Analysis

  • max time kernel
    146s
  • max time network
    138s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/04/2024, 08:02

General

  • Target

    c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe

  • Size

    771KB

  • MD5

    f797618d3ffd9c1240db9d52a9a977ac

  • SHA1

    51683323368d28657a2916a2c7bd0e5d3b2f2f7c

  • SHA256

    c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3

  • SHA512

    be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482

  • SSDEEP

    24576:e7cwUFF1eUyif8Wg5Mbc0MEK/Qt0N5AM:e7cYSg5M0p7NOM

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .uajs

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 18 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\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
    "C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5000
    • C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
      "C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1548
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\84c58587-00db-4012-ac72-72f4fffc2a43" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4868
      • C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
        "C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4600
        • C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
          "C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3372

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

          fc5408c48a55314c72e200b74330cac4

          SHA1

          7e8889ec3189a40e6078088927bf3612753fa628

          SHA256

          7ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4

          SHA512

          481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77

        • 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

          24acbe75f6b0b1c9e428c74e549ff208

          SHA1

          61ced175574280d3c9d3eb1ecc4bdf7c01bbbdd5

          SHA256

          ec6a7c3a74465ac17d68cf2960899f6eaaa85a3208931c2a3838d3347ec1dbc7

          SHA512

          26650b47a30cbda3df09488482d36740289c4f49bad43a4b45e8e4498b35a0ccf53d5a4d465e95b0c4a1041cb651521b049a7c7ef80a5f01057449ec014810c8

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

          Filesize

          392B

          MD5

          63cdeed2ee9542c9d5d8f6c898d1b32f

          SHA1

          8976da045e280f555e18a3af4a8baa90b0402539

          SHA256

          12e9b04f3dfd97b24a2eeafda29b88d2d847ecc87b645d2668be8bdaa65ee961

          SHA512

          89e5596f19af064a86d8e8afc97f2579c14c92307ec16847d0bf15c2892f0453a7de54dfe675d1894254451953ba8d9fbb8f5daed68d9cbdec7e92e84bdc54f0

        • C:\Users\Admin\AppData\Local\84c58587-00db-4012-ac72-72f4fffc2a43\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe

          Filesize

          771KB

          MD5

          f797618d3ffd9c1240db9d52a9a977ac

          SHA1

          51683323368d28657a2916a2c7bd0e5d3b2f2f7c

          SHA256

          c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3

          SHA512

          be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482

        • memory/1548-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1548-3-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1548-17-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1548-4-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1548-6-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-22-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-36-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-23-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-40-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-38-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-37-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-29-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-30-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-31-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3372-24-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4600-20-0x0000000004990000-0x0000000004A2B000-memory.dmp

          Filesize

          620KB

        • memory/5000-2-0x0000000004B50000-0x0000000004C6B000-memory.dmp

          Filesize

          1.1MB

        • memory/5000-1-0x0000000004AB0000-0x0000000004B4C000-memory.dmp

          Filesize

          624KB