Heroes Of The Storm ransomware virus - removal and decryption options

What kind of malware is Heroes of the Storm?

This ransomware was discovered by GrujaRS. Cyber criminals behind Heroes of the Storm (or simply Crypt32) ransomware use the same name as developers of a legitimate game. In fact, the game has nothing to do with this malware.

Heroes of the Storm ransomware is designed to encrypt files and create the "!! YOUR FILES HAS BEEN ENCRYPTED !!.txt" text file (containing a ransom message) in all folders that contain encrypted files. Unlike most other ransomware-type programs, this ransomware leaves the filenames of encrypted files unchanged.

I.e., Heroes of the Storm does not append any extension or modify filenames in any other way.

Screenshot of files encrypted by Heroes of the Storm (no extension appended):

Ransom note overview

The "!! YOUR FILES HAS BEEN ENCRYPTED !!.txt" ransom message states (in English and Korean) that victims can decrypt their files by installing specific decryption software. For instructions about how to obtain this software, victims are urged to send an email to BM-2cT4ifo6SY9QW7gPUJ4EvfeBrJM5jWR4TQ@bitmessage.ch.

It is also stated that attempting to decrypt files with other (third party) software will delete the private decryption key. Unfortunately, there are no third party tools that can decrypt files compromised by Heroes of the Storm ransomware. Typically, only the cyber criminals behind the ransomware have valid decryption software/keys.

Despite this, they should never be trusted or paid - victims who pay the ransom are scammed. Cyber criminals do not send any decryption tools, even after payment. Generally, the only way to recover files free of charge after computer infections by ransomware is to restore them from a backup.

Further encryption of any unaffected files can be prevented by uninstalling the ransomware, however, already compromised files remain encrypted even after removal of the rogue software.

To summarize, users who have their computers infected with ransomware cannot access their files unless they decrypt them with specific decryption software and/or keys, however, these are held only by cyber criminals behind the malicious programs. Most ransomware-type programs encrypt files and create and/or display a ransom message.

Main differences are size of ransom and encryption algorithm (symmetric or asymmetric) that ransomware uses for file encryption. Files encrypted by ransomware can be decrypted without involvement of cyber criminals only in rare cases when the ransomware contains bugs/flaws.

Therefore, maintain backups on a remove server (e.g., Cloud) or unplugged storage device. Some examples of other malware of his type include Jackpot, CoronaCrypt0r and Suncrypt.

How did ransomware infect my computer?

Ransomware and other malware is distributed in a number of ways. In most cases, cyber criminals use malspam campaigns, Trojans, unofficial software activation, third party software updating tools or dubious file/software download sources. Using malspam campaigns, they send emails that have malicious files attached to them (or links to malicious websites).

Malicious software is installed computers when recipients execute a malicious attachment or a downloaded file. Examples of files that cyber criminals attach to their emails are Microsoft Office, PDF documents, archive files such as RAR, ZIP, executable files (.exe) and JavaScript files.

Trojans are malicious programs that can cause chain infections - once they are installed on a computer, they install additional malware (e.g., ransomware). Software 'cracking' tools (unofficial activation tools) are programs that supposedly illegally activate licensed software.

In fact, they install malware instead. Therefore, the use of such tools poses a significant risk. Fake, unofficial software updating tools install malicious programs rather than updates/fixes for installed software, or they infect computers by exploiting bugs/flaws of outdated software that is already installed on the computer.

Untrusted software download channels such as unofficial websites, freeware download websites, free file hosting pages, Peer-to-Peer networks (e.g., torrent clients, eMule and), third party downloaders, etc., are used to trick users into installing malicious programs.

Users install malware through these when they download and open malicious files. Typically, the files are disguised as legitimate and harmless.

Threat Summary:

Name	Heroes of the Storm virus
Threat Type	Ransomware, Crypto Virus, Files locker.
Ransom Demand Message	!! YOUR FILES HAS BEEN ENCRYPTED !!.txt
Free Decryptor Available?	Yes. Files encrypted by Heroes Of The Storm can be decrypted using this tool.
Cyber Criminal Contact	BM-2cT4ifo6SY9QW7gPUJ4EvfeBrJM5jWR4TQ@bitmessage.ch
Detection Names	ALYac (Trojan.Ransom.RansomHOS), BitDefender (Trojan.GenericKD.43740128), ESET-NOD32 (JS/Filecoder.N), Kaspersky (Trojan-Ransom.Win32.Encoder.jxz), Full List Of Detections (VirusTotal)
Symptoms	Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Additional Information	This ransomware does not rename encrypted files.
Distribution methods	Infected email attachments (macros), torrent websites, malicious ads.
Damage	All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing Trojans and malware infections can be installed together with a ransomware infection.
Malware Removal (Windows)	To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. ▼ Download Combo Cleaner To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

How to protect yourself from ransomware infections

All files and programs should be downloaded from official and trustworthy websites - none of the channels mentioned above can be trusted. Files attached to irrelevant emails that are received from suspicious, unknown addresses should not be opened. The same applies to website links.

Rogue files and links can lead to installation of malware or cause other damage. Furthermore, it is important to update and activate installed software with implemented functions or tools provided by the official developers. Third party, unofficial tools should never be used, since they can proliferate malware.

Furthermore, it is illegal to unofficial software/tools to activate licensed software. Keep your computer safe by regularly scanning it with reputable anti-spyware or antivirus software. Keep installed security suites up to date.

If your computer is already infected with Heroes of the Storm, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this ransomware.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Text presented in Heroes of the Storm ransomware text file ("!! YOUR FILES HAS BEEN ENCRYPTED !!.txt") :

Your files has been encrypted by ransomware!
and You can't decrypt with money.
Please install heroes of the storm to decrypt your files.
Attention: DO NOT TURN OFF YOUR PC! IF YOU TURNED OFF YOUR PC, YOU WON'T ABLE TO DECRYPT YOUR FILES!
Emergency contact: BM-2cT4ifo6SY9QW7gPUJ4EvfeBrJM5jWR4TQ@bitmessage.ch
Warning - Any attmpt of decryption file will delete your private key.
당신의 파일들은 랜섬웨어에 의해 암호화되었습니다.
그리고 돈을 줘도 풀 수 없습니다.
히어로즈 오브 더 스톰을 설치해서 파일들을 복호화하세요.
경고: PC를 끄지 마세요! PC를 끄면 파일을 복원할 수 없습니다!
긴급 연락 이메일: BM-2cT4ifo6SY9QW7gPUJ4EvfeBrJM5jWR4TQ@bitmessage.ch
경고: 복호화를 시도하면 파일들은 절대 다시 풀 수 없습니다.

Update 15 September 2020 - Emsisoft has recently released a decryption tool capable of restoring data encrypted by Heroes Of The Storm (Crypt32) ransomware. Therefore, victims can restore their data without payment. You can download the decryptor and find the user manual on the Emsisoft website.

Screenshot of Emsisoft decryptor for Heroes Of The Storm (Crypt32) ransomware:

Heroes of the Storm ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Video suggesting what steps should be taken in case of a ransomware infection:

Quick menu:

• What is Heroes of the Storm virus?
• STEP 1. Reporting ransomware to authorities.
• STEP 2. Isolating the infected device.
• STEP 3. Identifying the ransomware infection.
• STEP 4. Searching for ransomware decryption tools.
• STEP 5. Restoring files with data recovery tools.
• STEP 6. Creating data backups.

Reporting ransomware to authorities:

If you are a victim of a ransomware attack we recommend reporting this incident to authorities. By providing information to law enforcement agencies you will help track cybercrime and potentially assist in the prosecution of the attackers. Here's a list of authorities where you should report a ransomware attack. For the complete list of local cybersecurity centers and information on why you should report ransomware attacks, read this article.

List of local authorities where ransomware attacks should be reported (choose one depending on your residence address):

•  USA - Internet Crime Complaint Centre IC3
•  United Kingdom - Action Fraud
•  Spain - Policía Nacional
•  France - Ministère de l'Intérieur
•  Germany - Polizei
•  Italy - Polizia di Stato
•  The Netherlands - Politie
•  Poland - Policja
•  Portugal - Polícia Judiciária

Isolating the infected device:

Some ransomware-type infections are designed to encrypt files within external storage devices, infect them, and even spread throughout the entire local network. For this reason, it is very important to isolate the infected device (computer) as soon as possible.

Step 1: Disconnect from the internet.

The easiest way to disconnect a computer from the internet is to unplug the Ethernet cable from the motherboard, however, some devices are connected via a wireless network and for some users (especially those who are not particularly tech-savvy), disconnecting cables may seem troublesome. Therefore, you can also disconnect the system manually via Control Panel:

Navigate to the "Control Panel", click the search bar in the upper-right corner of the screen, enter "Network and Sharing Center" and select search result:

Click the "Change adapter settings" option in the upper-left corner of the window:

Right-click on each connection point and select "Disable". Once disabled, the system will no longer be connected to the internet. To re-enable the connection points, simply right-click again and select "Enable".

Step 2: Unplug all storage devices.

As mentioned above, ransomware might encrypt data and infiltrate all storage devices that are connected to the computer. For this reason, all external storage devices (flash drives, portable hard drives, etc.) should be disconnected immediately, however, we strongly advise you to eject each device before disconnecting to prevent data corruption:

Navigate to "My Computer", right-click on each connected device, and select "Eject":

Step 3: Log-out of cloud storage accounts.

Some ransomware-type might be able to hijack software that handles data stored within "the Cloud". Therefore, the data could be corrupted/encrypted. For this reason, you should log-out of all cloud storage accounts within browsers and other related software. You should also consider temporarily uninstalling the cloud-management software until the infection is completely removed.

Identify the ransomware infection:

To properly handle an infection, one must first identify it. Some ransomware infections use ransom-demand messages as an introduction (see the WALDO ransomware text file below).

This, however, is rare. In most cases, ransomware infections deliver more direct messages simply stating that data is encrypted and that victims must pay some sort of ransom. Note that ransomware-type infections typically generate messages with different file names (for example, "_readme.txt", "READ-ME.txt", "DECRYPTION_INSTRUCTIONS.txt", "DECRYPT_FILES.html", etc.). Therefore, using the name of a ransom message may seem like a good way to identify the infection. The problem is that most of these names are generic and some infections use the same names, even though the delivered messages are different and the infections themselves are unrelated. Therefore, using the message filename alone can be ineffective and even lead to permanent data loss (for example, by attempting to decrypt data using tools designed for different ransomware infections, users are likely to end up permanently damaging files and decryption will no longer be possible even with the correct tool).

Another way to identify a ransomware infection is to check the file extension, which is appended to each encrypted file. Ransomware infections are often named by the extensions they append (see files encrypted by Qewe ransomware below).

This method is only effective, however, when the appended extension is unique - many ransomware infections append a generic extension (for example, ".encrypted", ".enc", ".crypted", ".locked", etc.). In these cases, identifying ransomware by its appended extension becomes impossible.

One of the easiest and quickest ways to identify a ransomware infection is to use the ID Ransomware website. This service supports most existing ransomware infections. Victims simply upload a ransom message and/or one encrypted file (we advise you to upload both if possible).

The ransomware will be identified within seconds and you will be provided with various details, such as the name of the malware family to which the infection belongs, whether it is decryptable, and so on.

Example 1 (Qewe [Stop/Djvu] ransomware):

Example 2 (.iso [Phobos] ransomware):

If your data happens to be encrypted by ransomware that is not supported by ID Ransomware, you can always try searching the internet by using certain keywords (for example, a ransom message title, file extension, provided contact emails, crypto wallet addresses, etc.).

Search for ransomware decryption tools:

Encryption algorithms used by most ransomware-type infections are extremely sophisticated and, if the encryption is performed properly, only the developer is capable of restoring data. This is because decryption requires a specific key, which is generated during the encryption. Restoring data without the key is impossible. In most cases, cybercriminals store keys on a remote server, rather than using the infected machine as a host. Dharma (CrySis), Phobos, and other families of high-end ransomware infections are virtually flawless, and thus restoring data encrypted without the developers' involvement is simply impossible. Despite this, there are dozens of ransomware-type infections that are poorly developed and contain a number of flaws (for example, the use of identical encryption/decryption keys for each victim, keys stored locally, etc.). Therefore, always check for available decryption tools for any ransomware that infiltrates your computer.

Finding the correct decryption tool on the internet can be very frustrating. For this reason, we recommend that you use the No More Ransom Project and this is where identifying the ransomware infection is useful. The No More Ransom Project website contains a "Decryption Tools" section with a search bar. Enter the name of the identified ransomware, and all available decryptors (if there are any) will be listed.

Restore files with data recovery tools:

Depending on the situation (quality of ransomware infection, type of encryption algorithm used, etc.), restoring data with certain third-party tools might be possible. Therefore, we advise you to use the Recuva tool developed by CCleaner. This tool supports over a thousand data types (graphics, video, audio, documents, etc.) and it is very intuitive (little knowledge is necessary to recover data). In addition, the recovery feature is completely free.

Step 1: Perform a scan.

Run the Recuva application and follow the wizard. You will be prompted with several windows allowing you to choose what file types to look for, which locations should be scanned, etc. All you need to do is select the options you're looking for and start the scan. We advise you to enable the "Deep Scan" before starting, otherwise, the application's scanning capabilities will be restricted.

Wait for Recuva to complete the scan. The scanning duration depends on the volume of files (both in quantity and size) that you are scanning (for example, several hundred gigabytes could take over an hour to scan). Therefore, be patient during the scanning process. We also advise against modifying or deleting existing files, since this might interfere with the scan. If you add additional data (for example, downloading files/content) while scanning, this will prolong the process:

Step 2: Recover data.

Once the process is complete, select the folders/files you wish to restore and simply click "Recover". Note that some free space on your storage drive is necessary to restore data:

Create data backups:

Proper file management and creating backups is essential for data security. Therefore, always be very careful and think ahead.

Partition management: We recommend that you store your data in multiple partitions and avoid storing important files within the partition that contains the entire operating system. If you fall into a situation whereby you cannot boot the system and are forced to format the disk on which the operating system is installed (in most cases, this is where malware infections hide), you will lose all data stored within that drive. This is the advantage of having multiple partitions: if you have the entire storage device assigned to a single partition, you will be forced to delete everything, however, creating multiple partitions and allocating the data properly allows you to prevent such problems. You can easily format a single partition without affecting the others - therefore, one will be cleaned and the others will remain untouched, and your data will be saved. Managing partitions is quite simple and you can find all the necessary information on Microsoft's documentation web page.

Data backups: One of the most reliable backup methods is to use an external storage device and keep it unplugged. Copy your data to an external hard drive, flash (thumb) drive, SSD, HDD, or any other storage device, unplug it and store it in a dry place away from the sun and extreme temperatures. This method is, however, quite inefficient, since data backups and updates need to be made regularly. You can also use a cloud service or remote server. Here, an internet connection is required and there is always the chance of a security breach, although it's a really rare occasion.

We recommend using Microsoft OneDrive for backing up your files. OneDrive lets you store your personal files and data in the cloud, sync files across computers and mobile devices, allowing you to access and edit your files from all of your Windows devices. OneDrive lets you save, share and preview files, access download history, move, delete, and rename files, as well as create new folders, and much more.

You can back up your most important folders and files on your PC (your Desktop, Documents, and Pictures folders). Some of OneDrive’s more notable features include file versioning, which keeps older versions of files for up to 30 days. OneDrive features a recycling bin in which all of your deleted files are stored for a limited time. Deleted files are not counted as part of the user’s allocation.

The service is built using HTML5 technologies and allows you to upload files up to 300 MB via drag and drop into the web browser or up to 10 GB via the OneDrive desktop application. With OneDrive, you can download entire folders as a single ZIP file with up to 10,000 files, although it can’t exceed 15 GB per single download.

OneDrive comes with 5 GB of free storage out of the box, with an additional 100 GB, 1 TB, and 6 TB storage options available for a subscription-based fee. You can get one of these storage plans by either purchasing additional storage separately or with Office 365 subscription.

Creating a data backup:

The backup process is the same for all file types and folders. Here’s how you can back up your files using Microsoft OneDrive

Step 1: Choose the files/folders you want to backup.

Click the OneDrive cloud icon to open the OneDrive menu. While in this menu, you can customize your file backup settings.

Click Help & Settings and then select Settings from the drop-down menu.

Go to the Backup tab and click Manage backup.

In this menu, you can choose to backup the Desktop and all of the files on it, and Documents and Pictures folders, again, with all of the files in them. Click Start backup.

Now, when you add a file or folder in the Desktop and Documents and Pictures folders, they will be automatically backed up on OneDrive.

To add folders and files, not in the locations shown above, you have to add them manually.

Open File Explorer and navigate to the location of the folder/file you want to backup. Select the item, right-click it, and click Copy.

Then, navigate to OneDrive, right-click anywhere in the window and click Paste. Alternatively, you can just drag and drop a file into OneDrive. OneDrive will automatically create a backup of the folder/file.

All of the files added to the OneDrive folder are backed up in the cloud automatically. The green circle with the checkmark in it indicates that the file is available both locally and on OneDrive and that the file version is the same on both. The blue cloud icon indicates that the file has not been synced and is available only on OneDrive. The sync icon indicates that the file is currently syncing.

To access files only located on OneDrive online, go to the Help & Settings drop-down menu and select View online.

Step 2: Restore corrupted files.

OneDrive makes sure that the files stay in sync, so the version of the file on the computer is the same version on the cloud. However, if ransomware has encrypted your files, you can take advantage of OneDrive’s Version history feature that will allow you to restore the file versions prior to encryption.

Microsoft 365 has a ransomware detection feature that notifies you when your OneDrive files have been attacked and guide you through the process of restoring your files. It must be noted, however, that if you don’t have a paid Microsoft 365 subscription, you only get one detection and file recovery for free.

If your OneDrive files get deleted, corrupted, or infected by malware, you can restore your entire OneDrive to a previous state. Here’s how you can restore your entire OneDrive:

1. If you're signed in with a personal account, click the Settings cog at the top of the page. Then, click Options and select Restore your OneDrive.

If you're signed in with a work or school account,  click the Settings cog at the top of the page. Then, click Restore your OneDrive.

2. On the Restore your OneDrive page, select a date from the drop-down list. Note that if you're restoring your files after automatic ransomware detection, a restore date will be selected for you.

3. After configuring all of the file restoration options, click Restore to undo all the activities you selected.

The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups.

Frequently Asked Questions (FAQ)

How was my computer hacked and how did hackers encrypt my files?

In most cases, users infect computers with ransomware via email (malicious links or attachments), pirated software or cracking tools, or malicious advertisements. Threat actors also use software vulnerabilities, P2P networks, compromised USB drives, and similar channels to distribute ransomware

How to open encrypted files?

Encrypted files cannot be opend until decryption.

Where should I look for free decryption tools for Heroes of the Storm ransomware?

Files encrypted by this ransomware can be decrypted using a decryption tool created by Emsisoft. In other cases, you should check the No More Ransom project website (more information above).

I can pay you a lot of money, can you decrypt files for me?

We do not offer this service. Ransomware-encrypted files are usually impossible to decrypt without the developers' help unless the ransomware has a flaw. So, if someone offers you a paid decryption, they are likely either a scammer or a middleman.

Will Combo Cleaner help me remove Heroes of the Storm ransomware?

Combo Cleaner will scan your computer and remove ransomware, which is an important first step in recovering from a ransomware attack. Unfortunately, security tools cannot decrypt files.

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