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 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.

  • 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\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
    "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
      "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4684
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3056
      • 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:3716
        • C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe
          "C:\Users\Admin\AppData\Local\Temp\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:536

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

    1be5cc99f62d4382ccb3d51c31a56e8c

    SHA1

    1b7d83e4cfa28e5aeeb8fd1655a758e5d9c572a4

    SHA256

    622287a45aed5bf20f25cb3465b5d669c03185cf9156dac00ef31f7f3f0bbddb

    SHA512

    eaf1e1f81a18900ae46a8ac6015712ac8b219d8f830a2f831687999656c620ea5a956edf242317e68472caebe5981f04736733d5d5106c2429d57114b7f0a9ef

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

    Filesize

    392B

    MD5

    430754119d690cd8dcfddbecee676e53

    SHA1

    5c16069d65e6785207ff38f043f6f27295012673

    SHA256

    73ec1aff226676f024f6e468e8312e1e9044ad21f3311eb690c94cc6875494db

    SHA512

    fb268528951113b87dc59b8b0da32992cdbcc387ee6b395b1d1e1c2be9248ef997fa0158f7c70feef4461a6422ee816967968075f47a54384af6af0cedf8ec56

  • C:\Users\Admin\AppData\Local\4cd38d46-e08f-416e-8fd8-450ccba4790d\3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4.exe

    Filesize

    710KB

    MD5

    c3cdc4206b45b5a62d65c9830bd4b069

    SHA1

    d529698f023e3a58c255286fc03fcde61478ea7a

    SHA256

    3f3d7acba3d06187949309fdfcbb66aa6223218af3393f619fb4754c54f7fad4

    SHA512

    528e0dcb5d7a8b71a9d03631adb39a75aad8e4c1799bc33b001f7111467adb164ed9f670948aa4b5f37627ffa1cd86d7430d612d86489de4410358a196f73dc3

  • memory/536-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/536-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2700-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp

    Filesize

    1.1MB

  • memory/2700-1-0x0000000004960000-0x00000000049FB000-memory.dmp

    Filesize

    620KB

  • memory/4684-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4684-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4684-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4684-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4684-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB