Analysis

  • max time kernel
    141s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 23:35

General

  • Target

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe

  • Size

    805KB

  • MD5

    503be6986d24118cfbe56e9cb9748193

  • SHA1

    025ae1229044bb5bf5559f9cb447d026391eb5df

  • SHA256

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf

  • SHA512

    a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175

  • SSDEEP

    12288:unHenMyYcoFXKrKtWe198EIXj24h1ogqMYVvrcVfY:k+nBEKuoe19IXjnvkVjcVg

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\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
    "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
      "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3272
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\36ae9291-ed8c-4672-adfb-31276c7a2d2a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1440
      • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
        "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:984
        • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
          "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3924

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

    a1d955617a4d146e70544d0d9a0390ca

    SHA1

    5ffdc4453b23e24a7cb0e634b26864c169f5257b

    SHA256

    8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3

    SHA512

    0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810

  • 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

    9475db8ab3cfafaaddf4fc8190d94214

    SHA1

    b2ec13a5fcdf6870d7f45dbb43bdba4509c17244

    SHA256

    aa9c3c74a334fab790c997494c03925fde4ddd281efa0002f9fc7f35f4ed3fb5

    SHA512

    fd48188e473d99eedb704b00cda9360d39615bc80baf024952d6ceeb7298ce52878ebe7bbb3d3f5b2813a0414455fd274220b75b77ec06d435b65e5a96b78e84

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

    Filesize

    392B

    MD5

    bac2cbcff6e3e52c8ca7a43c0ba16df3

    SHA1

    e7e2ce0957ab3b6a2a32b6d95bd15a2a2c5300bb

    SHA256

    4a077fa987237e6a8a97c21c3a6cd4cb83b29e2ccd8e13ebb3176994527d80d7

    SHA512

    431b5cfbb5b65d0fdcc5d2a8faaf69f83578208f747ddcd8c22ec16e0764080be61fc3597a2620c091d46a9dcc8cf01767dcf996ab14253b65ac62a415f1518e

  • C:\Users\Admin\AppData\Local\36ae9291-ed8c-4672-adfb-31276c7a2d2a\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe

    Filesize

    805KB

    MD5

    503be6986d24118cfbe56e9cb9748193

    SHA1

    025ae1229044bb5bf5559f9cb447d026391eb5df

    SHA256

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf

    SHA512

    a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175

  • memory/2036-2-0x00000000041D0000-0x00000000042EB000-memory.dmp

    Filesize

    1.1MB

  • memory/2036-1-0x0000000002670000-0x0000000002704000-memory.dmp

    Filesize

    592KB

  • memory/3272-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3272-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3272-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3272-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3272-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3924-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB