Gapo Virus Ransomware (.gapo File)

Gapo Virus uses the Salsa20 encryption algorithm. This STOP/Djvu Ransomware family is one of the most popular infection!

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Trojan Killer, Trojan Scanner.

About Gapo Ransomware:

NameGapo Virus
File Extension.gapo
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Offline IDjB2aJtVEWRwbJf76a6OKB8sn0BtTgNlHYUC5wLt1
Last seenMay 25, 2023
AlgorithmSalsa20 encryption. If Gapo cannot establish a connection to crooks server before starting the encryption process, it uses the offline key. This key is the same for all victims(!), making it possible to decrypt .gapo files in the future.
RansomFrom $490 to $980 (in Bitcoins)
  1. โฎž Can delete Volume Shadow copies to make victimโ€™s attempts to restore data impossible;
  2. โฎž Adds a list of domains to HOSTS file to block access to certain security-related sites;
  3. โฎž Installs password-stealing Trojan, like Redline Stealer, Vidar Stealer, Smokeloader, Azorult and others;
DistributionThird-party downloaders, installers, peer-to-peer networks, RDP exploits, etc.,
RSA Public Key-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnxcQ1nd53PO/mg9M3Q/R Mu0/Nold0n/2gg0z5Ob4ABlH1q5z2FBWFptCzY5IJTgz7JT35sQPoKwnf2CTvHzg W9RU0PswrFO07G17uKVnOKNT8+xykQqWwKPGNDb7jyneWefUYHhsOQQNRNxs+3j3 BbZDbDK/mIk8YawW1bHJfrrTEnFy/AzWSrTgNnyTIu0Gf4ut2KaRtrqOHzyxEthV vawLxNA23AsrfjAu5Q6L7yXirjkdDqlZp75ywjMA2ygoX1NTQIpkc/Llvw39gy7E V0NfLMnqi9jxQy/LFKhjGGAJOTdUxAhFpdwUoPua/iF/68d8CQLPjbrMZ9EijkbY 1wIDAQAB -----END PUBLIC KEY-----
Other variants
  • Gatq Ransomware (.gatq encrypted files)
  • Gaze Ransomware (.gaze encrypted files)
  • Xaro Ransomware (.xaro encrypted files)
  • Gapo Virus Ransomware (.gapo) File - How does it work?

    Gapo virus is a ransomware-type that belongs to a STOP/Djvu family. Like any other ransomware, it is aimed at your money. This malware encrypts your files with a strong cipher and then asks you to pay the ransom (~$1000) for file decryption. To prevent the file decryption by the alternative ways, Gapo virus makes some changes to your system.

    These changes are related to the security settings. First, malware stops your Microsoft Defender and blocks the third-party security tool if you have one. Then, it changes the Group Policies to block the launch of the installation files of antivirus programs. The final step is blocking access to websites that contain information about file decryption and malware removal. These changes may affect PC usage in the future, so it is better to remove them as soon as possible.

    A few words about the spreading ways of Gapo ransomware: this virus did not appear out of nowhere - you have likely installed it together with a program of some sort. โ€œFreeโ€ programs, which must originally be paid, are created by unknown users. During the hacking process, they are free to add whatever to the executable code of their product - spyware, coin miners, ransomware, or stealer. It is better to avoid such risks, especially when you cannot punish those persons through the police, for example.

    Encryption process

    The Gapo ransomware uses the Salsa20 encryption algorithm. That is not the strongest method, but it still provides an overwhelming amount of possible decryption keys. To brute force the 78-digit number of keys, you need 3.5 unvigintillion years (1*10^65), even if you use the most powerful regular PC. Quantum computers can show a bit better results, but it is still too slow to get your files back while you are alive.

    The exact algorithm of encryption is next: malware scans each folder for the files it is able to encrypt. Then, when it finds the target, it makes a copy of your file, removes the original one, encrypts the copy and leaves it instead of the removed original. Such a procedure is done to prevent the situation when you have already opened the file, so ransomware is not able to read it because of the Windows restrictions. To each encrypted copy, the virus adds the specific extension - ".gapo". Then, ransomware creates a _readme.txt file in the folder where the encrypted file is located, and goes to the next folder.

    .GAPO Files

    Such an encryption method can be exploited for file recovery. Since the original file is deleted, you may try to recover it using the file recovery tools. The less time is passed - the bigger the chance to get your files back, so hurry up!

    Another specific moment that can help you to use the files even after the encryption is the fact that Gapo ransomware encrypts only the first 150KB of each file. Hence, you can try to run a big file, such as video or music, without the encryption. Similar feature also works with other ransomware families - Dharma, Conti and Makop encrypt the same 150KB.

    Ransom note: _readme.txt

    Ransom note is the same for the whole ransomware family. In fact, it is one of the main signs of to which family the certain ransomware belongs. Here is the typical note for STOP/Djvu family:


    Don't worry, you can return all your files!
    All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key.
    The only method of recovering files is to purchase decrypt tool and unique key for you.
    This software will decrypt all your encrypted files.
    What guarantees you have?
    You can send one of your encrypted file from your PC and we decrypt it for free.
    But we can decrypt only 1 file for free. File must not contain valuable information.
    You can get and look video overview decrypt tool:
    Price of private key and decrypt software is $980.
    Discount 50% available if you contact us first 72 hours, that's price for you is $490.
    Please note that you'll never restore your data without payment.
    Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

    To get this software you need write on our e-mail:
    [email protected]

    Reserve e-mail address to contact us:
    [email protected]

    Your personal ID:

    ๐Ÿ”— HowToFix.Guide: How To Decrypt .gapo Files?

    Indicators of Compromise(IOC)

    File NameMD5File Size
    ๐Ÿ“œ SAMPLE.EXE101045d3b58f4e51448fb177ffae7448848384
    ๐Ÿ“œ SAMPLE.EXEa8194b7a6f02ea7ff292cd775535cc34335872
    ๐Ÿ“œ SAMPLE.EXE9d9ea753f4253f24e0e20f695fca5dac847872
    ๐Ÿ“œ SAMPLE.EXEd66c98cb1eaf25c1f738f3c1226b8514336896
    ๐Ÿ“œ SAMPLE.EXE28e74a2edad1cf8cd9d5d40c1d3c2245848384
    ๐Ÿ“œ SAMPLE.EXE9336534a959553038176f8da9b4cffdc336896
    ๐Ÿ“œ SAMPLE.EXEcb7563033253a4f76c6f678ef95837aa335360
    ๐Ÿ“œ SAMPLE.EXEd64fa521bce210bcfa9c04f2b981a5631273856
    ๐Ÿ“œ SAMPLE.EXE949320199552ebb3f948b1c1d1b507cb847360
    ๐Ÿ“œ SAMPLE.EXE1a78ebec194fc908c422a03b6ecfa46c335872