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

What is Trojan.Small infection?

In this article you will find regarding the meaning of Trojan.Small as well as its adverse effect on your computer. Such ransomware are a type of malware that is specified by on-line scams to require paying the ransom by a victim.

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In the majority of the cases, Trojan.Small ransomware will certainly advise its targets to launch funds move for the objective of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s device.

Trojan.Small Summary

These adjustments can be as adheres to:

  • Possible date expiration check, exits too soon after checking local time;
  • A process created a hidden window;
  • 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.
  • Performs some HTTP requests;
  • Uses Windows utilities for basic functionality;
  • A system process is generating network traffic likely as a result of process injection;
  • 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.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Creates a slightly modified copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files found on the victim’s hard drive — so the target can no more use the data;
  • Preventing regular access 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.
Similar behavior
Related domains BScope.TrojanRansom.Blocker BScope.TrojanRansom.Blocker


The most regular channels through which Trojan.Small Ransomware Trojans are injected are:

  • By ways of phishing e-mails;
  • As an effect of individual winding up on a source that organizes a harmful software program;

As quickly as the Trojan is successfully injected, it will certainly either cipher the data on the victim’s computer or prevent the gadget from functioning in a proper way – while also putting a ransom money note that states the requirement for the sufferers to effect the repayment for the function of decrypting the documents or bring back the file system back to the first condition. In the majority of circumstances, the ransom note will certainly come up when the customer restarts the PC after the system has actually currently been damaged.

Trojan.Small distribution networks.

In numerous edges of the world, Trojan.Small expands by jumps as well as bounds. However, the ransom money notes and also techniques of extorting the ransom money quantity might vary depending on particular neighborhood (local) setups. The ransom money notes and tricks of obtaining the ransom quantity may vary depending on certain neighborhood (local) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software.

    In particular areas, the Trojans typically wrongfully report having identified some unlicensed applications allowed on the victim’s device. The sharp then demands the individual to pay the ransom.

    Faulty statements about illegal web content.

    In countries where software program piracy is much less popular, this approach is not as reliable for the cyber frauds. Conversely, the Trojan.Small popup alert might falsely assert to be originating from a law enforcement establishment and also will report having located youngster pornography or various other illegal data on the device.

    Trojan.Small popup alert may wrongly assert to be obtaining from a legislation enforcement establishment and also will report having situated youngster porn or other illegal data on the tool. The alert will in a similar way have a demand for the user to pay the ransom.

Technical details

File Info:

crc32: C6BA3CDF
md5: d5943411b909966b478186bed9a9d90d
name: D5943411B909966B478186BED9A9D90D.mlw
sha1: 01fbad30b1a833e6f6b609af35afe9ab4360fd58
sha256: 998f410c4792fe36fc58d1c7c8af5551516bd116a38e022da4e79aef52692b48
sha512: d8ee34c0e801631d138cef92524c7633ee982561310e23738a519c028fa63188ce6349719ca077a29ae67af5729d16e51e375b5ce83d48e1efc9945c307e0795
ssdeep: 6144:plPfgjBRewu2+VkDawnJOHbN3OnxrmU84rGe7ZSWIBjAc1xTbf:HfgVRHu2rodU84rGe7ZSWIBdxTbf
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xffa9 Microsoft Corporation. All rights reserved.
InternalName: SessMgr.exe
FileVersion: 5.1.2600.5512
CompanyName: Microsoft Corporation
PrivateBuild: SessMgr.exe
LegalTrademarks: xffa9 Microsoft Corporation. All rights reserved.
ProductName: Microsoftxffae Windowsxffae Operating System
SpecialBuild: 5.1.2600.5512
ProductVersion: 5.1.2600.5512
FileDescription: Microsoftxffae Remote Desktop Help Session Manager
OriginalFilename: SessMgr.exe
Translation: 0x0409 0x04b0

Trojan.Small also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004e42231 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Small.gen
ALYac Gen:Trojan.Malware.xu0@aWJ!6Zii
Cylance Unsafe
Zillya Trojan.Rodecap.Win32.1691
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 004e42231 )
Cybereason malicious.1b9099
Cyren W32/SmallDl.F.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Rodecap.BB
APEX Malicious
Avast Win32:MalwareX-gen [Trj]
BitDefender Gen:Trojan.Malware.xu0@aWJ!6Zii
NANO-Antivirus Trojan.Win32.Small.fdmqsc
MicroWorld-eScan Gen:Trojan.Malware.xu0@aWJ!6Zii
Tencent Malware.Win32.Gencirc.10b56177
Ad-Aware Gen:Trojan.Malware.xu0@aWJ!6Zii
Sophos Mal/Generic-R + Mal/Qbot-P
Comodo TrojWare.Win32.Agent.AWR@4ri3wg
BitDefenderTheta Gen:NN.ZexaF.34688.xu0@aWJ!6Zii
VIPRE Trojan.Win32.Small.bhm (v)
McAfee-GW-Edition BehavesLike.Win32.Generic.fh
Emsisoft Gen:Trojan.Malware.xu0@aWJ!6Zii (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Rogue.Gen
Avira TR/Small.bhoumd
Kingsoft Heur.SSC.2805067.1216.(kcloud)
Microsoft Trojan:Win32/Small.BH
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Trojan.Malware.xu0@aWJ!6Zii
AhnLab-V3 Trojan/Win32.Blocker.R52075
Acronis suspicious
McAfee Downloader-FKE!D5943411B909
MAX malware (ai score=100)
VBA32 BScope.TrojanRansom.Blocker
Malwarebytes Malware.AI.408324201
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_RODECAP.SMO
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Agent!qZ0N66Hw+9g
Ikarus Trojan.Win32.Small
Fortinet W32/Rodecap.BBC!tr
AVG Win32:MalwareX-gen [Trj]

How to remove Trojan.Small 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 Trojan.Small 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 Trojan.Small 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

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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