beast

Para detección/bloqueo en tu EDR/SIEM. Fuente: ransomware.live.

Firma de detección defensiva para este grupo (úsala en tu EDR/SIEM). Fuente: ransomware.live.

/*
Beast ransomware
*/


rule Beast
{
    meta:
        author = "rivitna"
        family = "ransomware.beast"
        description = "Beast ransomware Windows payload"
        severity = 10
        score = 100

    strings:
        $h0 = { 6A 00 56 68 ?? ?? 00 00 57 6A 19 68 AA 00 00 00 6A ??
                6A 0A 68 00 10 00 50 50 }
        $h1 = { 6A 00 56 68 ?? ?? 00 00 57 6A 19 68 AA 00 00 00
                68 ?? 00 00 00 6A 0A 68 00 10 00 50 50 }
        $h2 = { 81 BC 24 ?? 00 00 00 50 4B 06 06 75 6?
                81 BC 24 ?? 00 00 00 50 4B 06 07 75 5?
                81 BC 24 ?? 00 00 00 50 4B 05 06 75 }
        $h3 = { C7 44 24 ?? 17 10 14 06 }
        $h4 = { 40 04 19 08 C7 45 ?? 19 04 23 04 C7 45 ?? 3F 04 40 04
                C7 45 ?? 28 04 42 04 C7 45 ?? 43 08 22 04 }

    condition:
        ((uint16(0) == 0x5A4D) and (uint32(uint32(0x3C)) == 0x00004550)) and
        (
            (3 of ($h*))
        )
}

YOUR FILES ARE ENCRYPTED AND STOLEN!
Your files, documents, photos, databases and other important files are encrypted.
You are not able to decrypt it by yourself! The only method of recovering files is to purchase an unique private key.
Only we can give you this key and only we can recover your files.
To be sure we have the decryptor and it works you can send an email: [redactado] and decrypt one file for free.
But this file should be of not valuable!
Do you really want to restore your files?
Write to email: [redactado]
Reserved email: [redactado]
Backup XMPP: [redactado]
Backup XMPP: [redactado]
Attention!
 * Do not rename encrypted files.
 * Do not try to decrypt your data using third party software, it may cause permanent data loss.
 * Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.
 * We have been in your network for a long time. We know everything about your company most of your information has already been downloaded to our server. We recommend you to do not waste your time if you dont wont we start 2nd part.
 * You have 24 hours to contact us.
 * Otherwise, your data will be sold or made public.
BEAST ransomware

• https://www.ransomware.live/group/beast