a84f3901268f9d7bc500199f7270729c339dbc8fb0de73af91300b7337249d5
ssdeep: 6144:TX6bPXhLApfplXMt0P+9wS0XG6tbSlqByb9Xyxfzng1306axQJx:7mhApjMtRmAqBa0zne306axG
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

MSIL:Rat-B [Trj] also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 004020ef1 )
Elastic malicious (high confidence)
DrWeb BackDoor.Comet.152
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.MsilFC.S19436557
ALYac Backdoor.Generic.755288
Cylance Unsafe
Sangfor Win.Malware.Generic-6623004-0
CrowdStrike win/malicious_confidence_80% (D)
Alibaba TrojanDropper:Win32/Blocker.02dff82c
K7GW Trojan ( 004020ef1 )
Cybereason malicious.ac43e3
Cyren W32/Agent.NXNL-3094
Symantec Trojan.Gen.MBT
ESET-NOD32 Win32/TrojanDropper.Agent.PYN
APEX Malicious
Avast MSIL:Rat-B [Trj]
ClamAV Win.Trojan.Generic-6295765-0
Kaspersky Trojan-Ransom.Win32.Blocker.hrft
BitDefender Backdoor.Generic.755288
NANO-Antivirus Trojan.Win32.Comet.haynlw
MicroWorld-eScan Backdoor.Generic.755288
Tencent Trojan-Ransom.Win32.Blocker.a
Ad-Aware Backdoor.Generic.755288
Sophos Mal/Generic-R
Comodo TrojWare.Win32.Agent.pyn@54cqtm
BitDefenderTheta AI:Packer.F31F52231E
VIPRE Trojan-Dropper.Win32.Effbee.a (v)
Emsisoft Backdoor.Generic.755288 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor/DarkKomet.kwk
Avira TR/Dropper.Gen
eGambit Trojan.Generic
Microsoft TrojanDropper:Win32/Effbee.A
ZoneAlarm Trojan-Ransom.Win32.Blocker.hrft
GData Win32.Trojan-Dropper.BeiF.A
AhnLab-V3 Trojan/Win32.OnlineGameHack.C122341
McAfee Artemis!4449AE2AC43E
MAX malware (ai score=80)
VBA32 Hoax.Blocker
Malwarebytes Generic.Trojan.Malicious.DDS
Panda Generic Suspicious
TrendMicro-HouseCall TSPY_TINCLEX.SM1
Rising Spyware.Agent!1.B1DD (CLOUD)
Yandex Trojan.GenAsa!N71EllaXIy8
Ikarus Trojan.MSIL.Agent
MaxSecure Trojan.Malware.121218.susgen
Fortinet W32/Dropper.PYN!tr
AVG MSIL:Rat-B [Trj]

How to remove MSIL:Rat-B [Trj] ransomware?

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:Rat-B [Trj] 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 MSIL:Rat-B [Trj] 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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