Trojan.Zonidel
Sarah Oconnell
Updated on February 19, 2026
What is Trojan.Zonidel infection?
In this article you will certainly discover concerning the definition of Trojan.Zonidel as well as its negative impact on your computer. Such ransomware are a form of malware that is elaborated by online scams to demand paying the ransom by a sufferer.
In the majority of the instances, Trojan.Zonidel infection will advise its victims to start funds transfer for the objective of counteracting the changes that the Trojan infection has actually introduced to the victim’s tool.
Trojan.Zonidel Summary
These modifications can be as complies with:
- Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
- Injection (inter-process);
- Injection (Process Hollowing);
- 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.
- A process attempted to delay the analysis task.;
- The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Executed a process and injected code into it, probably while unpacking;
- Attempts to stop active services;
- Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.The registry run keys perform the same action, and can be located in different locations:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- Creates a copy of itself;
- Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
- Ciphering the papers situated on the victim’s hard disk drive — so the victim can no longer utilize 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.
Trojan.Zonidel
The most regular networks where Trojan.Zonidel Ransomware Trojans are injected are:
- By ways of phishing e-mails;
- As a repercussion of individual ending up on a resource that hosts a destructive software program;
As soon as the Trojan is successfully infused, it will certainly either cipher the data on the sufferer’s PC or stop the tool from functioning in a correct fashion – while likewise positioning a ransom note that mentions the requirement for the targets to effect the payment for the objective of decrypting the papers or recovering the data system back to the preliminary condition. In most instances, the ransom note will certainly turn up when the client reboots the PC after the system has actually already been harmed.
Trojan.Zonidel circulation channels.
In different corners of the globe, Trojan.Zonidel grows by leaps and bounds. Nonetheless, the ransom notes and also tricks of obtaining the ransom money quantity may differ depending on certain neighborhood (regional) setups. The ransom notes and also tricks of extorting the ransom amount might vary depending on specific regional (regional) setups.
As an example:
Faulty signals regarding unlicensed software application.
In certain locations, the Trojans frequently wrongfully report having actually found some unlicensed applications allowed on the victim’s gadget. The sharp after that requires the user to pay the ransom money.
Faulty statements about illegal web content.
In nations where software application piracy is less preferred, this technique is not as efficient for the cyber scams. Additionally, the Trojan.Zonidel popup alert may wrongly assert to be originating from a police organization and also will report having situated youngster porn or various other illegal information on the tool.
Trojan.Zonidel popup alert may incorrectly assert to be acquiring from a legislation enforcement institution as well as will report having situated child porn or other prohibited information on the device. The alert will likewise contain a requirement for the customer to pay the ransom.
Technical details
File Info:
crc32: 231CDF21md5: 3fe8d04489f881ebf5fde0c7a9d44b21name: 3FE8D04489F881EBF5FDE0C7A9D44B21.mlwsha1: f8edae7048db6b3d4b6d39a01afece1029b46faasha256: 8c395f046801d51ed3a0aeefed363847e7623f838c02035240ff5722de4662efsha512: 2694a03605cbc127dfb7f6c9ea4d2bf45ed62d682437b4e80466ce6a406bc5d36a7ac6e2c410523ebbd6d34e132fddd59b1c5e7fe5b5578673d6ae45eecc6c35ssdeep: 3072:LA/tCd5i9cbVS4+fTW76Q3vi8DZrXVngX5KIjeaa8t880N306EMVFc+iD2:8Fi5BV5uW7vvi8BV5C7ae88i0bMsXtype: PE32 executable (GUI) Intel 80386, for MS WindowsVersion Info:
LegalCopyright: Copyright (C) 2017FileVersion: 1.0.0.1ProductVersion: 1.0.0.1Translation: 0x0809 0x04b0
Trojan.Zonidel also known as:
| GridinSoft | Trojan.Ransom.Gen |
| Bkav | W32.AIDetect.malware1 |
| K7AntiVirus | Trojan ( 0053305e1 ) |
| Elastic | malicious (high confidence) |
| DrWeb | Trojan.MulDrop7.56904 |
| ClamAV | Win.Trojan.Emotet-6415813-0 |
| CAT-QuickHeal | Trojan.Chapak.ZZ5 |
| McAfee | Trojan-FOSS!3FE8D04489F8 |
| Malwarebytes | Trojan.MalPack |
| Zillya | Trojan.Scar.Win32.108131 |
| Sangfor | Trojan.Win32.Save.a |
| CrowdStrike | win/malicious_confidence_100% (W) |
| K7GW | Trojan ( 0053305e1 ) |
| Cybereason | malicious.489f88 |
| Cyren | W32/S-72038380!Eldorado |
| Symantec | Packed.Generic.525 |
| ESET-NOD32 | a variant of Win32/Kryptik.GBCI |
| APEX | Malicious |
| Avast | Win32:Malware-gen |
| Cynet | Malicious (score: 100) |
| Kaspersky | HEUR:Trojan.Win32.Generic |
| BitDefender | Trojan.BRMon.Gen.3 |
| NANO-Antivirus | Trojan.Win32.Macrodrop.ewntkg |
| ViRobot | Trojan.Win32.U.GlobeImposter.236032 |
| SUPERAntiSpyware | |
| MicroWorld-eScan | Trojan.BRMon.Gen.3 |
| Tencent | Malware.Win32.Gencirc.10ba84da |
| Ad-Aware | Trojan.BRMon.Gen.3 |
| Sophos | Mal/Generic-S |
| Comodo | TrojWare.Win32.Jorik.A@7h097k |
| BitDefenderTheta | Gen:NN.ZexaF.34670.qu0@auLz@7li |
| VIPRE | Trojan.Win32.Generic!BT |
| TrendMicro | Ransom_HPGANDCRAB.SMG2 |
| McAfee-GW-Edition | BehavesLike.Win32.Generic.dc |
| FireEye | Generic.mg.3fe8d04489f881eb |
| Emsisoft | Trojan.BRMon.Gen.3 (B) |
| Jiangmin | Trojan.Scar.las |
| Avira | HEUR/AGEN.1102735 |
| Microsoft | Ransom:Win32/Gandcrab.SF!MTB |
| Arcabit | Trojan.BRMon.Gen.3 |
| AegisLab | Trojan.Win32.Purgen.tpFs |
| GData | Trojan.BRMon.Gen.3 |
| AhnLab-V3 | Trojan/Win32.RansomCrypt.R220586 |
| Acronis | suspicious |
| VBA32 | Trojan.Zonidel |
| MAX | malware (ai score=97) |
| Panda | Trj/Genetic.gen |
| TrendMicro-HouseCall | Ransom_HPGANDCRAB.SMG2 |
| Rising | (CLOUD) |
| SentinelOne | Static AI – Suspicious PE |
| eGambit | Unsafe.AI_Score_99% |
| Fortinet | W32/Kryptik.GBKU!tr |
| AVG | Win32:Malware-gen |
| Qihoo-360 | Win32/Ransom.GandCrab.HwoCPecA |
How to remove Trojan.Zonidel 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 Trojan.Zonidel 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 Trojan.Zonidel you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
