Analysis

  • max time kernel
    141s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 04:57

General

  • Target

    628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe

  • Size

    783KB

  • MD5

    f4ac3bb65473350957e8ea894b4a2532

  • SHA1

    315b733cac562d5dc8c6e04b5d26f45bd849f202

  • SHA256

    628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e

  • SHA512

    215d839238739b2242522666a5f3fdd1c7cb967ad2d3d44e00a72d6b16530aa7a0b007274b49613276d8136595bd6a718c9c69d086cd85098d616fbbe94dbdba

  • SSDEEP

    12288:tgWAa4i7KI3tVXz6+8wZss/1c72XZ5jWv6D/c6qWK:uWSIPXR8qssWeg6r/K

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\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe
    "C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe
      "C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4328
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\408a7dc6-7e1b-4087-8561-091ef1a1a63f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:380
      • C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe
        "C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:776
        • C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe
          "C:\Users\Admin\AppData\Local\Temp\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3280

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

    cb35bd9d6c5a4fd50a9263018bbd9784

    SHA1

    efec24f93d2af7bd01969c36870ebc928fa6c790

    SHA256

    be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612

    SHA512

    ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11

  • 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

    899f44a98faebba6aae9269798345a87

    SHA1

    a304c93f7fcec09ae9d2f6c9f28967dbe6d57e6c

    SHA256

    2a2b0c5d4923b9dbe3abc126a3b8e71701b3f62d7ee962c84f1be98637f31510

    SHA512

    8005cc0856dc0c25ad2f2fa8c3a3257650719e67848fab93f09308e26ab0d786da40f54736f1c5bc2533110b45c4620d90347a43eba416e6dd9e79dff5f5f810

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

    Filesize

    392B

    MD5

    7ada31a1faeae1c6931cdf4d69e6698f

    SHA1

    059589de387bcc62a0221ad2ee19a7023b01f6d5

    SHA256

    c9ae61f1a78fe675647d30b14e32aba9f12e10adce67f516aeb7d6c6f912f452

    SHA512

    8a1b5cbe337c7a59d8c200bf3111e69a393ebd96be0f08317608f3bce93f42db634bcb557c120b17663b9c3b61838f18b785e24ae77d5f1c36d2cbc9114c8528

  • C:\Users\Admin\AppData\Local\408a7dc6-7e1b-4087-8561-091ef1a1a63f\628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e.exe

    Filesize

    783KB

    MD5

    f4ac3bb65473350957e8ea894b4a2532

    SHA1

    315b733cac562d5dc8c6e04b5d26f45bd849f202

    SHA256

    628bb09d4a1fb84f30fedf4b6bfdf039fc3f7d6d1dce80d0ea4bf0e83747050e

    SHA512

    215d839238739b2242522666a5f3fdd1c7cb967ad2d3d44e00a72d6b16530aa7a0b007274b49613276d8136595bd6a718c9c69d086cd85098d616fbbe94dbdba

  • memory/2208-2-0x0000000004170000-0x000000000428B000-memory.dmp

    Filesize

    1.1MB

  • memory/2208-1-0x0000000002500000-0x000000000259D000-memory.dmp

    Filesize

    628KB

  • memory/3280-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3280-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4328-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4328-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4328-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4328-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4328-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB