Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-05-2024 16:34

General

  • Target

    3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe

  • Size

    710KB

  • MD5

    c3cdc4206b45b5a62d65c9830bd4b069

  • SHA1

    d529698f023e3a58c255286fc03fcde61478ea7a

  • SHA256

    3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4

  • SHA512

    528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3

  • SSDEEP

    12288:mTTwrfwqgsyZgZpXpiAsezNSgMPz++5mj1GrroU41D1LSrq:mTU3yOZpZqHvPi+5mjeoU49S

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes
  • extension

    .vehu

  • 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: 0872PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 15 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\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
    "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4468
    • C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
      "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2060
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4492
      • C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
        "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3352
        • C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
          "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3892

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

    d0c1c70a9e787abc31e0577791f569e0

    SHA1

    e50b0f424bad8626362fd5a401435a20175b1a18

    SHA256

    8a0f18719084c32f430aca4c0e4998d30e3e54f06603e463b9b2a2cde7049e95

    SHA512

    1cae9562eed2fd4398c43f688ecea741e7528704c8d8fc0441b8e58cb04e9554535aeadd57527686e73964e11297bd208ee4509c2384a2fa7530ccd5091b2801

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

    Filesize

    392B

    MD5

    a3aee276e5e93b74c5d8188a08ef4a4f

    SHA1

    ab48b0c83a99344d42f41c6695c69f1720e7ca14

    SHA256

    e26b19683c7d3ccc5176022615d7d21c368c87368e31ef2de5cf3d7cf744677f

    SHA512

    98c1d47d9069493aac471057b0cd03d58ff657b3bd3e5cd5f852d667cc42f7e5043c56643a0fdca84ffcf9465bd47e2cd452685f49cddae2029fb2d0ad8e29dc

  • C:\Users\Admin\AppData\Local\79eaf2df-fa92-47ff-899c-aa87d71f5c99\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe

    Filesize

    710KB

    MD5

    c3cdc4206b45b5a62d65c9830bd4b069

    SHA1

    d529698f023e3a58c255286fc03fcde61478ea7a

    SHA256

    3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4

    SHA512

    528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3

  • memory/2060-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2060-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2060-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2060-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2060-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3892-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4468-4-0x0000000004B40000-0x0000000004C5B000-memory.dmp

    Filesize

    1.1MB

  • memory/4468-1-0x0000000004AA0000-0x0000000004B37000-memory.dmp

    Filesize

    604KB