Written by Robert Bailey

What is Backdoor.NyanWorm infection?

In this short article you will certainly find regarding the meaning of Backdoor.NyanWorm and its unfavorable impact on your computer system. Such ransomware are a type of malware that is specified by on-line frauds to demand paying the ransom by a victim.

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In the majority of the situations, Backdoor.NyanWorm ransomware will advise its targets to launch funds move for the purpose of counteracting the amendments that the Trojan infection has introduced to the victim’s device.

Backdoor.NyanWorm Summary

These alterations can be as complies with:

  • Network activity detected but not expressed in API logs;
  • Ciphering the records situated on the target’s hard disk drive — so the sufferer can no more utilize the information;
  • Preventing normal access to the sufferer’s workstation;


One of the most typical networks through which Backdoor.NyanWorm are infused are:

  • By ways of phishing emails;
  • As a repercussion of customer winding up on a resource that hosts a malicious software;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the victim’s PC or avoid the tool from operating in a proper way – while likewise putting a ransom note that discusses the need for the victims to effect the repayment for the objective of decrypting the records or recovering the data system back to the initial problem. In most circumstances, the ransom money note will certainly turn up when the client restarts the PC after the system has currently been harmed.

Backdoor.NyanWorm distribution channels.

In various edges of the world, Backdoor.NyanWorm expands by leaps as well as bounds. Nevertheless, the ransom notes as well as techniques of extorting the ransom money amount may vary depending upon particular neighborhood (regional) setups. The ransom money notes as well as methods of obtaining the ransom money quantity might vary depending on particular local (regional) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software application.

    In specific locations, the Trojans frequently wrongfully report having actually found some unlicensed applications made it possible for on the target’s device. The alert then requires the user to pay the ransom.

    Faulty declarations regarding prohibited web content.

    In countries where software program piracy is less prominent, this approach is not as reliable for the cyber scams. Alternatively, the Backdoor.NyanWorm popup alert may incorrectly assert to be deriving from a police institution as well as will certainly report having located kid pornography or various other unlawful data on the tool.

    Backdoor.NyanWorm popup alert may wrongly declare to be deriving from a legislation enforcement institution as well as will certainly report having located kid porn or other unlawful information on the tool. The alert will likewise contain a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: E37496DE
md5: c57b851e15c5c96231facfea14d20b29
name: tmp0byx2juk
sha1: e82d0c6e62fcb4af4cbb7dd731ccb019a57898c4
sha256: f9f521f39967037f9abd81776c9713d20cfeb7f22869b8c569d5e1d210d64a31
sha512: dae63213ac16711b61b6393efb4d40490ff5318ec0b8f58bd0fe4627a979e6b6e8301a1edeb5232de5abdb28e9a1f80424e4f0440de2d3e70e403312ed4015c5
ssdeep: 768:ju0DVTBRlc6nWUbmelmo2qjrKjGKG6PIyzjbFgX3iDpr/Xo72BDZjx:ju0DVTBnck26KYDy3bCXS9w7Ydjx
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
Assembly Version:
InternalName: Stub.exe
OriginalFilename: Stub.exe

Backdoor.NyanWorm also known as:

GridinSoft Trojan.Ransom.Gen
MicroWorld-eScan Gen:Variant.Ransom.Samas.9
ALYac Gen:Variant.Ransom.Samas.9
Malwarebytes Backdoor.NyanWorm
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 005678321 )
BitDefender Gen:Variant.Ransom.Samas.9
K7GW Trojan ( 005678321 )
Invincea heuristic
F-Prot W32/MSIL_Troj.UP.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Agent.CFQ
APEX Malicious
ClamAV Win.Packed.Samas-7998113-0
Kaspersky HEUR:Backdoor.MSIL.Crysan.gen
Alibaba Backdoor:MSIL/Crysen.e33eed97
AegisLab Trojan.MSIL.Crysan.m!c
Ad-Aware Gen:Variant.Ransom.Samas.9
Emsisoft Gen:Variant.Ransom.Samas.9 (B)
Comodo Malware@#1hf4pef6s5ezm
F-Secure Trojan.TR/Dropper.Gen
DrWeb BackDoor.SiggenNET.5
Zillya Trojan.Agent.Win32.1334350
TrendMicro TROJ_GEN.R002C0DFL20
McAfee-GW-Edition GenericRXKL-LW!C57B851E15C5
MaxSecure Trojan.Malware.300983.susgen
Sophos Mal/Generic-S
Cyren W32/MSIL_Troj.UP.gen!Eldorado
Jiangmin Backdoor.MSIL.cxnh
Avira TR/Dropper.Gen
Fortinet MSIL/Agent.CFQ!tr
Antiy-AVL Trojan[Backdoor]/MSIL.Crysan
Endgame malicious (high confidence)
Arcabit Trojan.Ransom.Samas.9
ZoneAlarm HEUR:Backdoor.MSIL.Crysan.gen
Cynet Malicious (score: 85)
AhnLab-V3 Malware/Win32.RL_Generic.C3558490
McAfee GenericRXKL-LW!C57B851E15C5
MAX malware (ai score=87)
Cylance Unsafe
Panda Trj/GdSda.A
TrendMicro-HouseCall TROJ_GEN.R002C0DFL20
Tencent Msil.Backdoor.Crysan.Sxxz
SentinelOne DFI – Malicious PE
eGambit Unsafe.AI_Score_99%
GData MSIL.Backdoor.ASyncRAT.NA49ZB
BitDefenderTheta Gen:NN.ZemsilF.34128.cm0@aGr4yLk
AVG Win32:DropperX-gen [Drp]
Avast Win32:DropperX-gen [Drp]
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Generic/Backdoor.c00

How to remove Backdoor.NyanWorm 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 Backdoor.NyanWorm 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Backdoor.NyanWorm 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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