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

What is Ransom:Win32/Natasa.A infection?

In this short article you will certainly find regarding the meaning of Ransom:Win32/Natasa.A as well as its negative influence on your computer. Such ransomware are a form of malware that is specified by on the internet scams to demand paying the ransom by a victim.

GridinSoft Anti-Malware Review
It is better to prevent, than repair and repent!
When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
Gridinsoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | 10% Off Coupon
Subscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

Most of the instances, Ransom:Win32/Natasa.A virus will certainly instruct its sufferers to initiate funds move for the objective of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s tool.

Ransom:Win32/Natasa.A Summary

These modifications can be as complies with:

  • Attempts to connect to a dead IP:Port (1 unique times);
  • A process attempted to delay the analysis task.;
  • 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.
  • Deletes its original binary from disk;
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Likely installs a bootkit via raw harddisk modifications;
  • Attempts to delete volume shadow copies;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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
  • Writes a potential ransom message to disk;
  • Creates a copy of itself;
  • Creates a known Satana ransomware decryption instruction / key file.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the papers found on the victim’s disk drive — so the victim can no more utilize the information;
  • Preventing normal 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.
Similar behavior
Related domains
z.whorecord.xyz Trojan.Ransom.Satan.A
a.tomx.xyz Trojan.Ransom.Satan.A


One of the most common channels whereby Ransom:Win32/Natasa.A Ransomware Trojans are infused are:

  • By methods of phishing emails;
  • As a repercussion of customer winding up on a resource that hosts a destructive software application;

As soon as the Trojan is efficiently infused, it will either cipher the data on the victim’s PC or protect against the device from functioning in a proper way – while additionally placing a ransom money note that discusses the demand for the victims to impact the payment for the function of decrypting the papers or bring back the file system back to the first condition. In the majority of circumstances, the ransom note will turn up when the client restarts the COMPUTER after the system has actually currently been damaged.

Ransom:Win32/Natasa.A circulation channels.

In different edges of the world, Ransom:Win32/Natasa.A expands by jumps and also bounds. However, the ransom notes and also methods of extorting the ransom amount may differ depending on particular regional (local) setups. The ransom notes as well as tricks of obtaining the ransom money amount might differ depending on particular local (regional) settings.

Ransomware injection

For example:

    Faulty alerts regarding unlicensed software program.

    In certain locations, the Trojans usually wrongfully report having spotted some unlicensed applications made it possible for on the target’s gadget. The sharp after that requires the customer to pay the ransom money.

    Faulty statements about prohibited content.

    In countries where software piracy is much less popular, this method is not as efficient for the cyber frauds. Additionally, the Ransom:Win32/Natasa.A popup alert might incorrectly declare to be stemming from a police establishment and will certainly report having situated kid porn or other illegal data on the device.

    Ransom:Win32/Natasa.A popup alert might incorrectly claim to be deriving from a regulation enforcement organization and also will report having situated kid porn or other prohibited information on the gadget. The alert will likewise include a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 637435AB
md5: 108756f41d114eb93e136ba2feb838d0
name: unpacked.mem
sha1: 8c6b51923ee7da2f4642c7717db95fbb77d96164
sha256: b38b4c1dcf6d6ecd1bbfc236b43c37c18044c2f42f11e5088384f4bd0751929c
sha512: d13183e8ba4689475b0cb3f5cc7acbfba34a1ba661eb5988984647c2bd3e561cfa03f6267f60ae9fb2ca0783f26c105cdbcfc89def598c48968febef23c21aaa
ssdeep: 768:F9NJK3qZRhxXHIQBsLL16BKc+bBQZ/UMc2:rXzXol6cc+lQZMMc2
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Natasa.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.FurtetasLTL.Trojan
MicroWorld-eScan Trojan.Ransom.Satan.A
CMC Trojan-Ransom.Win32.Satan!O
CAT-QuickHeal Ransom.Satana.A4
McAfee Trojan-FKOP!108756F41D11
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 004f30f61 )
BitDefender Trojan.Ransom.Satan.A
K7GW Trojan ( 004f30f61 )
Cybereason malicious.41d114
Arcabit Trojan.Ransom.Satan.A
TrendMicro Ransom_SATANA.D
Symantec Ransom.Cerber
ESET-NOD32 a variant of Win32/MBRlock.AO
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Satan.g
Alibaba Ransom:Win32/Satan.0efbedb2
NANO-Antivirus Trojan.Win32.Satan.elzbag
ViRobot Trojan.Win32.Ransom.35328.C
Rising Trojan.Ransom.Satan!1.AEB7 (CLASSIC)
Endgame malicious (high confidence)
Emsisoft Trojan.Ransom.Satan.A (B)
Comodo Malware@#28cp7kqsmdst2
F-Secure Trojan.TR/Crypt.XPACK.Gen
DrWeb Trojan.MBRlock.253
Zillya Trojan.MBRlock.Win32.423
Invincea heuristic
McAfee-GW-Edition BehavesLike.Win32.PWSOnlineGames.lz
Fortinet W32/Satan.A!tr.ransom
Trapmine malicious.high.ml.score
FireEye Generic.mg.108756f41d114eb9
Sophos Troj/Ransom-EZN
Ikarus Trojan.Win32.MBRlock
Jiangmin TrojanDownloader.Upatre.afkp
Webroot W32.Ransomware.Satana
MAX malware (ai score=100)
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft Ransom:Win32/Natasa.A
ZoneAlarm Trojan-Ransom.Win32.Satan.g
AhnLab-V3 Trojan/Win32.Satana.C1492908
Acronis suspicious
VBA32 TrojanDownloader.Upatre
ALYac Trojan.Ransom.Satan
TACHYON Trojan-Downloader/W32.Upatre.73728.E
Ad-Aware Trojan.Ransom.Satan.A
Malwarebytes Ransom.CryptoLocker
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_SATANA.D
Yandex Trojan.DL.Upatre!
SentinelOne DFI – Malicious PE
eGambit Generic.Malware
GData Trojan.Ransom.Satan.A
BitDefenderTheta Gen:NN.ZexaF.33558.eqZ@aaMBt4j
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Win32/Trojan.Downloader.26a

How to remove Ransom:Win32/Natasa.A virus?

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

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:

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 Ransom:Win32/Natasa.A 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 Ransom:Win32/Natasa.A you can always ask me in the comments for getting help.

User Review
0 (0 votes)
Comments Rating 0 (0 reviews)


  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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.

Leave a Reply