What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Trojan:Win32/Swisyn infection?

In this post you will discover regarding the meaning of Trojan:Win32/Swisyn as well as its adverse effect on your computer system. Such ransomware are a type of malware that is specified by on-line fraudulences to demand paying the ransom by a target.

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Most of the cases, Trojan:Win32/Swisyn infection will certainly advise its sufferers to start funds move for the objective of counteracting the changes that the Trojan infection has introduced to the sufferer’s gadget.

Trojan:Win32/Swisyn Summary

These alterations can be as complies with:

  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • 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
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s disk drive — so the target can no more utilize the data;
  • Preventing routine accessibility to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most common channels whereby Trojan:Win32/Swisyn are injected are:

  • By means of phishing emails;
  • As a consequence of individual winding up on a source that hosts a malicious software;

As soon as the Trojan is successfully infused, it will certainly either cipher the data on the victim’s PC or avoid the device from operating in a proper way – while also positioning a ransom note that states the requirement for the targets to effect the settlement for the purpose of decrypting the records or restoring the file system back to the first problem. In the majority of circumstances, the ransom money note will certainly come up when the customer reboots the COMPUTER after the system has currently been harmed.

Trojan:Win32/Swisyn circulation networks.

In numerous corners of the globe, Trojan:Win32/Swisyn expands by leaps as well as bounds. Nevertheless, the ransom money notes and techniques of obtaining the ransom money quantity may differ depending upon particular regional (local) setups. The ransom notes and also tricks of extorting the ransom money quantity may differ depending on particular local (local) setups.

Ransomware injection

For instance:

    Faulty notifies regarding unlicensed software program.

    In certain areas, the Trojans often wrongfully report having actually detected some unlicensed applications allowed on the sufferer’s gadget. The sharp then requires the individual to pay the ransom.

    Faulty statements regarding unlawful web content.

    In countries where software program piracy is much less popular, this technique is not as effective for the cyber fraudulences. Alternatively, the Trojan:Win32/Swisyn popup alert might falsely claim to be deriving from a law enforcement organization as well as will report having located kid pornography or various other unlawful data on the tool.

    Trojan:Win32/Swisyn popup alert might wrongly assert to be deriving from a regulation enforcement establishment and will certainly report having located kid pornography or various other prohibited information on the device. The alert will similarly include a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: 4A39D272
md5: 21f0d4d45b45329747cc76023ed5220f
name: 21F0D4D45B45329747CC76023ED5220F.mlw
sha1: 663081394b7334b4856931a33802044ba1e7954a
sha256: acc62fc71414c7955e35e4c2db428234140699a44c209ef3c5edf639b190075f
sha512: ffb202b1219c2aca7dbc8d051d58964d1693d7343e8daf0fee355a28e001f23fa30ce450cee62b30eb59b96330900b746615088a4680b4862e2ed21e7031c45c
ssdeep: 12288:y2mF8c2yq20anKXV3618k0OAyHIhk3ulI/c/q:y2mFD272BwJ618k4yHIhkP
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

0: [No Data]

Trojan:Win32/Swisyn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 7000000f1 )
DrWeb Trojan.Siggen2.8347
Cynet Malicious (score: 99)
ALYac Gen:Variant.Doina.13269
Cylance Unsafe
Zillya Trojan.Blocker.Win32.62503
Sangfor Backdoor.Win32.Generic.519547
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Trojan:Win32/Blocker.c2f754b0
K7GW Trojan ( 7000000f1 )
Cybereason malicious.45b453
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Delf.PSD
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Swisyn-1106
Kaspersky Trojan-Ransom.Win32.Blocker.hjvt
BitDefender Gen:Variant.Doina.13269
NANO-Antivirus Trojan.Win32.Swisyn.cumlu
MicroWorld-eScan Gen:Variant.Doina.13269
Tencent Win32.Trojan.Blocker.Hryu
Sophos Mal/Generic-L
BitDefenderTheta AI:Packer.BE1F85A919
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition GenericR-KIZ!780D10B83F59
FireEye Gen:Variant.Doina.13269
Emsisoft Gen:Variant.Doina.13269 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Swisyn.gbo
Avira TR/Swisyn.A.3
Antiy-AVL Trojan/Generic.ASMalwS.150CE3
Kingsoft Win32.Malware.Heur_Generic.A.(kcloud)
Microsoft Trojan:Win32/Swisyn
Arcabit Trojan.Doina.D33D5
AegisLab Trojan.Win32.Swisyn.liR4
GData Gen:Variant.Doina.13269
TACHYON Trojan/W32.Swisyn.463039
McAfee Artemis!21F0D4D45B45
MAX malware (ai score=99)
VBA32 Trojan.Swisyn
Panda Trj/CI.A
TrendMicro-HouseCall TROJ_GEN.USEKB25
Rising Downloader.Delf!8.16F (TFE:5:eBl57tAOCgR)
Yandex Trojan.GenAsa!RHMxStlWIpw
Ikarus Trojan.Win32.Swisyn
Fortinet W32/Swisyn.AOGD!tr
AVG Win32:Malware-gen

How to remove Trojan:Win32/Swisyn virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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 Trojan:Win32/Swisyn 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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If the guide doesn’t help you to remove Trojan:Win32/Swisyn you can always ask me in the comments for getting help.

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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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