Backdoor.Crimson.RAT
Matthew Alvarez
Updated on April 29, 2026
What is Backdoor.Crimson.RAT infection?
In this short article you will locate about the definition of Backdoor.Crimson.RAT and its negative influence on your computer system. Such ransomware are a kind of malware that is elaborated by online frauds to demand paying the ransom by a target.
Most of the situations, Backdoor.Crimson.RAT virus will certainly instruct its sufferers to launch funds transfer for the function of reducing the effects of the amendments that the Trojan infection has actually introduced to the victim’s device.
Backdoor.Crimson.RAT Summary
These adjustments can be as follows:
- Attempts to connect to a dead IP:Port (2 unique times);
- 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.
- Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Ciphering the papers found on the target’s hard drive — so the target can no more use the data;
- 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.
Backdoor.Crimson.RAT
The most normal channels through which Backdoor.Crimson.RAT Trojans are infused are:
- By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
- As an effect of customer winding up on a resource that holds a harmful software;
As soon as the Trojan is effectively infused, it will either cipher the data on the sufferer’s PC or avoid the device from functioning in a correct way – while also placing a ransom note that points out the demand for the targets to impact the payment for the objective of decrypting the papers or bring back the data system back to the first problem. In many instances, the ransom note will show up when the client restarts the COMPUTER after the system has actually currently been harmed.
Backdoor.Crimson.RAT circulation networks.
In various corners of the globe, Backdoor.Crimson.RAT grows by jumps and bounds. Nonetheless, the ransom money notes and techniques of extorting the ransom amount may vary depending on certain local (local) settings. The ransom money notes and techniques of obtaining the ransom quantity may differ depending on certain local (regional) settings.
As an example:
Faulty notifies about unlicensed software program.
In certain areas, the Trojans commonly wrongfully report having actually spotted some unlicensed applications enabled on the sufferer’s tool. The alert after that requires the individual to pay the ransom money.
Faulty declarations regarding unlawful web content.
In nations where software program piracy is less prominent, this approach is not as effective for the cyber scams. Conversely, the Backdoor.Crimson.RAT popup alert might incorrectly assert to be deriving from a police institution and also will certainly report having located child pornography or other prohibited data on the device.
Backdoor.Crimson.RAT popup alert may incorrectly claim to be acquiring from a law enforcement institution and also will certainly report having located child porn or various other prohibited data on the device. The alert will in a similar way consist of a requirement for the user to pay the ransom money.
Technical details
File Info:
crc32: 28E6F977md5: 8fc5adbb6c01030f750c1ed8e913c876name: 8FC5ADBB6C01030F750C1ED8E913C876.mlwsha1: 9d08291418d88cde8774c67490aac09fd2df4d37sha256: 98894973a86aa01c4f7496ae339dc73b5e6da2f1dbcd5fe1215f70ea7b889b85sha512: 41362155e5c281aad410800bb48f99ab267c2f68765c23e0888b97b67255fba47aeadd2ddfc249fe8476b8128a84e847f183615a7a21d1462309ee2f46e0a0a5ssdeep: 1536:Dfo8yIWa3rfakcXr8fxosn4JDNWLsxVrFJUcmFX7v0:+h6u6DX7v0type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS WindowsVersion Info:
Translation: 0x0000 0x04b0LegalCopyright: Copyright xa9 2019Assembly Version: 1.0.0.0InternalName: thnaviwa.exeFileVersion: 1.0.0.0ProductName: thnaviwaProductVersion: 1.0.0.0FileDescription: thnaviwaOriginalFilename: thnaviwa.exe
Backdoor.Crimson.RAT also known as:
| GridinSoft | Trojan.Ransom.Gen |
| K7AntiVirus | Trojan ( 005393351 ) |
| Elastic | malicious (high confidence) |
| DrWeb | BackDoor.CrimsonNET.7 |
| Cynet | Malicious (score: 99) |
| ALYac | Trojan.Spy.MSIL.Crimson |
| Cylance | Unsafe |
| Sangfor | Trojan.Win32.Save.a |
| CrowdStrike | win/malicious_confidence_100% (W) |
| Alibaba | Backdoor:MSIL/CrimsonRat.ca4dab95 |
| K7GW | Trojan ( 005393351 ) |
| Cybereason | malicious.b6c010 |
| Cyren | W32/Crimson.A.gen!Eldorado |
| Symantec | Trojan.Scarimson!gm |
| ESET-NOD32 | a variant of MSIL/Agent.BNY |
| Avast | Win32:TrojanX-gen [Trj] |
| ClamAV | Win.Malware.Trojanx-7590330-0 |
| Kaspersky | HEUR:Trojan-Ransom.MSIL.Foreign.gen |
| BitDefender | Gen:Variant.MSILPerseus.213642 |
| NANO-Antivirus | Trojan.Win32.Generic.gsrsll |
| ViRobot | Backdoor.Win32.S.Crimson.10113536 |
| MicroWorld-eScan | Gen:Variant.MSILPerseus.213642 |
| Tencent | Win32.Trojan.Raasmd.Auto |
| Ad-Aware | Gen:Variant.MSILPerseus.213642 |
| Sophos | Mal/Generic-R + Troj/MSIL-NTX |
| Comodo | Malware@#1akdqj593rf4c |
| BitDefenderTheta | Gen:NN.ZemsilF.34688.@p0@amA2x9i |
| VIPRE | Trojan.Win32.Generic!BT |
| TrendMicro | Backdoor.Win32.CRIMSONRAT.C |
| McAfee-GW-Edition | Trojan-FSLY!8FC5ADBB6C01 |
| FireEye | Generic.mg.8fc5adbb6c01030f |
| Emsisoft | Gen:Variant.MSILPerseus.213642 (B) |
| SentinelOne | Static AI – Malicious PE |
| Jiangmin | Trojan.MSIL.nvcj |
| Webroot | W32.Trojan.Gen |
| Avira | HEUR/AGEN.1122521 |
| eGambit | Unsafe.AI_Score_97% |
| Microsoft | Backdoor:MSIL/CrimsonRat.A!MTB |
| GData | Gen:Variant.MSILPerseus.213642 |
| AhnLab-V3 | Malware/Win32.RL_Backdoor.C3653864 |
| McAfee | Trojan-FSLY!8FC5ADBB6C01 |
| MAX | malware (ai score=100) |
| VBA32 | TScope.Trojan.MSIL |
| Malwarebytes | Backdoor.Crimson.RAT |
| Panda | Trj/GdSda.A |
| TrendMicro-HouseCall | Backdoor.Win32.CRIMSONRAT.C |
| Rising | Backdoor.Crimson!1.CA75 (CLOUD) |
| Yandex | Trojan.Agent!wHzbSog/yHw |
| Ikarus | Trojan.MSIL.Agent |
| MaxSecure | Trojan.Malware.73715240.susgen |
| Fortinet | MSIL/Agent.BNY!tr |
| AVG | Win32:TrojanX-gen [Trj] |
| Paloalto | generic.ml |
How to remove Backdoor.Crimson.RAT virus?
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 Backdoor.Crimson.RAT 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 Backdoor.Crimson.RAT you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
