Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 10:20

General

  • Target

    f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe

  • Size

    707KB

  • MD5

    5855e0aa6fddd49c2a10916168549895

  • SHA1

    961fbc732efcfc4842ab4bd356be530dfb383149

  • SHA256

    f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742

  • SHA512

    4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb

  • SSDEEP

    12288:mQ2yr8271g1GoGbPFeCeUvKf42EOzRFSEyITOWPg5sI2ffJCP9VNwMO:mQ2LcPFx5vKw2EO1o5i7fBww

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .vepi

  • offline_id

    EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1

  • payload_url

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

    http://cajgtus.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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 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\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
    "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4444
    • C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
      "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2372
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f1ad07f1-27b5-44c3-99d9-5e8c3ec453f2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2644
      • C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
        "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2896
        • C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
          "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3684

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

    6728aea2631b86a76c237508d8ba9b55

    SHA1

    7a670f95cac088313f7558869162fe01c6dc0ec9

    SHA256

    e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b

    SHA512

    533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5

  • 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

    ca42d8a7810a1cc7a6d7ae7c7afeccb3

    SHA1

    a8fc142d555d94b5923041e0796af94d3ac0d336

    SHA256

    51d25da229cd290a85d6273fa5edad90052f492e30a8673520f899c08d54a521

    SHA512

    09db8c4fb42d66beb7ee2a1efbd0e892af4f0470d9514d8597c3301ac21f3c0c9267ccd8c7e1bd8437476002afca50d88973429252e00e25d11ffe4de1fe459c

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

    Filesize

    392B

    MD5

    a7bf5da62f401908e55503edf8e3fa34

    SHA1

    0abb4e930a8b53547f65efa022c9ae13c41dae7e

    SHA256

    a929981e6a473dff1e790fb70435586131a81e532e07578ae42e0f9adb1aa73f

    SHA512

    0ee2b8719f117719e05d4e29c5ebfe031053836ecd7e2467caca83cc91297b80568d01f0f57a07785c315fa3b95f8b094244da19ee2604aca3b03fe49ef4fb47

  • C:\Users\Admin\AppData\Local\f1ad07f1-27b5-44c3-99d9-5e8c3ec453f2\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe

    Filesize

    707KB

    MD5

    5855e0aa6fddd49c2a10916168549895

    SHA1

    961fbc732efcfc4842ab4bd356be530dfb383149

    SHA256

    f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742

    SHA512

    4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb

  • memory/2372-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2372-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2372-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2372-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2372-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-25-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-26-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-31-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4444-1-0x0000000004910000-0x00000000049AB000-memory.dmp

    Filesize

    620KB

  • memory/4444-3-0x00000000049B0000-0x0000000004ACB000-memory.dmp

    Filesize

    1.1MB