THREAT REMOVAL

.stn File Virus Restore Files (Satan 2 Ransomware)

This article is created to help you remove the 2nd version of Satan ransomware from your computer and restore .stn files encrypted by this ransomware.

A new version of Satan ransomware, detected out in the wild was released. The virus was first detected back in January the 19th and was reported to use Tor networking for the ransom instructions and payoff. This version uses directly leaves the e-mails stn_satan@aol.com or Satan-Stn@bitmessage.ch in it’s ransom note, named “0_HELP_DECRYPT_FILES.html” in which it demands 1 bitcoin to be paid in 24 hours otherwise the sum will double. In case you have become a victim of the .stn file virus, recommendations are to read this article thoroughly.

SensorsTechForum team is currently performing an ongoing investigation on Satan 2 ransomware. Expect an update on this article.

Threat Summary

Name.stn File Virus
TypeRansomware
Short DescriptionThe ransomware is put on the Web as a service (RaaS). It is also free to use, while it requires only a registration.
SymptomsThe ransomware encrypts files and will place the same .stn extension to all files after encryption finishes. Also drops a ransom note, named 0_HELP_DECRYPT_FILES.html.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware

Download

Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .stn File Virus.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

Satan 2 Ransomware – How Does It Infect

The infection process of Satan ransomware is no different than the first version. The virus still uses spam e-mail messages with instructions in them to open the attachments, just like the example image below displays:

In the attachment there may be a document portrayed by the e-mail message to be an important invoice or other type of document that should be opened right away.

Besides spam mail, there may be multiple other methods via which this ransomware infection could be replicated and one of them Is if the infection has embedded loader that appears like a game patch, program legitimizing software or a fake setup of software. Such are usually uploaded online on suspicious websites or via hacked account on torrent websites.

Whatever the scenario, once the user opens the malicious file, the payload of the Satan 2 ransomware is dropped on the computer of the user. It consists of the following files:

→ 0_HELP_DECRYPT_FILES.html
Ransomware.exe
Ransomware3.exe
Ransom.exe

.stn File Virus – Malicious Activity

The activity of the .stn ransomware involves multiple different actions, the first of which may be to delete the shadow volume copies on the infected computer. For this, the following commands in Windows Command Prompt are likely used:

→ process call create “cmd.exe /c
vssadmin.exe delete shadows /all /quiet
bcdedit.exe /set {default} recoveryenabled no
bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures

After this, the Satan 2 ransomware may begin to interfere with the Windows Registry editor, more specifically set multiple different malicious files to run when Windows starts up. This is achievable by modifying the following Windows registry sub-keys:

→ 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

In addition to this, the Satan ransomware variant using the .stn extension may also shut down or interfere with multiple critical Windows objects, like the following:

→ KERNEL32.dll
ADVAPI32.DLL

.stn File Virus – Encryption Activity

For the encryption process, this iteration of Satan Ransomware may use the AES-256 and RSA-2048 encryption algorithms. The AES cipher may be employed in order to encrypt the files themselves, generating symmetric decryption key. The RSA cipher then may be additionally employed to generate a public key assigned to the user and embed it within the files.


Image Source: Wikipedia

Satan 2 ransomware is believed to scan for and look for the following file types to encrypt:

→ .incpas, .mp4, .pab, .st6, .sas7bdat, .wmv, .backup, .drf, .ibank, .3ds, .odg, .cer, .tif, .cs, .dotx, .7z, .png, .bak, .ibz, .db3, .pbl, .3fr, .dxf, .nk2, .bkp, .mdf, .svg, .xlm, .3dm, .pct, .java, .pot, .sxi, .ibd, .sxw, .pspimage, .ppt, .kbx, .ppsm, .ndd, .txt, .pdb, .say, .backupdb, .fla, .swf, .asx, .accdt, .mp3, .ycbcra, .erf, .cr2, .pfx, .potx, .qby, .sqlite, .blend, .class, .pat, .odp, .gray, .qbw, .tib, .thm, .htm, .mos, .rm, .key, .std, .tlg, .lua, .pst, .sqlitedb, .grey, .cdr4, .dc2, .ce1, .ps, .tex, .eml, .xlam, .pages, .st8, .jar, .st7, .potm, .sdf, .db-journal, .pcd, .aspx, .rwl, .kpdx, .fmb, .xlr, .gry, .kc2, .oil, .moneywell, .xlk, .sti, .accdr, .oth, .c, .xml, .nd, .mdb, .pem, .erbsql, .bpw, .ffd, .ost, .pptm, .dwg, .zip, .qbm, .cdx, .des, .dng, .pdd, .cfp, .nyf, .cgm, .sldm, .xla, .odf, .raf, .crw, .mef, .raw, .x11, .nsd, .fff, .design, .dcs, .ptx, .al, .ns2, .bik, .back, .accdb, .nwb, .cpi, .ads, .odt, .sqlite3, .docm, .drw, .pl, .nx2, .fpx, .rdb, .otp, .msg, .accde, .agdl, .php, .csv, .py, .rtf, .ach, .sda, .ddd, .asf, .dotm, .cmt, .h, .hbk, .xlsx, .s3db, .tga, .wav, .iif, .dxb, .sql, .db, .sd0, .bgt, .djvu, .jpg, .doc, .craw, .mpg, .sxd, .kdc, .jpeg, .psafe3, .flac, .dtd, .act, .qba, .vob, .cdrw, .eps, .bkf, .mdc, .rar, .mov, .cdf, .m4v, .ab4, .bank, .pps, .cib, .dot, .dgc, .exf, .flv, .xlsb, .ddrw, .adb, .srw, .plc, .csh, .xls, .fxg, .otg, .pas, .xlt, .indd, .rwz, .xltx, .apj, .stw, .xltm, .orf, .ott, .qbb, .max, .cls, .obj, .docx, .dcr, .cdr3, .qbx, .pdf, .nef, .ots, .srt, .ddoc, .rat, .phtml, .m, .dbx, .nxl, .avi, .p12, .awg, .dbf, .ns3, .mmw, .prf, .wallet, .rw2, .jin, .odc, .qbr, .ppsx, .ns4, .wpd, .wps, .nsh, .dxg, .fhd, .dac, .wb2, .nrw, .odb, .ait, .jpe, .odm, .sldx, .fdb, .acr, .war, .oab, .sxc, .cpp, .r3d, .hpp, .asm, .st5, .stx, .xis, .dds, .xlsm, .p7c, .cdr5, .3g2, .mrw, .sr2, .html, .cdr, .idx, .st4, .bdb, .kdbx, .nsg, .der, .ods, .myd, .nop, .ppam, .pptx, .yuv, .xlw, .mfw, .nsf, .csl, .php5, .p7b, .crt, .asp, .srf, .jsp, .cdr6, .sxm, .iiq, .3gp, .ce2, .arw, .bay, .ai, .sxg, .psd, .3pr, .fh, .pef, .x3f, .sik, .bpp, .vmdk, .spi, .bup, .cvt, .bb, .fkc, .tjl, .dbk, .swp, .fb, .vib, .dtb, .bke, .old, .bkc, .jou, .rpb, .abk, .sav, .bkn, .tbk, .fbw, .vrb, .spf, .bk, .sbk, .umb, .ac, .vbk, .wbk, .mbk

After the encryption process by Satan ransomware has completed, the ransomware infection appends the .stn file extension to the files encrypted by it. The files appear like the following:


Source: Affected user

In addition to this, the ransom note of the ransomware is also dropped on the computer of the victim, this time directly directing the victim to pay the BitCoin address, instead of utilizing the Tor network for the ransom payoff:

Ransom note’s content:

What happened to my files ?
All of your personal files were encrypted using AES-256 and RSA-2048
Your personal ID

{custom key}

What does this mean ?
This means that the content of your files have been changed, you will not be able to use them, it is basically the same as losing them forever. However, you can still get them back with our help.
How can I get my files back ?
As said before, your files have been encrypted, in order to decrypt them, you’ll need the private key of the key pair that was generated when your files were encrypted. Decrypting your files is only possible with the private key and the decrypter.
To get the decryptеr you should:
pay for decrypt:
to send 1 bitcoin today (tomorrow 2 bitcoins) to bitcoin the address 1Nez7W9ashFL4BA7vHuA5aoaad9XtqHKCF
Here are our recommendations:

If you have no Bitcoin address register https://blockchain.info/wallet
fill up your wallet some of the ways:
Btcdirect.eu – Good service for Europe
Bittylicious.com – Bitcoins through Visa / MC or through SEPA (ЕС) transfer
Localbitcoins.com – Here you can find people who want to sell Bitcoins directly (WU, in cash, SEPA, Paypal u.s.).
Cex.io – buy bitcoins with Visa / Mastercard or Wire Transfer.
Coincafe.com – Designed for quick and easy service. Payment methods: Western Union, Bank of America, cash by FedEx, Moneygram, as money transfer
Bitstamp.net – well known and established Bitcoins seller
Coinmama.com – Visa / Mastercard
Btc-e.com – Bitcoins vendor (Visa / Mastercard, etc.)
If you have not found any bitcoins in your region, try to find them here:
Buybitcoinworldwide.com – International Bicoins Exchange Directory
Bitcoin-net.com – Another directory of Bitcoins sellers
Howtobuybitcoins.info – International Bicoins Exchange Directory
Bittybot.co/eu – Directory for countries of the European Union
write to Google how to buy Bitcoin in your country?

mail support stn_satan@aol.com or Satan-Stn@bitmessage.ch:
After the payment:

Send screenshot of payment to mail support stn_satan@aol.com or Satan-Stn@bitmessage.ch. In the letter include your personal ID (look at the beginning of this document).
After you will receive a decryptor and instructions
Attention!

No Payment = No decryption
You really get the decryptor after payment
Do not attempt to remove the program or run the anti-virus tools
Attempts to self-decrypting files will result in the loss of your data
Decoders other users are not compatible with your data, because each user’s unique encryption key

Remove Locky Remove Satan 2 Ransomware and Restore .stn Encrypted Files

For the removal process of Satan 2 ransomware infection, it is strongly advisable to backup the files encrypted by this virus. After this has been completed, recommendations are to follow the removal instructions below. They are created in order to help with the proper removal of the ransomware by isolating it first. In case manual removal is a challenge for you, recommendations are to focus on performing automatic removal with an advanced anti-malware program which will delete every file associated with Satan 2 ransomware and protect your computer from such threats in the future as well.

In case you want to restore encrypted files by Satan 2 ransomware, recommendations are to follow the alternative methods we have posted in step “2. Restore files encrypted by Satan 2” below. They may not be 100% effective in restoring your files, but may restore at least some of them until a decryptor is released for this infection.

Avatar

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove .stn File Virus from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove .stn File Virus

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall .stn File Virus and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by .stn File Virus on your computer.

The usually targeted registries of Windows machines are the following:

  • 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

You can access them by opening the Windows registry editor and deleting any values, created by .stn File Virus there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for .stn File Virus with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by .stn File Virus.

Ransomware infections and .stn File Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of .stn File Virus from Mac OS X.


Step 1: Uninstall .stn File Virus and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to .stn File Virus:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to .stn File Virus. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to .stn File Virus. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove .stn File Virus via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as .stn File Virus. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Click the button below below to download SpyHunter for Mac and scan for .stn File Virus:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by .stn File Virus.

Ransomware infections and .stn File Virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


.stn File Virus FAQ

What is .stn File Virus ransomware and how does it work?

.stn File Virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does .stn File Virus ransomware infect my computer?

Via several ways..stn File Virus Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of .stn File Virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open ..stn File Virus files?

You can't. At this point the ..stn File Virus files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your ..stn File Virus files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by .stn File Virus ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore "..stn File Virus" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..stn File Virus files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of .stn File Virus ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate .stn File Virus ransomware and then remove it without causing any additional harm to your important ..stn File Virus files.

Also, keep in mind that viruses like .stn File Virus ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

1 Comment

  1. AvatarRaj

    My pc also affected this ransomware please give me solution for decrypt my files.please give me solution my important data is encrypted.

    Reply

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