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Overview

overview

10

Static

static

3

buildz.exe

windows7-x64

10

buildz.exe

windows10-1703-x64

10

buildz.exe

windows10-2004-x64

10

buildz.exe

windows11-21h2-x64

10

Sharing

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General

  • Target

    buildz.exe

  • Size

    728KB

  • Sample

    240327-y9g16sbd86

  • MD5

    1ac225bc36c31f9209f984210bd68469

  • SHA1

    b43db3c1f19bca6b35e91ee88edf8c80d4e6c422

  • SHA256

    d69f5817cc5eadb99b3a8b0f87ca4a471c052f151f14180955f14ad78a1acacc

  • SHA512

    e99727b0b993b6911b402eb48c85eb81dd10b76894eabaad196618558f643ab6dd2e5c1a5d393e1537b089fdfdbe1d778c88f62fb0abd9384b461521422e53a3

  • SSDEEP

    12288:yCLwobUsKbD6axHJhie99gldRoo+uoagdWip+KSN7uO7/:yYsmaZJwAglLoo+5WioKSN7ue/

Score
10/10
djvuvidar5739ef2bbcd39fcd59c5746bfe4238c5discoverypersistenceransomwarestealer

Malware Config

Extracted

Family

djvu

C2

http://sajdfue.com/test1/get.php

Attributes
  • extension

    .vook

  • offline_id

    1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.com/files/1/build3.exe

  • ransomnote

    ATTENTION! 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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/3ed7a617738550b0a00c5aa231c0752020240316170955/d71ce1 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0857PsawqS

rsa_pubkey.plain

Extracted

Family

vidar

Version

8.6

Botnet

5739ef2bbcd39fcd59c5746bfe4238c5

C2

https://steamcommunity.com/profiles/76561199658817715

https://t.me/sa9ok
Attributes
  • profile_id_v2

    5739ef2bbcd39fcd59c5746bfe4238c5

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Targets

    • Target

      buildz.exe

    • Size

      728KB

    • MD5

      1ac225bc36c31f9209f984210bd68469

    • SHA1

      b43db3c1f19bca6b35e91ee88edf8c80d4e6c422

    • SHA256

      d69f5817cc5eadb99b3a8b0f87ca4a471c052f151f14180955f14ad78a1acacc

    • SHA512

      e99727b0b993b6911b402eb48c85eb81dd10b76894eabaad196618558f643ab6dd2e5c1a5d393e1537b089fdfdbe1d778c88f62fb0abd9384b461521422e53a3

    • SSDEEP

      12288:yCLwobUsKbD6axHJhie99gldRoo+uoagdWip+KSN7uO7/:yYsmaZJwAglLoo+5WioKSN7ue/

    Score
    10/10
    djvuvidar5739ef2bbcd39fcd59c5746bfe4238c5discoverypersistenceransomwarestealer

    • Detect Vidar Stealer

      stealer

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

      ransomwaredjvu

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

      stealervidar

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2behavioral3behavioral4

MITRE ATT&CK Enterprise v15

Tasks