Analysis

  • max time kernel
    146s
  • max time network
    130s
  • 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 12:42

General

  • Target

    81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe

  • Size

    707KB

  • MD5

    468a3f5c25350ab961951730de8c4ede

  • SHA1

    d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c

  • SHA256

    81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc

  • SHA512

    0ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d

  • SSDEEP

    12288:YSQYWaFRQdi4YyslM3FqvlVdfQ9gqSXHTSPT/HqoBMfffJJlh4jUHDixdSVHA:YSQwFROi4hF1+bdIKLXwTRufff8U+vSq

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes
  • extension

    .vepi

  • 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: 0871PsawqS

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\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
    "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:932
    • C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
      "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4952
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\18670b35-acb2-4ccb-98f4-118fee0d294b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2740
      • C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
        "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3368
        • C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
          "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1280

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

    616d3c6a010e479b2007212b8d9394d8

    SHA1

    4ec157977440d9f6c459a5d57d0f7357407e4322

    SHA256

    437174dbe4c037a1661fded7ca7e43569bd8e2b7a2d79965f6257868f6c7f38d

    SHA512

    207ef12842611a8f5a661269184712f0cc1c8320100ba0684b0b94e6f17f35f99ad077888b25d9dd061d2121e94c63e54ab14ecc1c566ba5def2ff1057dbf865

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

    Filesize

    392B

    MD5

    5d5bcba47f11c475f5a157fdf50300f3

    SHA1

    4e64de416dfea4f909ccec5b565b4ea118ffb836

    SHA256

    72929c83c7a6bfdbb8bbfe5a938257fb7f0b10a41309720c4ef0787252e97dab

    SHA512

    0b825bc576505c3ded5b4f8fe9e6ad4902b52026195de1fec07c805a4819fe43c10fd9f2b5ef900c9e9002113ae26c9ee5f964329f8d40af746bb5461d73fae8

  • C:\Users\Admin\AppData\Local\18670b35-acb2-4ccb-98f4-118fee0d294b\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe

    Filesize

    707KB

    MD5

    468a3f5c25350ab961951730de8c4ede

    SHA1

    d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c

    SHA256

    81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc

    SHA512

    0ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d

  • memory/932-1-0x0000000004840000-0x00000000048D5000-memory.dmp

    Filesize

    596KB

  • memory/932-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp

    Filesize

    1.1MB

  • memory/1280-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1280-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4952-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4952-2-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4952-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4952-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4952-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB