MSIL:Rat-B [Trj]
Rachel Ross
Updated on March 04, 2026
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.
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.
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: DF154799md5: 4449ae2ac43e338a8a853235df783d94name: 4449AE2AC43E338A8A853235DF783D94.mlwsha1: bfe0b8c6886a5c391742c7f13f637cb43aab25d0sha256: 96550348444fc4af4daae5beb39d24a3215a48a03acc99a0714e28a5801f5a83sha512: 97bbb02bfa8d543c62aa83752d0416e67df5eb0d0559af37ca948272fd051f788a84f3901268f9d7bc500199f7270729c339dbc8fb0de73af91300b7337249d5ssdeep: 6144:TX6bPXhLApfplXMt0P+9wS0XG6tbSlqByb9Xyxfzng1306axQJx:7mhApjMtRmAqBa0zne306axGtype: PE32 executable (GUI) Intel 80386, for MS WindowsVersion 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 |
| Baidu | Win32.Trojan-Dropper.Agent.ca |
| 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) |
| TrendMicro | TSPY_TINCLEX.SM1 |
| McAfee-GW-Edition | BehavesLike.Win32.Generic.gh |
| FireEye | Generic.mg.4449ae2ac43e338a |
| 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] |
| Paloalto | generic.ml |
How to remove MSIL:Rat-B [Trj] ransomware?
There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft">2.
Download GridinSoft Anti-Malware.
You can download GridinSoft Anti-Malware by clicking the button below:
Download GridinSoft Anti-MalwareRun 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.
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.
Press “Install” button.
Once installed, Anti-Malware will automatically run.
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.
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.
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 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.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
