What is MSIL/Small.FA infection?

In this post you will discover regarding the definition of MSIL/Small.FA as well as its unfavorable influence on your computer system. Such ransomware are a form of malware that is specified by online fraudulences to demand paying the ransom money by a sufferer.

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In the majority of the cases, MSIL/Small.FA ransomware will advise its sufferers to initiate funds move for the function of neutralizing the modifications that the Trojan infection has presented to the sufferer’s tool.

MSIL/Small.FA Summary

These adjustments can be as adheres to:

  • 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.
  • 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 found on the victim’s hard disk — so the victim can no longer make use of the data;
  • Preventing regular access 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.


The most normal channels through which MSIL/Small.FA Trojans are injected are:

  • By ways of phishing emails;
  • As an effect of customer ending up on a source that holds a malicious software application;

As soon as the Trojan is effectively injected, it will either cipher the data on the target’s computer or prevent the device from working in an appropriate way – while also positioning a ransom money note that states the demand for the targets to impact the repayment for the purpose of decrypting the documents or recovering the documents system back to the initial condition. In most instances, the ransom note will come up when the client reboots the PC after the system has already been damaged.

MSIL/Small.FA circulation channels.

In various edges of the world, MSIL/Small.FA grows by jumps and bounds. Nevertheless, the ransom notes as well as techniques of obtaining the ransom money amount may differ relying on certain neighborhood (regional) settings. The ransom money notes as well as methods of obtaining the ransom quantity might vary depending on certain neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty alerts regarding unlicensed software.

    In certain locations, the Trojans commonly wrongfully report having actually discovered some unlicensed applications enabled on the target’s tool. The sharp then demands the customer to pay the ransom.

    Faulty declarations concerning prohibited web content.

    In countries where software application piracy is less preferred, this technique is not as efficient for the cyber fraudulences. Conversely, the MSIL/Small.FA popup alert may falsely declare to be deriving from a police establishment and also will certainly report having situated child pornography or other prohibited data on the gadget.

    MSIL/Small.FA popup alert might falsely assert to be obtaining from a law enforcement institution and also will certainly report having located youngster pornography or other prohibited information on the device. The alert will in a similar way consist of a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: DD69A38B
md5: 44f135acb3dc5162881fae1aca7622fa
name: 44F135ACB3DC5162881FAE1ACA7622FA.mlw
sha1: 06f3f01141e0a968642b25874f6d959a21888d87
sha256: 74b32fb9c90ed09ccd4f4eaf156c711a63d162b822a4d8f65be2ed6d4ec6f34d
sha512: 86939aaea9ad11a3d092ea0c38e7a3c827750596dc036bbc6c765d165bccae5d78b49262fb8154eed4c05b855b1ea305f536b9ffb83107c63dc654e20c64cecc
ssdeep: 384:TBlO01lcQ0L9A/cO5rL7I2W7Yc5t1MMl+Y:T+GX0OH7Ij15t6Ml1
type: PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright Microsoftxa9 2018
Assembly Version:
InternalName: Windows32.exe
CompanyName: Microsoft
ProductName: Windows32
FileDescription: Windows32
OriginalFilename: Windows32.exe

MSIL/Small.FA also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 005318051 )
Cynet Malicious (score: 85)
ALYac Gen:Variant.Bulz.371521
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_60% (D)
K7GW Trojan ( 005318051 )
Cybereason malicious.cb3dc5
Cyren W32/S-df4dae5e!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Small.FA
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.lajh
BitDefender Gen:Variant.Bulz.371521
NANO-Antivirus Trojan.Win32.Blocker.fceggt
MicroWorld-eScan Gen:Variant.Bulz.371521
Tencent Win32.Trojan.Blocker.Pezp
Ad-Aware Gen:Variant.Bulz.371521
Sophos Mal/Generic-S
Comodo Malware@#37edvsnkiialn
BitDefenderTheta Gen:NN.ZemsilF.34670.am0@aiXbTIg
McAfee-GW-Edition GenericRXFK-UM!44F135ACB3DC
FireEye Gen:Variant.Bulz.371521
Emsisoft Gen:Variant.Bulz.371521 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Dropper.MSIL.Gen
eGambit Unsafe.AI_Score_90%
Microsoft Trojan:Win32/Wacatac.B!ml
GData Gen:Variant.Bulz.371521
McAfee GenericRXFK-UM!44F135ACB3DC
MAX malware (ai score=94)
Panda Trj/GdSda.A
Rising Trojan.Small!8.A9 (CLOUD)
Ikarus Trojan.MSIL.Small
MaxSecure Trojan.Malware.74127610.susgen
Fortinet MSIL/Small.FA!tr
AVG Win32:Malware-gen

How to remove MSIL/Small.FA ransomware?

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 MSIL/Small.FA 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 MSIL/Small.FA you can always ask me in the comments for getting help.

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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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