Written by Robert Bailey

What is Zusy.313821 infection?

In this article you will certainly discover about the meaning of Zusy.313821 and also its negative impact on your computer. Such ransomware are a form of malware that is elaborated by online scams to require paying the ransom by a victim.

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In the majority of the instances, Zusy.313821 infection will instruct its targets to start funds transfer for the function of counteracting the amendments that the Trojan infection has actually introduced to the victim’s device.

Zusy.313821 Summary

These modifications can be as complies with:

  • Executable code extraction;
  • Creates RWX memory;
  • Network activity detected but not expressed in API logs;
  • Anomalous binary characteristics;
  • Ciphering the documents located on the victim’s disk drive — so the target can no longer use the information;
  • Preventing normal access to the sufferer’s workstation;


One of the most common networks where Zusy.313821 Ransomware are injected are:

  • By methods of phishing emails;
  • As an effect of user ending up on a resource that organizes a harmful software;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the target’s computer or stop the gadget from functioning in a proper manner – while also putting a ransom money note that points out the requirement for the victims to impact the repayment for the purpose of decrypting the documents or restoring the documents system back to the preliminary problem. In a lot of instances, the ransom money note will certainly show up when the client reboots the PC after the system has already been harmed.

Zusy.313821 circulation channels.

In various edges of the world, Zusy.313821 expands by jumps and also bounds. Nonetheless, the ransom notes and also techniques of extorting the ransom money quantity might differ relying on certain regional (local) setups. The ransom money notes and methods of obtaining the ransom money quantity might differ depending on certain neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software.

    In particular areas, the Trojans frequently wrongfully report having spotted some unlicensed applications allowed on the victim’s gadget. The alert after that requires the customer to pay the ransom money.

    Faulty declarations regarding illegal material.

    In countries where software piracy is much less preferred, this approach is not as efficient for the cyber frauds. Conversely, the Zusy.313821 popup alert may incorrectly claim to be stemming from a law enforcement organization and also will report having situated child porn or various other prohibited information on the gadget.

    Zusy.313821 popup alert might incorrectly declare to be obtaining from a law enforcement establishment as well as will report having situated youngster pornography or various other illegal information on the tool. The alert will in a similar way contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 51692AB3
md5: a654b3a37c27810db180822b72ad6d3e
name: upload_file
sha1: d2d9484276a208641517a2273d96f34de1394b8e
sha256: 4c9e3ffda0e663217638e6192a093bbc23cd9ebfbdf6d2fc683f331beaee0321
sha512: 181027d766c0c206b4a66273bdc4df5efad3f205533eb1f8af8b01bb6d320d59c15515cd19e56f20c72476e07c1529a5a9b280bdfb57e197c3dd071077d4d4ba
ssdeep: 12288:YkPccFbStTCM6v/OZp3zBW+/JC9Sxk+XyosKkGyo+068/:YkPlFw1W+AMxLpsTGX+068
type: PE32 executable (DLL) (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Zusy.313821 also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Zusy.313821
McAfee RDN/Ransom
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Johnnie.4!c
CrowdStrike win/malicious_confidence_60% (D)
BitDefender Gen:Variant.Zusy.313821
K7GW Trojan ( 0056f6641 )
K7AntiVirus Trojan ( 0056f6641 )
Arcabit Trojan.Zusy.D4C9DD
Invincea Mal/Generic-S + Troj/Agent-BFPU
Cyren W32/Trojan.XDBC-6223
Symantec Trojan.Gen.2
ClamAV Win.Packed.Zusy-9770087-0
Alibaba Trojan:Win32/CryptInject.fdc459e7
NANO-Antivirus Trojan.Win32.Kryptik.hwtjqz
Ad-Aware Gen:Variant.Zusy.313821
Emsisoft Gen:Variant.Zusy.313821 (B)
Comodo Malware@#338f04fi3j3vs
F-Secure Trojan.TR/Crypt.Agent.AE
Zillya Trojan.Kryptik.Win32.2537203
TrendMicro Ransom.Win32.SEKHMET.E
McAfee-GW-Edition RDN/Ransom
FireEye Gen:Variant.Zusy.313821
Sophos Troj/Agent-BFPU
Webroot W32.Trojan.Gen
Avira TR/Crypt.Agent.AE
MAX malware (ai score=81)
Antiy-AVL Trojan/Win32.Generic
Microsoft Trojan:Win32/CryptInject!MSR
GData Gen:Variant.Zusy.313821
AhnLab-V3 Trojan/Win32.Cryptor.C4064147
ALYac Gen:Variant.Zusy.313821
TACHYON Trojan/W32.Agent.808960.BT
Malwarebytes Trojan.Crypt
Panda Trj/GdSda.A
ESET-NOD32 a variant of Win32/Kryptik.HGHT
TrendMicro-HouseCall Ransom.Win32.SEKHMET.E
Rising Trojan.Generic@ML.94 (RDML:SCIx+KS0RpH+9J4wwEpNqg)
Ikarus Trojan.Win32.Crypt
eGambit Unsafe.AI_Score_98%
Fortinet W32/Agent.BFPU!tr
BitDefenderTheta Gen:NN.ZedlaF.34282.XC4@am7K1yg
AVG Win32:CrypterX-gen [Trj]
Avast Win32:CrypterX-gen [Trj]
Qihoo-360 Generic/Trojan.8da

How to remove Zusy.313821 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 Zusy.313821 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 Zusy.313821 you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: http://gridinsoft.com/products/

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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