Analysis

  • max time kernel
    148s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 23:38

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.

  • 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 4 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:1420
    • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
      "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2916
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\aad6a443-4b17-4a63-8529-573b2dff9f17" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1300
      • 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:3236
        • C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe
          "C:\Users\Admin\AppData\Local\Temp\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4060

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

    1893851cc0fed1ddb0d1f4cb61fdd598

    SHA1

    f7ac0d868974d4338b59cebc7561a13d3b932ade

    SHA256

    ad3acc8777bc5c8f967428a2750430d941f0024630633e71b728d358f42a3d60

    SHA512

    b0cb31e0af58906f9dfac7ece2821fb143ee775325fdde4026aa013c0336e8e925b9d0270ee6c29898f2c28a4b1279175156d2b8b6fcf17195e83bd94b030e74

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

    Filesize

    392B

    MD5

    baadd8df9da9f913362c06f9b48ea63f

    SHA1

    0f5f8d47a6c5dec079e9beb5d8f2ef63468ca3d8

    SHA256

    919f95865ebfc0f98eef9a3588b8c37cdd8670f541677775151056b6bef98438

    SHA512

    3b639f88e3dcfb5e4298d9da9695169bab54a3e9815a15c9b3ba298c460d0e2a7946d25601a43b936e11dc50801b8b101395948a2d0e72233fbb8538efa65f7b

  • C:\Users\Admin\AppData\Local\aad6a443-4b17-4a63-8529-573b2dff9f17\c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf.exe

    Filesize

    805KB

    MD5

    503be6986d24118cfbe56e9cb9748193

    SHA1

    025ae1229044bb5bf5559f9cb447d026391eb5df

    SHA256

    c3c5a69a4e080e62fcc32622e59f07e2ac73e71ae9c909baf1c2fe4bfda523bf

    SHA512

    a16e29bbdb70a9cdac67996e4e76e08b69830bb5ee4d432ba01adb5cae204105c81bd15a95c52d1a2199b76b87aa9a9c295fcafb4ec50565967645814368a175

  • memory/1420-3-0x0000000004120000-0x000000000423B000-memory.dmp

    Filesize

    1.1MB

  • memory/1420-1-0x0000000002690000-0x0000000002727000-memory.dmp

    Filesize

    604KB

  • memory/2916-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2916-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2916-20-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2916-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2916-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-33-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4060-38-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB