Analysis

  • max time kernel
    143s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/04/2024, 19:21

General

  • Target

    56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe

  • Size

    819KB

  • MD5

    b1e4c479c6bfc09e7af5e586b47a5215

  • SHA1

    a5fed6e61786e5042ffcea44250078f0bab868c5

  • SHA256

    56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525

  • SHA512

    f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2

  • SSDEEP

    12288:uMW8zlkzKDV/gRojVmiNY1XsJroBL6JN5dwP7Pqc4vD9OsfdRr9f2h91kq:uMbYRojVmiSNy82srWOOxf2jmq

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .uajs

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • 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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 17 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
    "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
      "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2364
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8d376c37-2cac-475a-a0b6-4652508c9ca7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4100
      • C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
        "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2704
        • C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
          "C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4060

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    1KB

    MD5

    3c6a98dff2c8e5d41183fb934602bccf

    SHA1

    389eea4f6c8b9a19dd6efd65b2c979feeb4262a7

    SHA256

    8c5e90026091280487ae42d5c0f266528cacb6de18c7f3d693ecfdb547b06ac8

    SHA512

    fde8e5de812641dc896e8d8182dcf4244670e431f3310aba576f0f330a9d8a4221eb7513005e9755512d0c645cbf164c4c5f8872689d2e52a58b3f39668de8fd

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    724B

    MD5

    8202a1cd02e7d69597995cabbe881a12

    SHA1

    8858d9d934b7aa9330ee73de6c476acf19929ff6

    SHA256

    58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

    SHA512

    97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

    Filesize

    410B

    MD5

    73b54c0286039b6816bae576296dcde1

    SHA1

    6469d4989412faa90f12e80d323b4ea3c5ef1805

    SHA256

    d941ce0d238c69b04519eaa36101f47f1247c64cd2f183159ddacd90670b7325

    SHA512

    c81f618aa327feea57578248a14d876a8ff7bd91dea7617b75ce443a9eacd68515bd5228c32ab6b43cccb13a27346035d09f77f85845234858e7af59a8bb869f

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

    Filesize

    392B

    MD5

    de9de9bc2d926d063f2698043c43715b

    SHA1

    6f2677e481ac4b1af9d9ff7e2131e6638bf8105a

    SHA256

    3473a45716e6c0a5d9582dff84a36d301f3d48c5db5f1d50e5ff5efdf701f25e

    SHA512

    935a89d78a1e6d39944bbf33d11d6529aa947b9df9b7b85fb59e141612e331c2e9c4bfc53f49621f02114499a9d191ecc98e5a6ed10eeb2c37d86aa82a607456

  • C:\Users\Admin\AppData\Local\8d376c37-2cac-475a-a0b6-4652508c9ca7\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe

    Filesize

    819KB

    MD5

    b1e4c479c6bfc09e7af5e586b47a5215

    SHA1

    a5fed6e61786e5042ffcea44250078f0bab868c5

    SHA256

    56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525

    SHA512

    f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2

  • memory/1776-1-0x00000000049D0000-0x0000000004A6F000-memory.dmp

    Filesize

    636KB

  • memory/1776-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp

    Filesize

    1.1MB

  • memory/2364-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2364-15-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2364-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2364-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2364-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2704-18-0x00000000049E0000-0x0000000004A7C000-memory.dmp

    Filesize

    624KB

  • memory/4060-21-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB