Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    15/04/2024, 23:27

General

  • Target

    50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe

  • Size

    860KB

  • MD5

    7bf2ed31e5b9c59d24f750dbbcf10ab5

  • SHA1

    1ff4a18a6d8ec058be1896dc90757f42e60c588b

  • SHA256

    50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496

  • SHA512

    88ef1d7c63190df6e832dbb71f1790911e5f0b41c492de124f605d4a261e7c8b7a4519e23fc6d8abc9db642940431c97a622e6a7b6f71d7086644a1c7525c04d

  • SSDEEP

    12288:aPeK5kzr8+6omE6wZGkJWGcowKFUXqtDvGBf+MpMMFUMxO38/njdk4:aPQN6jPZK2qgf+MtFURGnjh

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.

  • 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\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
    "C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2336
    • C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
      "C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:656
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8032b57f-c2ee-4e04-83b9-a1d42c353bb7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1060
      • C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
        "C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4320
        • C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe
          "C:\Users\Admin\AppData\Local\Temp\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4484

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

    9a159a096bfbecae70a0583baa15f2bc

    SHA1

    d33a2f2a1deab401933c924d5fa6eb14a3d2718a

    SHA256

    4894418011e794e79cdbd8cfcdd8fac5c57c356c91b11cd9a943954a3e194e2f

    SHA512

    8da0a3a05edf94ed44d7f8c59f8f694e6712c7c214d3cb1def24dfd956ed23e87d1090ab5d871e50ece4dd8af95732209b09bbd1d2d5fc763ac9217d73b3141c

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

    Filesize

    392B

    MD5

    467bf8606e273d2f9c12984bc4b9809d

    SHA1

    9aa946948634a5ee67b3488135014e049a24c181

    SHA256

    f6eb9b2062836fef76891672afd1fade9d40e99226cdf12708268eb448867364

    SHA512

    6e103959f5c9d947b518ba32a2f178971fef8291e3b3496669a85e8e3421c4fcb47196e5e0b6ec8910d300bdb3790863c3c355e955919cc95b9fb015d15f9100

  • C:\Users\Admin\AppData\Local\8032b57f-c2ee-4e04-83b9-a1d42c353bb7\50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496.exe

    Filesize

    860KB

    MD5

    7bf2ed31e5b9c59d24f750dbbcf10ab5

    SHA1

    1ff4a18a6d8ec058be1896dc90757f42e60c588b

    SHA256

    50979b951973f2f49176bca671a6be0c7109439c680d34a57cea62861d4e2496

    SHA512

    88ef1d7c63190df6e832dbb71f1790911e5f0b41c492de124f605d4a261e7c8b7a4519e23fc6d8abc9db642940431c97a622e6a7b6f71d7086644a1c7525c04d

  • memory/656-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/656-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/656-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/656-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/656-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2336-1-0x0000000004C00000-0x0000000004C95000-memory.dmp

    Filesize

    596KB

  • memory/2336-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp

    Filesize

    1.1MB

  • memory/4320-22-0x0000000004AF0000-0x0000000004B8B000-memory.dmp

    Filesize

    620KB

  • memory/4484-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-25-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-39-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-40-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4484-41-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB