Trojan.Winlock
Daniel Foster
Updated on April 18, 2026
What is Trojan.Winlock infection?
In this post you will certainly find concerning the definition of Trojan.Winlock as well as its adverse effect on your computer. Such ransomware are a form of malware that is clarified by on-line scams to require paying the ransom money by a victim.
In the majority of the cases, Trojan.Winlock infection will certainly advise its sufferers to launch funds move for the objective of neutralizing the changes that the Trojan infection has actually presented to the target’s gadget.
Trojan.Winlock Summary
These modifications can be as follows:
- 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.
- Expresses interest in specific running processes;
- Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
- Unconventionial language used in binary resources: Russian;
- 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 hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
- 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.
- Attempts to modify Explorer settings to prevent hidden files from being displayed;
- Ciphering the documents found on the victim’s hard disk — so the target can no longer use the data;
- Preventing routine accessibility to the sufferer’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.Winlock
The most typical channels through which Trojan.Winlock Ransomware Trojans are injected are:
- By methods of phishing emails;
- As a consequence of individual winding up on a source that organizes a malicious software application;
As quickly as the Trojan is effectively infused, it will certainly either cipher the data on the target’s PC or prevent the device from working in a correct fashion – while likewise positioning a ransom money note that mentions the demand for the sufferers to impact the settlement for the purpose of decrypting the records or bring back the data system back to the preliminary condition. In a lot of circumstances, the ransom money note will certainly come up when the client reboots the PC after the system has currently been damaged.
Trojan.Winlock distribution networks.
In different edges of the world, Trojan.Winlock expands by leaps and bounds. Nonetheless, the ransom money notes as well as tricks of obtaining the ransom quantity may differ depending on particular neighborhood (local) setups. The ransom notes as well as techniques of obtaining the ransom money amount might differ depending on certain local (regional) setups.
As an example:
Faulty signals concerning unlicensed software.
In specific locations, the Trojans frequently wrongfully report having spotted some unlicensed applications allowed on the target’s device. The sharp then requires the individual to pay the ransom money.
Faulty statements concerning unlawful content.
In countries where software application piracy is much less prominent, this approach is not as effective for the cyber scams. Alternatively, the Trojan.Winlock popup alert might falsely declare to be stemming from a police establishment and will report having situated kid porn or other illegal information on the device.
Trojan.Winlock popup alert may wrongly assert to be obtaining from a regulation enforcement organization and also will certainly report having situated child pornography or other prohibited data on the device. The alert will likewise consist of a need for the user to pay the ransom.
Technical details
File Info:
crc32: 67D8F4D2md5: 11742fc7c49f47b0c68d1160f5a64db6name: antivirus.exesha1: 7d2d28cce3096973837095062c9cf8624705e14bsha256: 3737d6f26d68547130c3e0e26e2f39da58969aa3edd3dd51582d8ee16decb462sha512: 51bf37c93ec41335ac61074afab37e41a38541585a114410b7a80ab55beddcc7ee869f18fc0c1055356ea5d458829da995a0c895649e69674a909e34702d131fssdeep: 6144:4Ly84u9nSO2GjZkD10BIY3rb1YfBdfpoZ3u/Ht52w6JSeiFPXRo692:M+u9nx2GjMY3XKfd/H/9Pm692type: PE32 executable (GUI) Intel 80386, for MS WindowsVersion Info:
0: [No Data]
Trojan.Winlock also known as:
| GridinSoft | Trojan.Ransom.Gen |
| Bkav | W32.BitwanX.Trojan |
| MicroWorld-eScan | Trojan.Generic.5848174 |
| CMC | Trojan-Ransom.Win32.Fullscreen!O |
| CAT-QuickHeal | Ransom.Weenloc.A8 |
| McAfee | Trojan-FAZX!11742FC7C49F |
| Cylance | Unsafe |
| AegisLab | Trojan.Win32.Blocker.4!c |
| TheHacker | Trojan/Fullscreen.jo |
| BitDefender | Trojan.Generic.5848174 |
| K7GW | Trojan ( 0039911e1 ) |
| K7AntiVirus | Trojan ( 0039911e1 ) |
| Arcabit | Trojan.Generic.D593C6E |
| Invincea | heuristic |
| Baidu | Win32.Trojan.LockScreen.b |
| NANO-Antivirus | Trojan.Win32.Fullscreen.crnep |
| F-Prot | W32/Trojan2.OAEZ |
| Symantec | Trojan.Ransomlock |
| TotalDefense | Win32/Ransom.PC |
| TrendMicro-HouseCall | Ransom_WINLOCK.SM |
| Avast | Win32:LockScreen-AHV [Trj] |
| ClamAV | Win.Trojan.Fullscreen-41 |
| GData | Trojan.Generic.5848174 |
| Kaspersky | Trojan-Ransom.Win32.Blocker.jzec |
| Alibaba | Ransom:Win32/Blocker.5dc6551a |
| ViRobot | Trojan.Win32.A.ChameleonUnlicence.383298 |
| Rising | Trojan.Win32.Weenloc.a (CLOUD) |
| Ad-Aware | Trojan.Generic.5848174 |
| Emsisoft | Trojan.Generic.5848174 (B) |
| Comodo | TrojWare.Win32.Ransom.Fullscreen.fgt@4t6ar8 |
| F-Secure | Trojan.Generic.5848174 |
| DrWeb | Trojan.Winlock.3333 |
| Zillya | Trojan.Fullscreen.Win32.35 |
| TrendMicro | Ransom_WINLOCK.SM |
| McAfee-GW-Edition | BehavesLike.Win32.Generic.gh |
| Trapmine | malicious.high.ml.score |
| Sophos | Mal/Ransom-AI |
| SentinelOne | static engine – malicious |
| Cyren | W32/Trojan.GDVD-7096 |
| Webroot | W32.Trojan.Fullscreen.Gen |
| Avira | TR/ATRAPS.Gen |
| MAX | malware (ai score=100) |
| Antiy-AVL | Trojan[Ransom]/Win32.PornoAsset.cioy |
| Kingsoft | Win32.Troj.Undef.(kcloud) |
| Microsoft | Ransom:Win32/Weenloc.A |
| Endgame | malicious (high confidence) |
| SUPERAntiSpyware | |
| ZoneAlarm | Trojan-Ransom.Win32.Blocker.jzec |
| AhnLab-V3 | Trojan/Win32.Atraps.R214152 |
| VBA32 | TScope.Trojan.Delf |
| ALYac | Trojan.Generic.5848174 |
| Malwarebytes | Trojan.Winlock |
| Panda | Generic Malware |
| Zoner | Trojan.Win32.46437 |
| ESET-NOD32 | Win32/LockScreen.AGU |
| Tencent | Trojan-Ransom.Win32.Blocker.jzec |
| Yandex | Trojan.Birele!80zSwSVb1XI |
| Ikarus | Trojan-Ransom.Win32.Birele |
| Fortinet | W32/LockScreen.AGU!tr |
| AVG | Win32:LockScreen-AHV [Trj] |
| Cybereason | malicious.7c49f4 |
| Paloalto | generic.ml |
| CrowdStrike | malicious_confidence_100% (W) |
| Qihoo-360 | Trojan.Generic |
How to remove Trojan.Winlock ransomware?
The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.">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.Winlock 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.Winlock you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
