Analysis

  • max time kernel
    143s
  • max time network
    127s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-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.

  • 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:3004
    • C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
      "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1804
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f4cbe16c-8b55-4bc3-8992-3bc046a99c6d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:5096
      • 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:5012
        • C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
          "C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3488

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

    7e6d5b8617fe039fca48abab0067a4f7

    SHA1

    2eafde995b9010d8ddd19deae32d3f4278696efa

    SHA256

    d7c4ba660fa0493a398ba170ee34569bb08a5009e3684b1bb069951ecc8f4889

    SHA512

    82e6efcc1b70625c75237e51e72a99c33b98b964150e6f963eb00893ee2b30ef927dfd26b1b58df4d4ee40d3267ea26ee90c70b2525442dd69d56fed70437814

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

    Filesize

    392B

    MD5

    e55ff4b633b05f26589dbac13ad74182

    SHA1

    3a9c12b2b00ebdf4f874aa70357441ad6dadf49d

    SHA256

    a92cff4371b0d15d94a6e5a4e87bc3a8b4f1608a7db1569a35d2273c382d99a0

    SHA512

    aa092ddd39ebc80d972ac4c0b79ec289e4136b4c56da159adc526b1bc84341db8bda93f3a33e08ad327010ec768e11004edf8010e9f81b655d15af64aa5af17a

  • C:\Users\Admin\AppData\Local\f4cbe16c-8b55-4bc3-8992-3bc046a99c6d\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe

    Filesize

    707KB

    MD5

    468a3f5c25350ab961951730de8c4ede

    SHA1

    d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c

    SHA256

    81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc

    SHA512

    0ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d

  • memory/1804-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1804-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1804-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1804-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1804-19-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3004-2-0x0000000004B80000-0x0000000004C9B000-memory.dmp

    Filesize

    1.1MB

  • memory/3004-1-0x0000000004A30000-0x0000000004ACB000-memory.dmp

    Filesize

    620KB

  • memory/3488-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-27-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-28-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-32-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-35-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3488-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB